Variables, scopes, and referencing, oh my
Lately I've been furiously modifying my main work project codebase, going through old (old!) code bits and reworking where I could, to modernize (i.e. take advantage of functions/tags that didn't exist back in the day) and/or just increase efficiency. I fully expect my keyboard to just say I've had enough and commit suicide any time now. One of the things I've been dealing with is my past slackness re: variables and scopes, and the crossing of scopes. I've been tossing in Duplicate() around many scope/var bits when, say, setting a particular variable in an application scoped structure to equal an unscoped var, or a session scoped var. The idea behind that is (and I'm sure I'm not telling anyone anything they don't know) is that a straight up application.var = session.var just creates a reference, and doesn't copy by value. So - when running a particular script that uses variables in the app/session scopes, for example, is it all that crucial when going the other way? Is going with variables.var = application.var a bad thing, considering that application var is *not* likely to go away anytime soon? Or is it best practice to still copy by value? In such a scenario, should that app scope var change in mid-stream for whatever reason (unlikely), I assume the variables scope var, being a reference, would reflect that change. Assuming there's zero risk of said app scope var changing/vanishing over the execution time of the script, wouldn't the copy-by-reference be just a smidge less of a resource usage than copying by value? ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:353544 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
Using url variables have an advantage in that you can bookmark the page and return to it or even share the page. IF you want to hide them, you can use a form submission or even use ajax At 04:10 PM 9/19/2011, you wrote: @Jonah, Thanks for the solution. Currently, I have been using the same way as you suggested. Was just wondering if there a different way to do the same instead of passing url variables on each page, like define once, use everywhere. (in my case session/client scope have to be ruled out) Thanks. On Mon, Sep 19, 2011 at 12:10 PM, .jonah jonah@creori.com wrote: ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347542 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
Or you can just do Can we use Request scope in this type of situations? Request is available to all templates within the request scope but it does not persist. If you want the variable to persist, use the session scope. However remember to use an exclusive lock when setting the variable. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347543 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
C'Mon Claude, store a 4 character value to the db, and hit the db for that value every time a session starts? Just use the cookie. If there's a lot of info, then sure, but don't add unnecessary overhead if you don't have to. Steve 'Cutter' Blades Adobe Community Professional Adobe Certified Expert Advanced Macromedia ColdFusion MX 7 Developer http://cutterscrossing.com Co-Author Learning Ext JS 3.2 Packt Publishing 2010 https://www.packtpub.com/learning-ext-js-3-2-for-building-dynamic-desktop-style-user-interfaces/book The best way to predict the future is to help create it On 9/18/2011 5:44 PM, =?ISO-8859-1?Q?Claude_Schn=E9egans wrote: I will need the values to be available for multiple browsers. I mean, the user might want to open a new browser using 'CTRL + N', This is actually not a new browser, but a new window in the same browser. Session variables are available in any window of the same browser. There is no need to save variables in a cookie, session is already maintained through an id in a cookie. If you need to use the same variables across sessions, you will need to save them in the database, set a cookie with some user id. With this id, you can retreive the variables from the database. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347513 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
Thanks for the replies. I got my scenario wrong I guess. So when the user select a year say '2000' and proceeds to next page to see some data for that year. then he clicks 'ctrl + n' to open new window. and now he wants to select a different year say 2003 and want to see 2003 data. The purpose for new window is to compare 2000 and 2003 data. I see that session scope/client scope are not valid in this type of case. Any thoughts? On Mon, Sep 19, 2011 at 6:59 AM, Steve 'Cutter' Blades cold.fus...@cutterscrossing.com wrote: C'Mon Claude, store a 4 character value to the db, and hit the db for that value every time a session starts? Just use the cookie. If there's a lot of info, then sure, but don't add unnecessary overhead if you don't have to. Steve 'Cutter' Blades Adobe Community Professional Adobe Certified Expert Advanced Macromedia ColdFusion MX 7 Developer http://cutterscrossing.com Co-Author Learning Ext JS 3.2 Packt Publishing 2010 https://www.packtpub.com/learning-ext-js-3-2-for-building-dynamic-desktop-style-user-interfaces/book The best way to predict the future is to help create it On 9/18/2011 5:44 PM, =?ISO-8859-1?Q?Claude_Schn=E9egans wrote: I will need the values to be available for multiple browsers. I mean, the user might want to open a new browser using 'CTRL + N', This is actually not a new browser, but a new window in the same browser. Session variables are available in any window of the same browser. There is no need to save variables in a cookie, session is already maintained through an id in a cookie. If you need to use the same variables across sessions, you will need to save them in the database, set a cookie with some user id. With this id, you can retreive the variables from the database. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347516 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
session scope is perfectly valid in this case, either by requiring the form to be submitted or by using AJAX to autosave form fields when they change. You just need to make sure the data is saved before opening a new window. Alternately you could just pass the values to the new window via Javascript on on the URL as a querystring. On Mon, Sep 19, 2011 at 3:07 PM, funand learning funandlrnn...@gmail.com wrote: Thanks for the replies. I got my scenario wrong I guess. So when the user select a year say '2000' and proceeds to next page to see some data for that year. then he clicks 'ctrl + n' to open new window. and now he wants to select a different year say 2003 and want to see 2003 data. The purpose for new window is to compare 2000 and 2003 data. I see that session scope/client scope are not valid in this type of case. Any thoughts? On Mon, Sep 19, 2011 at 6:59 AM, Steve 'Cutter' Blades cold.fus...@cutterscrossing.com wrote: C'Mon Claude, store a 4 character value to the db, and hit the db for that value every time a session starts? Just use the cookie. If there's a lot of info, then sure, but don't add unnecessary overhead if you don't have to. Steve 'Cutter' Blades Adobe Community Professional Adobe Certified Expert Advanced Macromedia ColdFusion MX 7 Developer http://cutterscrossing.com Co-Author Learning Ext JS 3.2 Packt Publishing 2010 https://www.packtpub.com/learning-ext-js-3-2-for-building-dynamic-desktop-style-user-interfaces/book The best way to predict the future is to help create it On 9/18/2011 5:44 PM, =?ISO-8859-1?Q?Claude_Schn=E9egans wrote: I will need the values to be available for multiple browsers. I mean, the user might want to open a new browser using 'CTRL + N', This is actually not a new browser, but a new window in the same browser. Session variables are available in any window of the same browser. There is no need to save variables in a cookie, session is already maintained through an id in a cookie. If you need to use the same variables across sessions, you will need to save them in the database, set a cookie with some user id. With this id, you can retreive the variables from the database. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347517 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
C'Mon Claude, store a 4 character value to the db If the Tax year is the ONLY information needed, then a cookie may be used. But in my mind, there are often more informations to store about the user, like his name, eMail, address, etc. Then the database approach is better. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347518 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
@Russ. I am not sure I understand what you are saying. if my index.cfm is as follows: cfset StructClear(session) form name=frm method=post action=results.cfm select name=dd_year option value=20002000/option option value=20012001/option option value=20022002/option option value=20032003/option /select input type=submit value=Submit name=sbtbutton / /form The second page is as follows: *results.cfm* cfset structappend(session,form) cfdump var=#session# a href=onemorepage.cfmGo to next page/a *onemorepage.cfm* cfdump var=#session# a href=index.cfmGo to search page/a I have application.cfm too which has the following line: CFAPPLICATION NAME=myapp setclientcookies=Yes clientmanagement=Yes sessionmanagement=Yes sessiontimeout=#CreateTimeSpan(1,0,0,0)# applicationtimeout=#CreateTimeSpan(1,0,0,0)# so now the user is on 'onemorepage.cfm' and from here he opens a new window using 'ctrl + N'. On new window he clicks on 'Go to search page' link, and then select a dfferent tax year. Now, I want the old window to show the old tax year for all pages, and new window to show new tax year for all pages. I tested using both session/client. The problem is If I select a different tax year on new window, and then refresh the old window, the old window shows the new value I hope I am clear. On Mon, Sep 19, 2011 at 10:23 AM, wrote: C'Mon Claude, store a 4 character value to the db If the Tax year is the ONLY information needed, then a cookie may be used. But in my mind, there are often more informations to store about the user, like his name, eMail, address, etc. Then the database approach is better. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347519 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
session variables can only be set on the server, a form only exists in HTML if you are not submitting the form then nothing is being sent to the server for you to store in any scope. Therefore you will either need to pass the current form field values between your windows using Javascript or you will need to use AJAX to store the current selection in session scope so that you can then access it on the new window. Russ On Mon, Sep 19, 2011 at 4:10 PM, funand learning funandlrnn...@gmail.com wrote: @Russ. I am not sure I understand what you are saying. if my index.cfm is as follows: cfset StructClear(session) form name=frm method=post action=results.cfm select name=dd_year option value=20002000/option option value=20012001/option option value=20022002/option option value=20032003/option /select input type=submit value=Submit name=sbtbutton / /form The second page is as follows: *results.cfm* cfset structappend(session,form) cfdump var=#session# a href=onemorepage.cfmGo to next page/a *onemorepage.cfm* cfdump var=#session# a href=index.cfmGo to search page/a I have application.cfm too which has the following line: CFAPPLICATION NAME=myapp setclientcookies=Yes clientmanagement=Yes sessionmanagement=Yes sessiontimeout=#CreateTimeSpan(1,0,0,0)# applicationtimeout=#CreateTimeSpan(1,0,0,0)# so now the user is on 'onemorepage.cfm' and from here he opens a new window using 'ctrl + N'. On new window he clicks on 'Go to search page' link, and then select a dfferent tax year. Now, I want the old window to show the old tax year for all pages, and new window to show new tax year for all pages. I tested using both session/client. The problem is If I select a different tax year on new window, and then refresh the old window, the old window shows the new value I hope I am clear. On Mon, Sep 19, 2011 at 10:23 AM, wrote: C'Mon Claude, store a 4 character value to the db If the Tax year is the ONLY information needed, then a cookie may be used. But in my mind, there are often more informations to store about the user, like his name, eMail, address, etc. Then the database approach is better. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347520 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
Or, you could just use js (be it vanilla or a framework like jQuery) to set a cookie when the onChange event of the drop down menu is fired? Unless I misunderstand, it sounds like it doesn't really need to be in the users session. On Mon, Sep 19, 2011 at 11:15 AM, Russ Michaels r...@michaels.me.uk wrote: session variables can only be set on the server, a form only exists in HTML if you are not submitting the form then nothing is being sent to the server for you to store in any scope. Therefore you will either need to pass the current form field values between your windows using Javascript or you will need to use AJAX to store the current selection in session scope so that you can then access it on the new window. Russ On Mon, Sep 19, 2011 at 4:10 PM, funand learning funandlrnn...@gmail.com wrote: @Russ. I am not sure I understand what you are saying. if my index.cfm is as follows: cfset StructClear(session) form name=frm method=post action=results.cfm select name=dd_year option value=20002000/option option value=20012001/option option value=20022002/option option value=20032003/option /select input type=submit value=Submit name=sbtbutton / /form The second page is as follows: *results.cfm* cfset structappend(session,form) cfdump var=#session# a href=onemorepage.cfmGo to next page/a *onemorepage.cfm* cfdump var=#session# a href=index.cfmGo to search page/a I have application.cfm too which has the following line: CFAPPLICATION NAME=myapp setclientcookies=Yes clientmanagement=Yes sessionmanagement=Yes sessiontimeout=#CreateTimeSpan(1,0,0,0)# applicationtimeout=#CreateTimeSpan(1,0,0,0)# so now the user is on 'onemorepage.cfm' and from here he opens a new window using 'ctrl + N'. On new window he clicks on 'Go to search page' link, and then select a dfferent tax year. Now, I want the old window to show the old tax year for all pages, and new window to show new tax year for all pages. I tested using both session/client. The problem is If I select a different tax year on new window, and then refresh the old window, the old window shows the new value I hope I am clear. On Mon, Sep 19, 2011 at 10:23 AM, wrote: C'Mon Claude, store a 4 character value to the db If the Tax year is the ONLY information needed, then a cookie may be used. But in my mind, there are often more informations to store about the user, like his name, eMail, address, etc. Then the database approach is better. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347521 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
Ok, that wasn't clear in the beginning. You want to keep track of DIFFERENT years in each window. Since they're both in the same browser and visiting the same site, they'll be receiving the same cookies and therefore the same session. To do this you'll probably need to pass the year along in the URL as you go from page-to-page. On 9/19/11 8:10 AM, funand learning wrote: @Russ. I am not sure I understand what you are saying. if my index.cfm is as follows: cfset StructClear(session) form name=frm method=post action=results.cfm select name=dd_year option value=20002000/option option value=20012001/option option value=20022002/option option value=20032003/option /select input type=submit value=Submit name=sbtbutton / /form The second page is as follows: *results.cfm* cfset structappend(session,form) cfdump var=#session# a href=onemorepage.cfmGo to next page/a *onemorepage.cfm* cfdump var=#session# a href=index.cfmGo to search page/a I have application.cfm too which has the following line: CFAPPLICATION NAME=myapp setclientcookies=Yes clientmanagement=Yes sessionmanagement=Yes sessiontimeout=#CreateTimeSpan(1,0,0,0)# applicationtimeout=#CreateTimeSpan(1,0,0,0)# so now the user is on 'onemorepage.cfm' and from here he opens a new window using 'ctrl + N'. On new window he clicks on 'Go to search page' link, and then select a dfferent tax year. Now, I want the old window to show the old tax year for all pages, and new window to show new tax year for all pages. I tested using both session/client. The problem is If I select a different tax year on new window, and then refresh the old window, the old window shows the new value I hope I am clear. On Mon, Sep 19, 2011 at 10:23 AM, wrote: C'Mon Claude, store a 4 character value to the db If the Tax year is the ONLY information needed, then a cookie may be used. But in my mind, there are often more informations to store about the user, like his name, eMail, address, etc. Then the database approach is better. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347522 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
@Jonah, Thanks for the solution. Currently, I have been using the same way as you suggested. Was just wondering if there a different way to do the same instead of passing url variables on each page, like define once, use everywhere. (in my case session/client scope have to be ruled out) Thanks. On Mon, Sep 19, 2011 at 12:10 PM, .jonah jonah@creori.com wrote: Ok, that wasn't clear in the beginning. You want to keep track of DIFFERENT years in each window. Since they're both in the same browser and visiting the same site, they'll be receiving the same cookies and therefore the same session. To do this you'll probably need to pass the year along in the URL as you go from page-to-page. On 9/19/11 8:10 AM, funand learning wrote: @Russ. I am not sure I understand what you are saying. if my index.cfm is as follows: cfset StructClear(session) form name=frm method=post action=results.cfm select name=dd_year option value=20002000/option option value=20012001/option option value=20022002/option option value=20032003/option /select input type=submit value=Submit name=sbtbutton / /form The second page is as follows: *results.cfm* cfset structappend(session,form) cfdump var=#session# a href=onemorepage.cfmGo to next page/a *onemorepage.cfm* cfdump var=#session# a href=index.cfmGo to search page/a I have application.cfm too which has the following line: CFAPPLICATION NAME=myapp setclientcookies=Yes clientmanagement=Yes sessionmanagement=Yes sessiontimeout=#CreateTimeSpan(1,0,0,0)# applicationtimeout=#CreateTimeSpan(1,0,0,0)# so now the user is on 'onemorepage.cfm' and from here he opens a new window using 'ctrl + N'. On new window he clicks on 'Go to search page' link, and then select a dfferent tax year. Now, I want the old window to show the old tax year for all pages, and new window to show new tax year for all pages. I tested using both session/client. The problem is If I select a different tax year on new window, and then refresh the old window, the old window shows the new value I hope I am clear. On Mon, Sep 19, 2011 at 10:23 AM, wrote: C'Mon Claude, store a 4 character value to the db If the Tax year is the ONLY information needed, then a cookie may be used. But in my mind, there are often more informations to store about the user, like his name, eMail, address, etc. Then the database approach is better. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347526 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Question on scopes
Hi All- I have a question on variable scopes. I have the following scenario. Suppose I have a dropdown as below with some tax years: form name=frm method=post action=results.cfm select name=dd_year option value=20002000/option option value=20012001/option option value=20022002/option option value=20032003/option /select input type=submit value=Submit name=sbtbutton / /form So once the user logins and selects a year from the drop down, upon clicking the submit button, the year value should be available across all pages. What is the best way to store the value? I mean in which scope? Thanks. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347501 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
What is the best way to store the value? I mean in which scope? Definitely in the session scope. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347502 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
In you submit handler template, apply the FORM.dd_year value to a SESSION scope variable. This keeps that variable uniquer per user, and persists it throughout their browsing session. The other option is to set it to the COOKIE scope, so that it might be available for that user across sessions. Remember to param/cfparam the variable on any page it might be used, so that you can apply a default if the value has not explicitly been set yet. cfparam type=numeric name=COOKIE.birthYear default=0 / select name=dd_year cfloop from=2000 to=2003 index=REQUEST.i option value=#REQUEST.i#cfif COOKIE.birthYear eq REQUEST.i selected=selected/cfif#REQUEST.i#/option /cfloop /select Steve 'Cutter' Blades Adobe Community Professional Adobe Certified Expert Advanced Macromedia ColdFusion MX 7 Developer http://cutterscrossing.com Co-Author Learning Ext JS 3.2 Packt Publishing 2010 https://www.packtpub.com/learning-ext-js-3-2-for-building-dynamic-desktop-style-user-interfaces/book The best way to predict the future is to help create it On 9/18/2011 2:04 PM, fun and learning wrote: Hi All- I have a question on variable scopes. I have the following scenario. Suppose I have a dropdown as below with some tax years: form name=frm method=post action=results.cfm select name=dd_year option value=20002000/option option value=20012001/option option value=20022002/option option value=20032003/option /select input type=submit value=Submit name=sbtbutton / /form So once the user logins and selects a year from the drop down, upon clicking the submit button, the year value should be available across all pages. What is the best way to store the value? I mean in which scope? Thanks. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347503 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
Or you can just do cfset session.dd_year = form.dd_year I swear.. Sometimes, people make things more convoluted then they have to. :) On Sun, Sep 18, 2011 at 11:18 AM, Steve 'Cutter' Blades cold.fus...@cutterscrossing.com wrote: In you submit handler template, apply the FORM.dd_year value to a SESSION scope variable. This keeps that variable uniquer per user, and persists it throughout their browsing session. The other option is to set it to the COOKIE scope, so that it might be available for that user across sessions. Remember to param/cfparam the variable on any page it might be used, so that you can apply a default if the value has not explicitly been set yet. cfparam type=numeric name=COOKIE.birthYear default=0 / select name=dd_year cfloop from=2000 to=2003 index=REQUEST.i option value=#REQUEST.i#cfif COOKIE.birthYear eq REQUEST.i selected=selected/cfif#REQUEST.i#/option /cfloop /select Steve 'Cutter' Blades Adobe Community Professional Adobe Certified Expert Advanced Macromedia ColdFusion MX 7 Developer http://cutterscrossing.com Co-Author Learning Ext JS 3.2 Packt Publishing 2010 https://www.packtpub.com/learning-ext-js-3-2-for-building-dynamic-desktop-style-user-interfaces/book The best way to predict the future is to help create it On 9/18/2011 2:04 PM, fun and learning wrote: Hi All- I have a question on variable scopes. I have the following scenario. Suppose I have a dropdown as below with some tax years: form name=frm method=post action=results.cfm select name=dd_year option value=20002000/option option value=20012001/option option value=20022002/option option value=20032003/option /select input type=submit value=Submit name=sbtbutton / /form So once the user logins and selects a year from the drop down, upon clicking the submit button, the year value should be available across all pages. What is the best way to store the value? I mean in which scope? Thanks. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347504 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
Or you can just do cfset session.dd_year = form.dd_year I swear.. Sometimes, people make things more convoluted then they have to. :) On Sun, Sep 18, 2011 at 11:18 AM, Steve 'Cutter' Blades cold.fus...@cutterscrossing.com wrote: Can we use Request scope in this type of situations? ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347505 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
I would recommend purchasing a CFWACK book and reading through all of the basic documentation. These questions are fundamental to using CF, and without a clear understanding of the answers you are wasting your time and everyone else's. That may sound harsh, but it's the truth. The FREE documentation can teach you about this stuff in a matter of hours - or perhaps minutes, depending upon how fast you read. http://help.adobe.com/en_US/ColdFusion/9.0/Developing/index.html http://help.adobe.com/en_US/ColdFusion/9.0/Developing/WSc3ff6d0ea77859461172e0811cbec22c24-7fd5.html HTH On Sun, Sep 18, 2011 at 1:54 PM, fun and learning funandlrnn...@gmail.comwrote: Or you can just do cfset session.dd_year = form.dd_year I swear.. Sometimes, people make things more convoluted then they have to. :) On Sun, Sep 18, 2011 at 11:18 AM, Steve 'Cutter' Blades cold.fus...@cutterscrossing.com wrote: Can we use Request scope in this type of situations? ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347506 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
Why? On Sun, Sep 18, 2011 at 11:54 AM, fun and learning funandlrnn...@gmail.com wrote: Or you can just do cfset session.dd_year = form.dd_year I swear.. Sometimes, people make things more convoluted then they have to. :) On Sun, Sep 18, 2011 at 11:18 AM, Steve 'Cutter' Blades cold.fus...@cutterscrossing.com wrote: Can we use Request scope in this type of situations? ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347507 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
On 9/18/11 11:54 AM, fun and learning wrote: Or you can just do cfset session.dd_year = form.dd_year Yes, in the form submission handler, but you'll need to param session.dd_year otherwise your output will fail until you submit the form. cfparam type=numeric name=session.dd_year default= / Can we use Request scope in this type of situations? No, the request scope only lives for a single page load, everything is gone when the page is sent to the browser. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347508 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
Thanks for the answer. Between session, client and cookie, I think i will have to use client/cookie to store the values because I will need the values to be available for multiple browsers. I mean, the user might want to open a new browser using 'CTRL + N', so the value of tax year on new window should be the same as the one selected on the old window. One last question is: which is the better option between Client and cookie? On Sun, Sep 18, 2011 at 3:07 PM, .jonah jonah@creori.com wrote: On 9/18/11 11:54 AM, fun and learning wrote: Or you can just do cfset session.dd_year = form.dd_year Yes, in the form submission handler, but you'll need to param session.dd_year otherwise your output will fail until you submit the form. cfparam type=numeric name=session.dd_year default= / Can we use Request scope in this type of situations? No, the request scope only lives for a single page load, everything is gone when the page is sent to the browser. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347509 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
For something simple like that, I'd store it in the user's prefs in the session scope. That way you don't have to set another cookie - the cf session cookie already exists. You may want to store the value with the user's account / login / etc. so it'll hang around longer. Client Scope is a nice concept but the problems are many in the current implementation: http://www.dopefly.com/pages/ColdFusionClientVariablesFinalNail.cfm http://www.petefreitag.com/item/406.cfm On 9/18/11 12:21 PM, funand learning wrote: Thanks for the answer. Between session, client and cookie, I think i will have to use client/cookie to store the values because I will need the values to be available for multiple browsers. I mean, the user might want to open a new browser using 'CTRL + N', so the value of tax year on new window should be the same as the one selected on the old window. One last question is: which is the better option between Client and cookie? On Sun, Sep 18, 2011 at 3:07 PM, .jonahjonah@creori.com wrote: On 9/18/11 11:54 AM, fun and learning wrote: Or you can just do cfset session.dd_year = form.dd_year Yes, in the form submission handler, but you'll need to param session.dd_year otherwise your output will fail until you submit the form. cfparam type=numeric name=session.dd_year default= / Can we use Request scope in this type of situations? No, the request scope only lives for a single page load, everything is gone when the page is sent to the browser. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347510 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
I'm not sure how you got the idea that session vars would not work in some browsers, but this is not the case. All coldfusion variables exist only on the server so the browser is immaterial. A cookie will be saved to identify your session and thus which tells CF which session variables to use. If you want to save form details for later use by the user, i.e. allowing them to edit them later or pass them between pages, then sessions cope is the best way. If you want to store a single value then cfset session.myvar = form.myvar is the best If you want to store an entire form then do cfset session.myform = structcopy(form) then you have all the form fields available to you. This is a quick and simple way to allow users to return to forms and pre-populate them with previously submitted values. Matt Quacks response was a bit harsh, but if you are a beginner, the CFWHACK books are good. -- Russ Michaels www.bluethunderinternet.com : Business hosting services solutions www.cfmldeveloper.com : ColdFusion developer community www.michaels.me.uk : my blog www.cfsearch.com : ColdFusion search engine sky ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347511 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Re: Question on scopes
I will need the values to be available for multiple browsers. I mean, the user might want to open a new browser using 'CTRL + N', This is actually not a new browser, but a new window in the same browser. Session variables are available in any window of the same browser. There is no need to save variables in a cookie, session is already maintained through an id in a cookie. If you need to use the same variables across sessions, you will need to save them in the database, set a cookie with some user id. With this id, you can retreive the variables from the database. ~| Order the Adobe Coldfusion Anthology now! http://www.amazon.com/Adobe-Coldfusion-Anthology/dp/1430272155/?tag=houseoffusion Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:347512 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/groups/cf-talk/unsubscribe.cfm
Minor confusion on variable scopes
I'm trying to set a few variables in my Application.cfc file and I'm a bit confused about scopes. Here's what I have got: cffunction name=onApplicationStart cfset APPLICATION.page_title = My Title cfreturn True /cffunction I can access this anywhere in my site as #APPLICATION.page_title#. But if I leave off the APPLICATION and write cfset page_title = My Title and then try to access a variable #page_title# CF9 throws an error, saying the variable is not defined (I restarted CF before testing this). Variable PAGE_TITLE is undefined. Why does this happen? Do I really need to prefix all variables with APPLICATION? According to the debugger a variable defined in Application.cfc without the APPLICATION prefix does not exist in any scope. Stefan ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:327897 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Minor confusion on variable scopes
Yes, in the methods of Application.cfc, you need to specify the scope, including the Application scope. For Application attributes (sessiontimeout, name, etc), you can specify those in the THIS scope, but only outside the methods: cfcomponent cfset this.name = myApp / cfset this.sessionManagment = true / ... But even Application attributes have to be scoped inside the onApplicationStart method: cffunction name=onApplicationStart cfset application.name = myApp / ... ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:327898 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Minor confusion on variable scopes
Thanks for clearing that up Jason. On 2 Nov 2009, at 11:50, Jason Fisher wrote: Yes, in the methods of Application.cfc, you need to specify the scope, including the Application scope. For Application attributes (sessiontimeout, name, etc), you can specify those in the THIS scope, but only outside the methods: cfcomponent cfset this.name = myApp / cfset this.sessionManagment = true / ... But even Application attributes have to be scoped inside the onApplicationStart method: cffunction name=onApplicationStart cfset application.name = myApp / ... ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:327899 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Minor confusion on variable scopes
I had this question in a job interview once, 'which Application.cfc method shares the variables scope with the rest of the application?'. I, of course, said, 'none of them do, the variables scope is local to the application' and they said that the correct answer was 'onRequest' - total hogwash. The variables scope *is* local to the cfc. However, you can use the OnRequest method to include the requested template, which means that all your code is now local to the cfc instance and shares its variables scope. So: cffunction name=onRequest output=true returnType=void access=public cfargument name=targetPage type=String required=true / cfinclude template=#arguments.targetPage# / /cffunction HTH Dominic 2009/11/2 Stefan Richter ste...@flashcomguru.com I'm trying to set a few variables in my Application.cfc file and I'm a bit confused about scopes. Here's what I have got: cffunction name=onApplicationStart cfset APPLICATION.page_title = My Title cfreturn True /cffunction I can access this anywhere in my site as #APPLICATION.page_title#. But if I leave off the APPLICATION and write cfset page_title = My Title and then try to access a variable #page_title# CF9 throws an error, saying the variable is not defined (I restarted CF before testing this). Variable PAGE_TITLE is undefined. Why does this happen? Do I really need to prefix all variables with APPLICATION? According to the debugger a variable defined in Application.cfc without the APPLICATION prefix does not exist in any scope. Stefan ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:327900 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Custom scopes
Hey All. Quick question, can I define custom scopes for my variables in CF? Example: cfset myscope.var = myvar I've searched the documentation and didn't see anything on it. Thanks, Rick Sanders Webenergy Canada: 902-431-7279 USA: 919-799-9076 Canada: www.webenergy.ca USA: www.webenergyusa.com ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326456 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Custom scopes
Of course. However... what you have really done is create a variable called variables.myscope.var =] -- Alan Rother Adobe Certified Advanced ColdFusion MX 7 Developer Manager, Phoenix Cold Fusion User Group, AZCFUG.org ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326457 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Custom scopes
cfset myscope = structnew() cfset myscope.var = myvar HTH G! On Mon, Sep 21, 2009 at 12:44 PM, Rick Sanders r...@webenergy.ca wrote: Hey All. Quick question, can I define custom scopes for my variables in CF? Example: cfset myscope.var = myvar I've searched the documentation and didn't see anything on it. Thanks, Rick Sanders Webenergy Canada: 902-431-7279 USA: 919-799-9076 Canada: www.webenergy.ca USA: www.webenergyusa.com ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326458 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Custom scopes
In other words, you're implicitly creating a structure called 'myscope' with a key called 'var' (and then that structure gets put into the local/variables scope anyways). On Mon, Sep 21, 2009 at 9:46 AM, Alan Rother alan.rot...@gmail.com wrote: Of course. However... what you have really done is create a variable called variables.myscope.var =] -- Alan Rother Adobe Certified Advanced ColdFusion MX 7 Developer Manager, Phoenix Cold Fusion User Group, AZCFUG.org ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326459 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: Custom scopes
Thanks. Makes sense I have to create the scope before assigning a var to it! -Original Message- From: Charlie Griefer [mailto:charlie.grie...@gmail.com] Sent: September-21-09 1:50 PM To: cf-talk Subject: Re: Custom scopes In other words, you're implicitly creating a structure called 'myscope' with a key called 'var' (and then that structure gets put into the local/variables scope anyways). On Mon, Sep 21, 2009 at 9:46 AM, Alan Rother alan.rot...@gmail.com wrote: Of course. However... what you have really done is create a variable called variables.myscope.var =] -- Alan Rother Adobe Certified Advanced ColdFusion MX 7 Developer Manager, Phoenix Cold Fusion User Group, AZCFUG.org ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326460 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Custom scopes
Rick- It is worth noting that you are really just creating a variable of type struct here, not a root level scope. It's really just semantics, but it will make a difference when communicating with other developers. Calling it a custom scope may confuse others. -Cameron On Mon, Sep 21, 2009 at 1:30 PM, Rick Sanders c...@webenergy.ca wrote: Thanks. Makes sense I have to create the scope before assigning a var to it! -- Cameron Childress Sumo Consulting Inc http://www.sumoc.com --- cell: 678.637.5072 aim: cameroncf email: camer...@gmail.com ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326462 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Custom scopes
No, you don't have to create the 'scope' first. Just saying: cfset myScope.name = Charlie / will implictly create a struct called myScope with a key of name. but, as Cameron points out... referring to this as a custom scope will likely lead to confusion. Might be a good idea to back up a step or two and ask why you're looking to do this? On Mon, Sep 21, 2009 at 10:30 AM, Rick Sanders c...@webenergy.ca wrote: Thanks. Makes sense I have to create the scope before assigning a var to it! -Original Message- From: Charlie Griefer [mailto:charlie.grie...@gmail.com] Sent: September-21-09 1:50 PM To: cf-talk Subject: Re: Custom scopes In other words, you're implicitly creating a structure called 'myscope' with a key called 'var' (and then that structure gets put into the local/variables scope anyways). On Mon, Sep 21, 2009 at 9:46 AM, Alan Rother alan.rot...@gmail.com wrote: Of course. However... what you have really done is create a variable called variables.myscope.var =] -- Alan Rother Adobe Certified Advanced ColdFusion MX 7 Developer Manager, Phoenix Cold Fusion User Group, AZCFUG.org ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326463 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: Custom scopes
I have 2 forums I want to host in CF on one server and the vars are shared. So if I put both forums on the server, the vars will interchange between the 2 forums even if they are on different domains. So instead of going and changing all the names of the vars in the application scope, I would just assign the vars to a new scope and call them from there. Easy find/replace in DW that takes a minute and fixes the issue. It's cfbb. Rick -Original Message- From: Charlie Griefer [mailto:charlie.grie...@gmail.com] Sent: September-21-09 2:43 PM To: cf-talk Subject: Re: Custom scopes No, you don't have to create the 'scope' first. Just saying: cfset myScope.name = Charlie / will implictly create a struct called myScope with a key of name. but, as Cameron points out... referring to this as a custom scope will likely lead to confusion. Might be a good idea to back up a step or two and ask why you're looking to do this? On Mon, Sep 21, 2009 at 10:30 AM, Rick Sanders c...@webenergy.ca wrote: Thanks. Makes sense I have to create the scope before assigning a var to it! -Original Message- From: Charlie Griefer [mailto:charlie.grie...@gmail.com] Sent: September-21-09 1:50 PM To: cf-talk Subject: Re: Custom scopes In other words, you're implicitly creating a structure called 'myscope' with a key called 'var' (and then that structure gets put into the local/variables scope anyways). On Mon, Sep 21, 2009 at 9:46 AM, Alan Rother alan.rot...@gmail.com wrote: Of course. However... what you have really done is create a variable called variables.myscope.var =] -- Alan Rother Adobe Certified Advanced ColdFusion MX 7 Developer Manager, Phoenix Cold Fusion User Group, AZCFUG.org ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326466 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Custom scopes
As long as you have two Application.cfcs or Aplication.cfms using different app names the vars won't be shared between the two. If you are using the same codebase, but two different domain names you will need to recode the app vars so that they use different values. something like this works well Application.myvars[Application1].RootPath = e:\sites\App1\; Application.myvars[Application2].RootPath = e:\sites\App2\; =] On Mon, Sep 21, 2009 at 11:12 AM, Rick Sanders c...@webenergy.ca wrote: I have 2 forums I want to host in CF on one server and the vars are shared. So if I put both forums on the server, the vars will interchange between the 2 forums even if they are on different domains. So instead of going and changing all the names of the vars in the application scope, I would just assign the vars to a new scope and call them from there. Easy find/replace in DW that takes a minute and fixes the issue. It's cfbb. Rick -Original Message- From: Charlie Griefer [mailto:charlie.grie...@gmail.com] Sent: September-21-09 2:43 PM To: cf-talk Subject: Re: Custom scopes No, you don't have to create the 'scope' first. Just saying: cfset myScope.name = Charlie / will implictly create a struct called myScope with a key of name. but, as Cameron points out... referring to this as a custom scope will likely lead to confusion. Might be a good idea to back up a step or two and ask why you're looking to do this? On Mon, Sep 21, 2009 at 10:30 AM, Rick Sanders c...@webenergy.ca wrote: Thanks. Makes sense I have to create the scope before assigning a var to it! -Original Message- From: Charlie Griefer [mailto:charlie.grie...@gmail.com] Sent: September-21-09 1:50 PM To: cf-talk Subject: Re: Custom scopes In other words, you're implicitly creating a structure called 'myscope' with a key called 'var' (and then that structure gets put into the local/variables scope anyways). On Mon, Sep 21, 2009 at 9:46 AM, Alan Rother alan.rot...@gmail.com wrote: Of course. However... what you have really done is create a variable called variables.myscope.var =] -- Alan Rother Adobe Certified Advanced ColdFusion MX 7 Developer Manager, Phoenix Cold Fusion User Group, AZCFUG.org ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326467 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Custom scopes
Alan Rother wrote: As long as you have two Application.cfcs or Aplication.cfms using different app names the vars won't be shared between the two. If you are using the same codebase, but two different domain names you will need to recode the app vars so that they use different values. If one is using the same code base, it is possible to dynamically assign the application name in the Application.cfc| cfm file based on domain names or some other factor. The you still have separate variable spaces without duplicating the code base. ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326468 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
RE: Custom scopes
No, that's not quite true. ColdFusion allows you to implicitly create a structure, and give it a new key in the same line: cfset myStruct.firstname = 'andy' Works just fine. andy -Original Message- From: Rick Sanders [mailto:c...@webenergy.ca] Sent: Monday, September 21, 2009 12:31 PM To: cf-talk Subject: RE: Custom scopes Thanks. Makes sense I have to create the scope before assigning a var to it! -Original Message- From: Charlie Griefer [mailto:charlie.grie...@gmail.com] Sent: September-21-09 1:50 PM To: cf-talk Subject: Re: Custom scopes In other words, you're implicitly creating a structure called 'myscope' with a key called 'var' (and then that structure gets put into the local/variables scope anyways). On Mon, Sep 21, 2009 at 9:46 AM, Alan Rother alan.rot...@gmail.com wrote: Of course. However... what you have really done is create a variable called variables.myscope.var =] -- Alan Rother Adobe Certified Advanced ColdFusion MX 7 Developer Manager, Phoenix Cold Fusion User Group, AZCFUG.org ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326470 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Custom scopes
Alan Rother wrote: As long as you have two Application.cfcs or Aplication.cfms using different app names the vars won't be shared between the two. If you are using the same codebase, but two different domain names you will need to recode the app vars so that they use different values. If one is using the same code base, it is possible to dynamically assign the application name in the Application.cfc| cfm file based on domain names or some other factor. The you still have separate variable spaces without duplicating the code base. That's the route I was going to suggest... Something like this should work fairly well to separate your forums into their own applications. cfcomponent displayname=Application.cfc cfset temp = cgi.server_name / cfset temp = rereplace(temp,^www\.,) / cfset temp = listfirst(temp,.) / cfset this.applicationname = temp / ... /cfcomponent -- s. isaac dealey ^ new epoch isn't it time for a change? ph: 817.385.0301 http://onTap.riaforge.org/blog ~| Want to reach the ColdFusion community with something they want? Let them know on the House of Fusion mailing lists Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:326474 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
scopes
ok I was trying something and did this: cfif isdefined(url.username) cfset form = duplicate(url) /cfif And then I go about the rest as if the request came from a form post (I use form dot notation everywhere afterwards). When I did a cfdump var=#form# it doesn't recognize the form scope, but this works cfdump var=#variables.form# But every where else in the code it works fine (recorgnizes all form dot names that were originally sent as url parameters) So is cf not supposed to handle the dump 'logically'? Can someone please reason this behavior? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:320928 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: scopes
all your form dot names are evaluated by cf as variables.form.somename 'form' is a reserved scope name in cf. it is noted in cf reference manual that one should NOT use built-in cf scope names as variable names. when you do, you can never be sure what you get in the end... like in your case, cf creates a variable named 'form' in the variables scope - it has no relation to the built-in form scope (thus you get an empty form dump). what you should use instead is: cfif structkeyexists(url, username) cfloop collection=#url# item=key cfset form[key] = url[key]!--- or form[key] = duplicate(url[key]) if you need a deep copy --- /cfloop /cfif Azadi Saryev Sabai-dee.com http://www.sabai-dee.com/ Brian Dumbledore wrote: ok I was trying something and did this: cfif isdefined(url.username) cfset form = duplicate(url) /cfif And then I go about the rest as if the request came from a form post (I use form dot notation everywhere afterwards). When I did a cfdump var=#form# it doesn't recognize the form scope, but this works cfdump var=#variables.form# But every where else in the code it works fine (recorgnizes all form dot names that were originally sent as url parameters) So is cf not supposed to handle the dump 'logically'? Can someone please reason this behavior? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:320930 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: scopes
Just use the StructAppend() function, a lot less code. cfset StructAppend(FORM, URL, false) / May or may not want that over write flag set to false, just depends on the situation/goals. On Wed, Mar 25, 2009 at 11:01 AM, Azadi Saryev az...@sabai-dee.com wrote: all your form dot names are evaluated by cf as variables.form.somename 'form' is a reserved scope name in cf. it is noted in cf reference manual that one should NOT use built-in cf scope names as variable names. when you do, you can never be sure what you get in the end... like in your case, cf creates a variable named 'form' in the variables scope - it has no relation to the built-in form scope (thus you get an empty form dump). what you should use instead is: cfif structkeyexists(url, username) cfloop collection=#url# item=key cfset form[key] = url[key]!--- or form[key] = duplicate(url[key]) if you need a deep copy --- /cfloop /cfif Azadi Saryev Sabai-dee.com http://www.sabai-dee.com/ Brian Dumbledore wrote: ok I was trying something and did this: cfif isdefined(url.username) cfset form = duplicate(url) /cfif And then I go about the rest as if the request came from a form post (I use form dot notation everywhere afterwards). When I did a cfdump var=#form# it doesn't recognize the form scope, but this works cfdump var=#variables.form# But every where else in the code it works fine (recorgnizes all form dot names that were originally sent as url parameters) So is cf not supposed to handle the dump 'logically'? Can someone please reason this behavior? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:320932 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: scopes
Got you. So I guess in the above scenario, when I do a form dot, it resolves to variables dot form dot but if there is no dot (if I am accessing the whole structure), it doesn't try it in the variables scope. I did a cfoutput#structkeylist(form)#/cfoutput and it came back as blank. Thanks for your time ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:320934 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: scopes
oh yes, structAppend, of course! forgot about that one... Azadi Saryev Sabai-dee.com http://www.sabai-dee.com/ Aaron Rouse wrote: Just use the StructAppend() function, a lot less code. cfset StructAppend(FORM, URL, false) / May or may not want that over write flag set to false, just depends on the situation/goals. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:320936 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: scopes
If I ever need to do this, I just use: cfset FORM = URL / You don't need to duplicate the Struct, as you're not going to have any problems with the original URL data changing throughout the lifetime of the page. Seb On 25 Mar 2009, at 16:17, Adrian Lynch wrote: I'm not sure if you're saying it works or doesn't work. If it doesn't, try FORM.putAll(URL) or StructAppend(FORM, URL) to get the URL vars into the FORM scope. Adrian -Original Message- From: Brian Dumbledore [mailto:psteja2...@yahoo.com] Sent: 25 March 2009 16:31 To: cf-talk Subject: scopes ok I was trying something and did this: cfif isdefined(url.username) cfset form = duplicate(url) /cfif And then I go about the rest as if the request came from a form post (I use form dot notation everywhere afterwards). When I did a cfdump var=#form# it doesn't recognize the form scope, but this works cfdump var=#variables.form# But every where else in the code it works fine (recorgnizes all form dot names that were originally sent as url parameters) So is cf not supposed to handle the dump 'logically'? Can someone please reason this behavior? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:320943 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: scopes
I'm not sure if you're saying it works or doesn't work. If it doesn't, try FORM.putAll(URL) or StructAppend(FORM, URL) to get the URL vars into the FORM scope. Adrian -Original Message- From: Brian Dumbledore [mailto:psteja2...@yahoo.com] Sent: 25 March 2009 16:31 To: cf-talk Subject: scopes ok I was trying something and did this: cfif isdefined(url.username) cfset form = duplicate(url) /cfif And then I go about the rest as if the request came from a form post (I use form dot notation everywhere afterwards). When I did a cfdump var=#form# it doesn't recognize the form scope, but this works cfdump var=#variables.form# But every where else in the code it works fine (recorgnizes all form dot names that were originally sent as url parameters) So is cf not supposed to handle the dump 'logically'? Can someone please reason this behavior? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:320940 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: scopes
It never hurts to ask. Thank you all for your time. cfset form = url seems simple but I am not sure if it sets the default form structure to refer to url structure or it creates a variables.form wihch refers to url. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:320948 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: CFCs, Scopes Thread Safety code review
yes thats where query in the add to cart comes into play, from now on when they add an item I check to see if it is active AND active = 'on' lol anyhow again thank for the help :) ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317310 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: CFCs, Scopes Thread Safety code review
yes thats where query in the add to cart comes into play, from now on when they add an item I check to see if it is active AND active = 'on' lol anyhow again thank for the help :) I figured that was the case, but that still doesn't eliminate the race condition. The cart lives for the duration of their session, which is like 20 minutes or so. So the item that was active when they added it to their cart could become inactive at any time after it's added and before they check out. -- s. isaac dealey ^ new epoch isn't it time for a change? ph: 781.769.0723 http://onTap.riaforge.org/blog ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317320 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: CFCs, Scopes Thread Safety code review
I figured that was the case, but that still doesn't eliminate the race condition. The cart lives for the duration of their session, which is like 20 minutes or so. So the item that was active when they added it to their cart could become inactive at any time after it's added and before they check out. very true. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317321 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: CFCs, Scopes Thread Safety code review
Hi again Isaac, you just hit the nail on the head, the query given is just 1 of hundreds in that CFC but the problem of the user deleting a category happen sometime back. Halloween products after the season had ended and a customer placed an order they should not. I put it down to a catching issue at the time. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317287 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: CFCs, Scopes Thread Safety code review
Hi again Isaac, you just hit the nail on the head, the query given is just 1 of hundreds in that CFC but the problem of the user deleting a category happen sometime back. Halloween products after the season had ended and a customer placed an order they should not. I put it down to a catching issue at the time. Ahh... seasonal items... yeah, that would make it more likely... but although I would still recommend adding the var in that function, it won't eliminate the race condition in that case. You'll still need to check the item(s) individually when they're added to the cart and probably again when the user reaches the checkout if you want to handle all the possible race-condition scenarios with that. If the guy puts something in his cart and is shopping around for a few minutes while the item is removed from the inventory, then he'll still get to the checkout with the item unless you do some kind of check and tell him woops, this was removed from the inventory. Although personally my preference would be not to remove anything from the cart, like, unless they actually ran out of stock and needed to give him a store credit or a refund, once it's in the cart, I would consider it set until he checks out -- no price changes, etc. Because he agreed to the price when he added it to the cart. If he agreed to 8 and then he reaches the check out and it's 10 or 12 or whatever, he's liable to be unhappy about that and consider it poor service. -- s. isaac dealey ^ new epoch isn't it time for a change? ph: 781.769.0723 http://onTap.riaforge.org/blog ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317296 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
CFCs, Scopes Thread Safety code review
I am currently on a performance crusade and have been rewriting lots of my
current projects. One of the biggest changes as a result has been the way I
architect my applications. I have started to use the application scope to cache
commonly used components. For example...
===
application.appObjs = structNew();
application.appObjs.securitySQLcfc =
createObject(component,components.security);
application.appObjs.commomSQLcfc =
createObject(component,components.common-sql);
===
I recently posted a comment on a blog regarding this when the CF Guru himself
Mr Sean Corfield recommend if I was going to do this, it was possible I could
run into some thread safety issues. Now I have to be honest, I read about this
a year or so back but never really paid attention. However it does have me
worried a little now. From my understanding... because I create my CFCs in the
application scope the CFCâs are treated just like other applications vars ie.
everyone shares it and the issue comes because this could include scopes and
variables in CFCs not VAR-declare. The word singleton was mention, from my JAVA
days I remember this as being an object created once but it can't be
instantiated elsewhere in the application, well if thatâs correct then that
was my desire right?
Ok, on the question, honestlol
A clients website gets around 5k of traffic a day and I have already cache some
commonly used components however this was before Mr Sean Corfield reminder on
CFCs, Scopes Thread Safety! I have not had any reported issues with the site.
I am being naive or lucky?
For example, most of the components are just simple SQL statement which I only
want as a singleton, why create the object every time? I also donât think
CFCs, Scopes Thread Safety would be an issue here, is this correct or not?
example code...
===
cffunction name=getProductMenu returntype=query hint=returns product
menu
cfquery name=productquery datasource=#application.appConfig.dbSource#
username=#application.appConfig.dbUsername#
password=#application.appConfig.dbPassword#
SELECT s.storeId, s.name as storeName, s.metaDescription as storeMeta,
s.pos, d.depId, d.name as depName, d.metaDescription as depMeta, d.pos, c.name
as catName, c.metaDescription as catMeta, c.catId, (SELECT COUNT(*) as proCount
FROM products p WHERE p.catId = c.catId AND p.active != 'off') as empt
FROM stores s
LEFT JOIN departments d on s.storeId = d.storeId
LEFT JOIN categories c on d.depId = c.depId
AND (SELECT COUNT(*) as proCount FROM products p WHERE p.catId = c.catId
AND p.active != 'off') 0
/cfquery
cfreturn productquery
/cffunction
===
The only one code that does concern me is my cart cfc, originally if it was in
a include and I have only just added it to a components, yes its a little messy
at the moment but it works. I have had not issues but if someone could look at
it :)
sorry it long
===
cffunction name=addtoCart access=public hint=adds a new item to the cart
!--- if cart session does not exist, create it ---
cfif not structkeyexists(session,cartItem)
cflock timeout=60 type=exclusive
cfset session['cartItem'] = structnew()
/cflock
/cfif
!---gets option id's from product form---
cfif structkeyexists(FORM, optVal) AND FORM['optVal'] GT 0 AND
FORM['optVal'] NEQ
cfset productOptionId0 = Arraynew(1)
cfset val = #form.optVal# - 1
cfloop from=0 to=#val# index=this
cfset Vsel = form.sel0
cfif isDefined('form.sel0')
cfset formval = Evaluate(form.sel this)
cfset optvals = ListFirst(formval,*)
/cfif
cfset ArrayAppend( productOptionId0, #optvals# ) /
/cfloop
cfset optionList = ArrayToList(productOptionId0)
cfoutput #optionList#
cfparam name=form.productOptionId default=#optionList#,
/cfoutput
/cfif
!--- if cart item does not exist, create it ---
cfif structkeyexists(form,productid) and form['productid'] neq and
structkeyexists(form,qty) and form['qty'] gt 0
!--- create default node for product id ---
cfset itemNode = pCode_#form['productid']#_1
!--- if no node exists for the given product, create it. ---
cfif not structkeyexists(session['cartItem'],itemNode)
!--- define new node as a struct ---
cfset session['cartItem'][itemNode] = structnew()
cfset session['cartItem'][itemNode]['aQty'] = form['qty']
!--- grab the product info based on id ---
cfquery name=getProd datasource=#application.appConfig.dbSource#
username=#application.appConfig.dbUsername
Re: CFCs, Scopes Thread Safety code review
On Tue, Dec 30, 2008 at 5:36 AM, Glyn Jackson wrote: application.appObjs = structNew(); application.appObjs.securitySQLcfc = createObject(component,components.security); application.appObjs.commomSQLcfc = createObject(component,components.common-sql); Just to make sure it's clear, that code above, by itself, does not cache anything. If you are using Application.cfc, then it would need to be placed inside of onApplicationStart() in order to be cached. If you are using Application.cfm, then you would need to place it inside of a check to make sure the variables do not exist. For example: cfif NOT structKeyExists(application, appObjs) !--- create the objects here --- /cfif A clients website gets around 5k of traffic a day and I have already cache some commonly used components however this was before Mr Sean Corfield reminder on CFCs, Scopes Thread Safety! I have not had any reported issues with the site. I am being naive or lucky? 5k a day is very little traffic, in terms of large scale applications. Having no issues/bugs with that amount of traffic is not, in my opinion, a good judge of the application's safety. For example, most of the components are just simple SQL statement which I only want as a singleton, why create the object every time? I also don't think CFCs, Scopes Thread Safety would be an issue here, is this correct or not? example code... If the object is shared amongst the entire application, and only needed once, then yes, create it once and cache it. But it still has to be thread safe. ;-) cffunction name=getProductMenu returntype=query hint=returns product menu cfquery name=productquery datasource=#application.appConfig.dbSource# username=#application.appConfig.dbUsername# password=#application.appConfig.dbPassword# SELECT s.storeId, s.name as storeName, s.metaDescription as storeMeta, s.pos, d.depId, d.name as depName, d.metaDescription as depMeta, d.pos, c.name as catName, c.metaDescription as catMeta, c.catId, (SELECT COUNT(*) as proCount FROM products p WHERE p.catId = c.catId AND p.active != 'off') as empt FROM stores s LEFT JOIN departments d on s.storeId = d.storeId LEFT JOIN categories c on d.depId = c.depId AND (SELECT COUNT(*) as proCount FROM products p WHERE p.catId = c.catId AND p.active != 'off') 0 /cfquery cfreturn productquery /cffunction ^ That is *not* thread safe. While you'd probably get away with it since it is not using any client-supplied variables, it still is not thread safe. You need to var *all* variables that are not part of the object's properties. cffunction name=getProductMenu cfset var productquery = / cfquery name=productquery !-- the query --- /cfquery cfreturn productquery / /cffunction ^ Now we're thread safe. Another point, not necessarily related to thread safety, but more of a best practices thing. You don't really want your objects directly referencing things that are outside of them, such as your datasource information. This information should really be passed into the object when it is created. For example... application.appObjs.securitySQLcfc = createObject(component,components.security).init(dbSource: application.appConfig.dbSource, dbUsername: application.appConfig.dbUsername, dbPassword: application.appConfig.dbPassword); Note that we've added an init() method to the object creation, and are passing in three arguments for our datasource information. Now, inside of the CFC we'll add an init() method. cffunction name=init hint=I initialize the object returntype=any output=false access=public cfargument name=dbSource type=string required=true / cfargument name=dbUsername type=string required=true / cfargument name=dbPassword type=string required=true / cfscript variables.dbSource = arguments.dbSource; variables.dbUsername = arguments.dbUsername; variables.dbPassword = arguments.dbPassword; return this; /cfscript /cffunction One note to make about the returntype of the init() method. In the example I used 'any', but in reality I would use the class type of the object. So, let's say that your CFC is named 'foo.cfc', I would use returntype=foo. Now that we have passed in our datasource information, we can alter our queries to use it rather than going outside of the object to get data. This is key to encapsulation. So our productquery would now look like so: cfquery name=productquery datasource=#variables.dbSource# username=#variables.dbUsername# password=#variables.dbPassword# !--- query here --- /cfquery You can leave off the variables. if you'd like, but it would be better to leave it there so that you know where those are coming from when looking back at the code later. Now then, I would also recommend studying about using getters and setters, sometimes referred to as accessors and mutators. But for the sake of simplicity and not overwhelming you all at once, I
Re: CFCs, Scopes Thread Safety code review
Sorry it was not clear about how I was catching. The CFCs are indeed created inside the onApplicationStart function (application.cfc) Also re traffic: it's not a large amount I would agree, but for a small ecommerce store it does handle £50,000 of orders per month so for them that traffic is very valuable and the cart and order system all written in CF must be working correctly. ..NET and jsp is normally my bag but over the last few years CF has been the love of my life (donât tell the wife) Thank for the examples Matt, I really do appreciate all the help I am giving. I am glad I was pointed in this direction and posted here. I just needed some examples to understand what Sean Corfield was saying and I got it. The encapsulation advice was excellent, I was not aware you could e.g foo as the return type. I understand the principles of encapsulation, inheritance, polymorphism etc from my JAVA 2.0 classes back many years back but was not aware that most of these concepts (term used loosely) could be applied in CF i.e object-oriented design patterns (please not on hit me, because I said the word OO and CF) I would really like any links to books and articles so I can learn more on CFCs and OO design patterns in CF and how to apply them using CFCs (ps all I know currently has been self-taught from blogs and Ben Fortaâs books) Anyway back to the point: if i var-declare all variables regardless, i should be ok, right? again thanks Matt have been a big help ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317272 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: CFCs, Scopes Thread Safety code review
On Tue, Dec 30, 2008 at 11:46 AM, Glyn Jackson wrote: Also re traffic: it's not a large amount I would agree, but for a small ecommerce store it does handle £50,000 of orders per month so for them that traffic is very valuable and the cart and order system all written in CF must be working correctly. I was not knocking 5k of traffic. Most websites don't see that in an entire lifetime. I was just pointing out that it should not be used as a measurement of an application's security. :-) I would really like any links to books and articles so I can learn more on CFCs and OO design patterns in CF and how to apply them using CFCs (ps all I know currently has been self-taught from blogs and Ben Forta's books) I don't know of any OO+CF books out there off the top of my head. Most are written to cater to other languages such as Java. Those same principles can (and should) be applied to CF though. Anyway back to the point: if i var-declare all variables regardless, i should be ok, right? Any variable that is not shared between methods should be var'd, yes. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317273 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: CFCs, Scopes Thread Safety code review
Glyn, Hal Helms (http://www.halhelms.com/) offers some solid info on OO with CF and you can also explore Ben Nadel's journey down the OO road (http://www.bennadel.com/blog/). In addition, check out ColdBox or Model-Glue for OO frameworks that are pure CF. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317274 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: CFCs, Scopes Thread Safety code review
@ Jason: thanks for the links I will check them out. I have been learning ColdBox over the last few months. It was cool until I found out half way into my project I could not call the layout without the handler. I don't that defeats the point of MVC but I needed it to brake the rules just once and it was not versatile to do so. The reason for this was a SOAP request where the page including the view needed to be retuned over HTTP by a .NET application (and a gateway in CF). I am sure thats another post altogether lol. @ Matt: I know what you meant in ref to the traffic and application lol. I am very impressed with CF, it has taken a lot of work to make the application accessible and to integrate with there current systems but CF and XML work together very well. PS have i given up on the backend for accessibility CF + EXT 2.0 = not accessibility! again thanks for all your help I am sure I will be posting more here now :) ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317275 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: CFCs, Scopes Thread Safety code review
Someone else probably already mentioned this. The productmenu function is not thread safe, although it's not a huge issue. Each time the function executes it places the query result in the variables scope of the cfc, which isn't where you want it generally speaking... However, the danger with this particular race condition for the moment is small. It might result in someone getting a menu that contains a category that doesn't have any products in it, or not containing one that does. But also in this case, even if you elminate the race condition within the function, the end result of the user seeing a slightly incorrect menu would still exist because the race condition is also created again by the nature of the web. A guy hits the page, gets the menu and then off somewhere else the client deletes that category. But the user still has the page open in their browser and when they click the link, bang! They come to a page that may or may not work because the category doesn't exist or maybe doesn't have any products in it. But this is the kind of race condition that a lot of applications have and rarely becomes an issue because well, for starters the people using the site have to do several things at the same time and while selecting a category is common, deleting one is not. So right off the bat, you're not likely to see the result of the race condition very often, because someone has to delete a category or deactivate its last product first and that rarely happens. And then even on the rare occasion on which all these events line up just right, I'm not sure how many people will actually report the error or the page that's not working to the store. Often it's not so important to them and just going somewhere else is easier. So yeah, in that case, the fact that you're not having problems is kind of coincidental. If we're talking about best practice on the other hand, you always want to use a cfset var queryname = 0 / before every query in your CFCs. -- s. isaac dealey ^ new epoch isn't it time for a change? ph: 781.769.0723 http://onTap.riaforge.org/blog ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;207172674;29440083;f Archive: http://www.houseoffusion.com/groups/cf-talk/message.cfm/messageid:317278 Subscription: http://www.houseoffusion.com/groups/cf-talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
2 questions: ensuring a file is only included once, and scrubbing form and url scopes
I've got two questions. First: Is there a way to make sure a file is only cfincluded once? I'm using cfinclude to include a UDF library in the onRequestStart() method of my application.cfc, but in my debug output, that file has a file count of 7, which has led me to realize that it's also being included when all of the other cfc and cfm files that go into the page are being called. Second: What method/code do you use to scrub/trim values in the FORM and URL scopes? Thanks Pete ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:310052 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: 2 questions: ensuring a file is only included once, and scrubbing form and url scopes
Pete: 1. You could check for the existence of a variable (or function) in the cfinclude, like this: cfif NOT isDefined(var_name_from_include) cfinclude template=whatever.cfm /cfif 2. There are some custom tags/udfs out there for this, but I haven't used them. I'd check CFLIB.ORG, or maybe someone else here can recommend something specific. Dave -Original Message- From: Pete Ruckelshaus [mailto:[EMAIL PROTECTED] Sent: Friday, August 01, 2008 9:46 AM To: CF-Talk Subject: 2 questions: ensuring a file is only included once, and scrubbing form and url scopes I've got two questions. First: Is there a way to make sure a file is only cfincluded once? I'm using cfinclude to include a UDF library in the onRequestStart() method of my application.cfc, but in my debug output, that file has a file count of 7, which has led me to realize that it's also being included when all of the other cfc and cfm files that go into the page are being called. Second: What method/code do you use to scrub/trim values in the FORM and URL scopes? Thanks Pete ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:310054 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: 2 questions: ensuring a file is only included once, and scrubbing form and url scopes
trim() to trim variables. Pete Ruckelshaus wrote: I've got two questions. First: Is there a way to make sure a file is only cfincluded once? I'm using cfinclude to include a UDF library in the onRequestStart() method of my application.cfc, but in my debug output, that file has a file count of 7, which has led me to realize that it's also being included when all of the other cfc and cfm files that go into the page are being called. Second: What method/code do you use to scrub/trim values in the FORM and URL scopes? Thanks Pete ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:310053 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: 2 questions: ensuring a file is only included once, and scrubbing form and url scopes
First: Is there a way to make sure a file is only cfincluded once? You can set a special variable in the included file and check for it before including it anywhere to ensure it only gets loaded once no matter how many times you call it. In the include: cfset someSpecialVariable = 1 When you include that file: cfif not isDefined(someSpecialVariable) cfinclude template=myInclude.cfm /cfif Second: What method/code do you use to scrub/trim values in the FORM and URL scopes? That depends on the type of data being passed in. For general text fields a trim() will do the job, and you can combine that with other functions to ensure it won't cause a SQL truncation error. For integer values I generally use: cfset url.someID = min(abs(val(trim(url.someID))), 2147483647) This guarantees a positive integer to prevent errors in a variety of places. -Justin Scott ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:310055 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: 2 questions: ensuring a file is only included once, and scrubbing form and url scopes
I try to use functions and CFCs for code that may need to be included more than
once, but I can think of a quick fix if you need to mimic an 'include_once'
process:
at the bottom of your include code create a new unique variable. at the top of
the include code add a cfif not isdefined('[unique variable]') around the
entire code.
This way if the code is run once that variable now exists and won't be run
again.
For the Trimming, I usually use trim(form.[varname]) when I need to remove
leading and trailing spaces
William
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ColdFusion Programmer / Web Developer
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I've got two questions.
First: Is there a way to make sure a file is only cfincluded once? I'm
using cfinclude to include a UDF library in the onRequestStart() method of
my application.cfc, but in my debug output, that file has a file count of 7,
which has led me to realize that it's also being included when all of the
other cfc and cfm files that go into the page are being called.
Second: What method/code do you use to scrub/trim values in the FORM and URL
scopes?
Thanks
Pete
~|
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Re: 2 questions: ensuring a file is only included once, and scrubbing form and url scopes
back in the days of C/C++ we used to do this with header files all the time. inside the included file do: cfif isdefined(include_myfile) is 0 cfset include_myfile=1 !-- do all your foos here --- /cfif that way you won't have to do cfif logic in the parent includer files. ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:310056 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
cfthreads, scopes, cfreport and JVM memory.
Welcome to part three of my asynchronous thread, JVM out-of-memory discussion. To recap: we have a process that creates ~1300, seven to ten page pdf form letters. This is done asynchronously using the cfthread... tag so that each thread can create one letter with associated database transactions and disappear. There was originally a problem with the threads - that once opened, they never closed. This appears to have been resolved yesterday by updating the ColdFusion server from 8.0.0 to 8.0.1. Now the issue is that if the process is allowed to run all at once, all the JVM memory is used up and the system starts throwing out-of-memory errors. The idea I am working with, as suggested in the previous discussion, is to throttle the process so that there are pauses. This should allow time for memory to be cleared between batches. The trouble is that this is not happening. Even with the pauses the memory does not seem to be released until the entire process runs. My theory is that the root thread spawning the child cfthreads is holding onto the memory objects, even the ones created in the child threads, until it is finished. So it can not be cleared until the main thread finishes. Is this logical? How autonomous are variables created in spawned threads? Is the default to create them in a 'thread' scope that is dropped when the child thread is done or in the calling parent thread? Is this somehow controllable? Can I declare the variables to be local to the thread, if so how? Does the 'Var' command work in threads the same as it does in functions to make a variable local? On a related note, the main memory hog is the cfreport... tag. If I comment out this tag, the memory usage only makes a small bump when the test code is run. The question is that we are using the 'filename' property of the cfreport... tag so there is no identified variable to work with here is there? What should be happening with whatever memory ColdFusion used to create the PDF file described in the cfreport... call after it is done with it? !--- BUILD REPORT --- cfreport template=ren.cfr format=pdf overwrite=yes filename=#vOutputFilePath# cfreportparam name=pFirmNo value=#ResultFirms[firmno][threadIndex]# cfreportparam name=pIssueDate value=#DateFormat(pIssueDate, 'mm/dd/yy')# cfreportparam name=pRenewalId value=#vRenewalSeq# /cfreport ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:307659 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: cfthreads, scopes, cfreport and JVM memory.
Yes there is a thread local scope and one can use the 'Var' keyword, but apparently it is somewhat unnecessary. So this just leaves me trying to control the memory used by the cfreport... tag. Instead of writing directly to a file I am putting the cfreport... output into a variable and then attempting to write that file out. This seems to be working for the memory now, the memory is released and cleaned up between each batch during the sleep period to the throttle the report generation. But the files are not actually being written! Should this work? BUILD REPORT --- cfreport template=ren.cfr format=pdf overwrite=yes name=vReportLetter cfreportparam name=pFirmNo value=#ResultFirms[firmno][threadIndex]# cfreportparam name=pIssueDate value=#DateFormat(pIssueDate, 'mm/dd/yy')# cfreportparam name=pRenewalId value=#vRenewalSeq# /cfreport cfset arrayAppend(variables.pdfFiles,vOutputFilePath) cfpdf action=write source=#vReportLetter# destination=#vOutputFilePath# overwrite=yes Or do I just use a cffile action=write... tag. Isn't that just for text files or can I write out binary output like a PDF file? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:307668 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
RE: cfthreads, scopes, cfreport and JVM memory.
Ian, First... I would var any variables used inside the thread. Second, you should be able to write this file using cffile - but I'm not sure why your cfpdf action is not working. But you want to try this code outside your cfthread to see how it behaves - cfthread obscures error information and makes it difficult to troubleshoot :) -mark Mark A. Kruger, CFG, MCSE (402) 408-3733 ext 105 www.cfwebtools.com www.coldfusionmuse.com www.necfug.com -Original Message- From: Ian Skinner [mailto:[EMAIL PROTECTED] Sent: Wednesday, June 18, 2008 10:45 AM To: CF-Talk Subject: Re: cfthreads, scopes, cfreport and JVM memory. Yes there is a thread local scope and one can use the 'Var' keyword, but apparently it is somewhat unnecessary. So this just leaves me trying to control the memory used by the cfreport... tag. Instead of writing directly to a file I am putting the cfreport... output into a variable and then attempting to write that file out. This seems to be working for the memory now, the memory is released and cleaned up between each batch during the sleep period to the throttle the report generation. But the files are not actually being written! Should this work? BUILD REPORT --- cfreport template=ren.cfr format=pdf overwrite=yes name=vReportLetter cfreportparam name=pFirmNo value=#ResultFirms[firmno][threadIndex]# cfreportparam name=pIssueDate value=#DateFormat(pIssueDate, 'mm/dd/yy')# cfreportparam name=pRenewalId value=#vRenewalSeq# /cfreport cfset arrayAppend(variables.pdfFiles,vOutputFilePath) cfpdf action=write source=#vReportLetter# destination=#vOutputFilePath# overwrite=yes Or do I just use a cffile action=write... tag. Isn't that just for text files or can I write out binary output like a PDF file? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:307677 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: cfthreads, scopes, cfreport and JVM memory.
Mark Kruger wrote: Ian, First... I would var any variables used inside the thread. Second, you should be able to write this file using cffile - but I'm not sure why your cfpdf action is not working. But you want to try this code outside your cfthread to see how it behaves - cfthread obscures error information and makes it difficult to troubleshoot :) -mark Yeah, that finally tracked down the problem to incorrect pound signs in the cfpdf... tag. The source parameter just needs that string of the the PDF variable not to process it as a variable. That is one of the inconsistencies of CF that trips me up most often. When to just use the string of the variable and when not to in tag parameters. Now I am struggling with how threads and memory usage work together. I think I may be bouncing around a bug, at least some type of unexpected (for me at least) behavior. So far it seems to center around writing PDF content to files. When I straightened out the cfpdf... tag, so that it works correctly, I am again experiencing the phenomenon where JVM memory usage will just climb and climb with each iteration of PDF generation until the master thread is finished or the memory is full and CF starts throwing exceptions. The same thing happened when the cfreport... tag directly wrote the PDF content it generates to a file. The whole point of this is the create ~1300 multiple page pdf form letters that we know will not all fit into memory at once. How can we control this so that the process can be allowed to finish? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:307680 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: cfthreads, scopes, cfreport and JVM memory.
Hi Ian You say that you are throttling the process to create a pause between batches. Is your throttle part of the function that creates the threads? (Given that you say that memory isn't released until this function completes, this probably wouldn't help.) Look at things another way - if cfthread didn't exist, you would probably be using cfschedule to throttle the process - ie create PDFs 1 - 20, then 21 - 40, and so on. Can you cfschedule your function (that creates all 1300 threads) in batches, so that this function has a chance to complete (and theoretically release the memory that it's threads consume)? Still use threads within this function, but if you only process 20 threads at a time, this might help. Antony On Thu, Jun 19, 2008 at 5:04 AM, Ian Skinner [EMAIL PROTECTED] wrote: The whole point of this is the create ~1300 multiple page pdf form letters that we know will not all fit into memory at once. How can we control this so that the process can be allowed to finish? ~| Adobe® ColdFusion® 8 software 8 is the most important and dramatic release to date Get the Free Trial http://ad.doubleclick.net/clk;203748912;27390454;j Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:307699 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Scary fun with variables scopes.
Give this a try if you have a moment. Put this code in a file test.cfm. Note: no cfapplication tag. cfoutputSession.test: #session.test#/cfoutput cfif session.test EQ true Session Variable evaluated true. /cfif Then call the page with this url: http://aDomain/test.cfm?session.test=true Is this discussed or documented somewhere? ~| Get involved in the latest ColdFusion discussions, product development sharing, and articles on the Adobe Labs wiki. http://labs/adobe.com/wiki/index.php/ColdFusion_8 Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290343 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
RE: Scary fun with variables scopes.
Ian, ColdFusion is evaluating the line cfif session.test EQ true and is looking through all known scopes and is finding URL['session.text'], treating it as a variable name, which is evaluating to true. Ben Nadel discussed this type of non-assertive scope reference in a recent blog post (http://www.bennadel.com/blog/957-Code-Assertively.htm). HTH, Rich Kroll ~| Download the latest ColdFusion 8 utilities including Report Builder, plug-ins for Eclipse and Dreamweaver updates. http;//www.adobe.com/cfusion/entitlement/index.cfm?e=labs%5adobecf8%5Fbeta Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290355 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
add this: cfoutput#isSimpleValue(session.test)#/cfoutput -- YES cfdump var=#session# -- error which is weird because as of CFMX, creating a variable with a dot in the name will implicitly create a struct (soo cfset foo.bar = 123 / would create a struct named 'foo' with a key named 'bar' and equal to 123). I guess the fact that 'session' is a reserved word prohibits CF from creating it as a struct so you get a simple value of session.test equal to 'true'. so basically the bottom line is... you're not manipulating the session (which doesn't even exist). On 10/5/07, Ian Skinner [EMAIL PROTECTED] wrote: Give this a try if you have a moment. Put this code in a file test.cfm. Note: no cfapplication tag. cfoutputSession.test: #session.test#/cfoutput cfif session.test EQ true Session Variable evaluated true. /cfif Then call the page with this url: http://aDomain/test.cfm?session.test=true Is this discussed or documented somewhere? ~| Create robust enterprise, web RIAs. Upgrade to ColdFusion 8 and integrate with Adobe Flex http://www.adobe.com/products/coldfusion/flex2/?sdid=RVJP Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290356 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
Does this work for anyone if the variable name is something other than session? a href=test.cfm?test.foo=bartest.bar=fooid=2Test/a ~| Get the answers you are looking for on the ColdFusion Labs Forum direct from active programmers and developers. http://www.adobe.com/cfusion/webforums/forum/categories.cfm?forumid-72catid=648 Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290362 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Scary fun with variables scopes.
I tried it, and dumped session: test is not there, you must have created another struct named session, I tried dumping variables it is not there? On 10/5/07, Ian Skinner [EMAIL PROTECTED] wrote: Give this a try if you have a moment. Put this code in a file test.cfm. Note: no cfapplication tag. cfoutputSession.test: #session.test#/cfoutput cfif session.test EQ true Session Variable evaluated true. /cfif Then call the page with this url: http://aDomain/test.cfm?session.test=true Is this discussed or documented somewhere? ~| Enterprise web applications, build robust, secure scalable apps today - Try it now ColdFusion Today ColdFusion 8 beta - Build next generation apps Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290365 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
I don't think its a structure. Just a variable name with a . in it. Nm. I see Charlie Griefer already explained that :) ~| Get the answers you are looking for on the ColdFusion Labs Forum direct from active programmers and developers. http://www.adobe.com/cfusion/webforums/forum/categories.cfm?forumid-72catid=648 Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290370 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Scary fun with variables scopes.
seems it creates a struct called session in the url scope: cfdump var=#url# / On 10/5/07, Ron Gowen [EMAIL PROTECTED] wrote: I tried it, and dumped session: test is not there, you must have created another struct named session, I tried dumping variables it is not there? On 10/5/07, Ian Skinner [EMAIL PROTECTED] wrote: Give this a try if you have a moment. Put this code in a file test.cfm. Note: no cfapplication tag. cfoutputSession.test: #session.test#/cfoutput cfif session.test EQ true Session Variable evaluated true. /cfif Then call the page with this url: http://aDomain/test.cfm?session.test=truehttp://adomain/test.cfm?session.test=true Is this discussed or documented somewhere? ~| Get the answers you are looking for on the ColdFusion Labs Forum direct from active programmers and developers. http://www.adobe.com/cfusion/webforums/forum/categories.cfm?forumid-72catid=648 Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290367 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
I tried it, and dumped session: test is not there, you must have created another struct named session, I tried dumping variables it is not there? Its not a structure, but you'll see it if you dump the url scope. ~| Get involved in the latest ColdFusion discussions, product development sharing, and articles on the Adobe Labs wiki. http://labs/adobe.com/wiki/index.php/ColdFusion_8 Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290366 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
seems it creates a struct called session in the url scope: cfdump var=#url# / I don't think its a structure. Just a variable name with a . in it. ~| ColdFusion 8 - Build next generation apps today, with easy PDF and Ajax features - download now http://download.macromedia.com/pub/labs/coldfusion/cf8_beta_whatsnew_052907.pdf Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290369 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
I don't think its a structure. Just a variable name with a . in it. But this is unconsistent with the way CF really works: Try CFSET test.test = 0 CFDUMP var=#test# CFDUMP shows that test is a structure with a variable test, not a variable test.test -- ___ REUSE CODE! Use custom tags; See http://www.contentbox.com/claude/customtags/tagstore.cfm (Please send any spam to this address: [EMAIL PROTECTED]) Thanks. ~| ColdFusion is delivering applications solutions at at top companies around the world in government. Find out how and where now http://www.adobe.com/cfusion/showcase/index.cfm?event=finderproductID=1522loc=en_us Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290385 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
Re: Scary fun with variables scopes.
But this is unconsistent with the way CF really works: Try CFSET test.test = 0 CFDUMP var=#test# CFDUMP shows that test is a structure with a variable test, not a variable test.test But I guess that's the point. Its not a structure in this case. Dump #URL# and the value is not shown as a structure. Its a simple value ie test.test. ~| Download the latest ColdFusion 8 utilities including Report Builder, plug-ins for Eclipse and Dreamweaver updates. http;//www.adobe.com/cfusion/entitlement/index.cfm?e=labs%5adobecf8%5Fbeta Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290386 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
But I guess that's the point. Its not a structure in this case. Dump #URL# and the value is not shown as a structure. Its a simple value ie test.test. That's not only the point, it is also an issue, since in theory, variable cannot have dots in their names. So CF is actually creating an illegal variable... what a shame! ~| ColdFusion 8 - Build next generation apps today, with easy PDF and Ajax features - download now http://download.macromedia.com/pub/labs/coldfusion/cf8_beta_whatsnew_052907.pdf Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290395 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4
RE: Scary fun with variables scopes.
I don't think its a structure. Just a variable name with a . in it. But this is unconsistent with the way CF really works: Try CFSET test.test = 0 CFDUMP var=#test# CFDUMP shows that test is a structure with a variable test, not a variable test.test The way CF really works in the example you provided is implicitly creating a structure when you use that syntax. In the previous example, since session is an existing structure CF cannot create it so it treats it as a variable session.test that it places into the URL scope. You can test this behavior by running the code below: cfset tester.testme = 'i am alive' / !--- creates a structure --- cfdump var=#tester# cfdump var=#url# If you place these in a file (test.cfm) and browse them with the following urls: Test.cfm Test.cfm?tester.test=1 You will see that the exact same phenomenon occurs; when the struct already exists, CF cannot implicitly create it and creates a variable with the name provided. HTH, Rich Kroll ~| Get involved in the latest ColdFusion discussions, product development sharing, and articles on the Adobe Labs wiki. http://labs/adobe.com/wiki/index.php/ColdFusion_8 Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290399 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
CF cannot create it so it treats it as a variable session.test that it places into the URL scope. And this is what is inconsistent, since a variable cannot have a dot in its name. -- ___ REUSE CODE! Use custom tags; See http://www.contentbox.com/claude/customtags/tagstore.cfm (Please send any spam to this address: [EMAIL PROTECTED]) Thanks. ~| Enterprise web applications, build robust, secure scalable apps today - Try it now ColdFusion Today ColdFusion 8 beta - Build next generation apps Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290414 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
You will see that the exact same phenomenon occurs; when the struct already exists, CF cannot implicitly create it and creates a variable with the name provided. It doesn't seem to matter whether a structure exists or not. ~| Get involved in the latest ColdFusion discussions, product development sharing, and articles on the Adobe Labs wiki. http://labs/adobe.com/wiki/index.php/ColdFusion_8 Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290415 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Re: Scary fun with variables scopes.
You can, of course, protect yourself from this: cfif StructKeyExists(session, test) AND session.test EQ true Session Variable evaluated true. /cfif On 10/5/07, Ian Skinner [EMAIL PROTECTED] wrote: Give this a try if you have a moment. Put this code in a file test.cfm. Note: no cfapplication tag. cfoutputSession.test: #session.test#/cfoutput cfif session.test EQ true Session Variable evaluated true. /cfif Then call the page with this url: http://aDomain/test.cfm?session.test=true Is this discussed or documented somewhere? -- mxAjax / CFAjax docs and other useful articles: http://www.bifrost.com.au/blog/ ~| Download the latest ColdFusion 8 utilities including Report Builder, plug-ins for Eclipse and Dreamweaver updates. http;//www.adobe.com/cfusion/entitlement/index.cfm?e=labs%5adobecf8%5Fbeta Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:290420 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
Speaking of Scopes (was Re: Scope Memory)
Application scope only exists once per application. Session exists once for each user. You might get away with bloated memory usage in application, but if you are not careful what you place in session your problem can very quickly multiply. On that note I have a question - I am looking into building an app that my company will be selling to customers to use in a shared environment. It's starting out as a CMS but is going to include a LOT of user controls and module support. The idea is that each domain will have an Application name based on the domain which will then call a shared CFC to create a memory cached version of the site in the Application scope. Then, as the pages in the CMS are called the engine does not have to call out to the database, rather it simply references the version that is cached in the application scope. At least, that's the way I'm thinking of doing it... what I wonder is how the server performance will be with 100-150 sites running, each with their own application and different things going on. Understand, these are what I'd call mid-traffic sites but for the moment all brochureware. The point of my question - would it make more sense to have the necessary bits to connect to the database and pull the page content on request stored in memory or just have the entire page content already in memory after being loaded on the first page vistit when the application reloads? ~| Create robust enterprise, web RIAs. Upgrade integrate Adobe Coldfusion MX7 with Flex 2 http://www.adobe.com/products/coldfusion/flex2/?sdid=RVJP Archive: http://www.houseoffusion.com/groups/CF-Talk/message.cfm/messageid:279357 Subscription: http://www.houseoffusion.com/groups/CF-Talk/subscribe.cfm Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4
evaluation order of CF scopes
I was just thumbing through my CFMX7 Developer Exam StudyGuide and there is a section that lists the evaluation order of the scopes of CF. Something is bugging me though - when does application. session. server. request. get evaluated? -- Duncan I Loxton www.sixfive.co.uk http://www.sixfive.co.uk [EMAIL PROTECTED] I can only please one person per day. Today is not looking good. Tomorrow isn't looking much better. Dilbert ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:221414 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: evaluation order of CF scopes
I believe those scopes need to be explicitly ...um...scoped :) e.g. cfset application.foo = bar / cfoutput#bar#/cfoutput will result in an error, since CF hunts thru the specific scopes (query, arguments, variables, cgi, url, form, client) and does not encounter 'bar' in any of them. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: I was just thumbing through my CFMX7 Developer Exam StudyGuide and there is a section that lists the evaluation order of the scopes of CF. Something is bugging me though - when does application. session. server. request. get evaluated? -- Duncan I Loxton www.sixfive.co.uk http://www.sixfive.co.uk [EMAIL PROTECTED] I can only please one person per day. Today is not looking good. Tomorrow isn't looking much better. Dilbert ~| Find out how CFTicket can increase your company's customer support efficiency by 100% http://www.houseoffusion.com/banners/view.cfm?bannerid=49 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:221415 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: evaluation order of CF scopes
Charlie, You mean: cfset application.foo = bar / cfoutput#foo#/cfoutput although they'll both throw the same exception. Duncan, one of my favorite spots in the livedocs (well, it was until i memorized it all...) is this one, dealing directly with your question: http://livedocs.macromedia.com/coldfusion/7/htmldocs/0911.htm Though, I think i like the one from cfmx 6.0 better: http://livedocs.macromedia.com/coldfusion/6/Developing_ColdFusion_MX_Applications_with_CFML/Variables7.htm -nathan strutz http://www.dopefly.com/ On 10/18/05, Charlie Griefer [EMAIL PROTECTED] wrote: I believe those scopes need to be explicitly ...um...scoped :) e.g. cfset application.foo = bar / cfoutput#bar#/cfoutput will result in an error, since CF hunts thru the specific scopes (query, arguments, variables, cgi, url, form, client) and does not encounter 'bar' in any of them. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: I was just thumbing through my CFMX7 Developer Exam StudyGuide and there is a section that lists the evaluation order of the scopes of CF. Something is bugging me though - when does application. session. server. request. get evaluated? -- Duncan I Loxton www.sixfive.co.uk http://www.sixfive.co.uk [EMAIL PROTECTED] I can only please one person per day. Today is not looking good. Tomorrow isn't looking much better. Dilbert ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:221416 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: evaluation order of CF scopes
ok so these particular scopes dont get searched through if an unamed var is present. Do I also understand that if you do this: cfset foo = bar / cfoutput#foo#/cfoutput a) foo is actually sitting in the variables scope? b) and that foo is only available to - child templates included with cfinclude and - this current template Is this correct? On 10/19/05, Nathan Strutz [EMAIL PROTECTED] wrote: Charlie, You mean: cfset application.foo = bar / cfoutput#foo#/cfoutput although they'll both throw the same exception. Duncan, one of my favorite spots in the livedocs (well, it was until i memorized it all...) is this one, dealing directly with your question: http://livedocs.macromedia.com/coldfusion/7/htmldocs/0911.htm Though, I think i like the one from cfmx 6.0 better: http://livedocs.macromedia.com/coldfusion/6/Developing_ColdFusion_MX_Applications_with_CFML/Variables7.htm -nathan strutz http://www.dopefly.com/ On 10/18/05, Charlie Griefer [EMAIL PROTECTED] wrote: I believe those scopes need to be explicitly ...um...scoped :) e.g. cfset application.foo = bar / cfoutput#bar#/cfoutput will result in an error, since CF hunts thru the specific scopes (query, arguments, variables, cgi, url, form, client) and does not encounter 'bar' in any of them. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: I was just thumbing through my CFMX7 Developer Exam StudyGuide and there is a section that lists the evaluation order of the scopes of CF. Something is bugging me though - when does application. session. server. request. get evaluated? -- Duncan I Loxton www.sixfive.co.uk http://www.sixfive.co.uk http://www.sixfive.co.uk [EMAIL PROTECTED] I can only please one person per day. Today is not looking good. Tomorrow isn't looking much better. Dilbert ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:221432 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: evaluation order of CF scopes
Yeah, cfset foo = bar / is making a variable named foo within the variables scope. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: ok so these particular scopes dont get searched through if an unamed var is present. Do I also understand that if you do this: cfset foo = bar / cfoutput#foo#/cfoutput a) foo is actually sitting in the variables scope? b) and that foo is only available to - child templates included with cfinclude and - this current template Is this correct? On 10/19/05, Nathan Strutz [EMAIL PROTECTED] wrote: Charlie, You mean: cfset application.foo = bar / cfoutput#foo#/cfoutput although they'll both throw the same exception. Duncan, one of my favorite spots in the livedocs (well, it was until i memorized it all...) is this one, dealing directly with your question: http://livedocs.macromedia.com/coldfusion/7/htmldocs/0911.htm Though, I think i like the one from cfmx 6.0 better: http://livedocs.macromedia.com/coldfusion/6/Developing_ColdFusion_MX_Applications_with_CFML/Variables7.htm -nathan strutz http://www.dopefly.com/ On 10/18/05, Charlie Griefer [EMAIL PROTECTED] wrote: I believe those scopes need to be explicitly ...um...scoped :) e.g. cfset application.foo = bar / cfoutput#bar#/cfoutput will result in an error, since CF hunts thru the specific scopes (query, arguments, variables, cgi, url, form, client) and does not encounter 'bar' in any of them. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: I was just thumbing through my CFMX7 Developer Exam StudyGuide and there is a section that lists the evaluation order of the scopes of CF. Something is bugging me though - when does application. session. server. request. get evaluated? -- Duncan I Loxton www.sixfive.co.uk http://www.sixfive.co.uk http://www.sixfive.co.uk http://www.sixfive.co.uk [EMAIL PROTECTED] I can only please one person per day. Today is not looking good. Tomorrow isn't looking much better. Dilbert ~| Find out how CFTicket can increase your company's customer support efficiency by 100% http://www.houseoffusion.com/banners/view.cfm?bannerid=49 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:221434 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
RE: evaluation order of CF scopes
foo would also be available to custom tags and templates included using CFMODULE in the caller scope (caller.foo). Another scope not mentioned yet is request in which variables are available throughout the life of a single request as request.varname regardless if it's called from the same page, an included page, or a custom tag/module. Request variables must be scoped (like application/session) IIRC. -Justin -Original Message- From: Duncan [mailto:[EMAIL PROTECTED] Sent: Tuesday, October 18, 2005 10:52 PM To: CF-Talk Subject: Re: evaluation order of CF scopes ok so these particular scopes dont get searched through if an unamed var is present. Do I also understand that if you do this: cfset foo = bar / cfoutput#foo#/cfoutput a) foo is actually sitting in the variables scope? b) and that foo is only available to - child templates included with cfinclude and - this current template Is this correct? On 10/19/05, Nathan Strutz [EMAIL PROTECTED] wrote: Charlie, You mean: cfset application.foo = bar / cfoutput#foo#/cfoutput although they'll both throw the same exception. Duncan, one of my favorite spots in the livedocs (well, it was until i memorized it all...) is this one, dealing directly with your question: http://livedocs.macromedia.com/coldfusion/7/htmldocs/0911.htm Though, I think i like the one from cfmx 6.0 better: http://livedocs.macromedia.com/coldfusion/6/Developing_ColdFus ion_MX_Applications_with_CFML/Variables7.htm -nathan strutz http://www.dopefly.com/ On 10/18/05, Charlie Griefer [EMAIL PROTECTED] wrote: I believe those scopes need to be explicitly ...um...scoped :) e.g. cfset application.foo = bar / cfoutput#bar#/cfoutput will result in an error, since CF hunts thru the specific scopes (query, arguments, variables, cgi, url, form, client) and does not encounter 'bar' in any of them. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: I was just thumbing through my CFMX7 Developer Exam StudyGuide and there is a section that lists the evaluation order of the scopes of CF. Something is bugging me though - when does application. session. server. request. get evaluated? -- Duncan I Loxton www.sixfive.co.uk http://www.sixfive.co.uk http://www.sixfive.co.uk [EMAIL PROTECTED] I can only please one person per day. Today is not looking good. Tomorrow isn't looking much better. Dilbert ~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:221435 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: evaluation order of CF scopes
I forgot to mention, I typically will just refer to anything within the variables scope with the scope prefixed. So in your exampled I would do cfset foo = bar /cfoutput#Variables.foo#/cfoutput I have gotten into this happen due to years of working with other peoples code who hardly scope much of anything and make it a little harder to debug errors when trying to figure out where foo came in from. On 10/18/05, Aaron Rouse [EMAIL PROTECTED] wrote: Yeah, cfset foo = bar / is making a variable named foo within the variables scope. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: ok so these particular scopes dont get searched through if an unamed var is present. Do I also understand that if you do this: cfset foo = bar / cfoutput#foo#/cfoutput a) foo is actually sitting in the variables scope? b) and that foo is only available to - child templates included with cfinclude and - this current template Is this correct? On 10/19/05, Nathan Strutz [EMAIL PROTECTED] wrote: Charlie, You mean: cfset application.foo = bar / cfoutput#foo#/cfoutput although they'll both throw the same exception. Duncan, one of my favorite spots in the livedocs (well, it was until i memorized it all...) is this one, dealing directly with your question: http://livedocs.macromedia.com/coldfusion/7/htmldocs/0911.htm Though, I think i like the one from cfmx 6.0 better: http://livedocs.macromedia.com/coldfusion/6/Developing_ColdFusion_MX_Applications_with_CFML/Variables7.htm -nathan strutz http://www.dopefly.com/ On 10/18/05, Charlie Griefer [EMAIL PROTECTED] wrote: I believe those scopes need to be explicitly ...um...scoped :) e.g. cfset application.foo = bar / cfoutput#bar#/cfoutput will result in an error, since CF hunts thru the specific scopes (query, arguments, variables, cgi, url, form, client) and does not encounter 'bar' in any of them. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: I was just thumbing through my CFMX7 Developer Exam StudyGuide and there is a section that lists the evaluation order of the scopes of CF. Something is bugging me though - when does application. session. server. request. get evaluated? -- Duncan I Loxton www.sixfive.co.uk http://www.sixfive.co.uk http://www.sixfive.co.uk http://www.sixfive.co.uk [EMAIL PROTECTED] I can only please one person per day. Today is not looking good. Tomorrow isn't looking much better. Dilbert ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:221437 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: evaluation order of CF scopes
i second Aaron, but i'd take it a step further and scope the variable when setting it. cfset variables.foo = bar / while there are (rare) occassions when you actually don't want to scope variables, they're few and far between. a general rule of thumb is to scope all of your variables. including the local (variables) scope. On 10/18/05, Aaron Rouse [EMAIL PROTECTED] wrote: I forgot to mention, I typically will just refer to anything within the variables scope with the scope prefixed. So in your exampled I would do cfset foo = bar /cfoutput#Variables.foo#/cfoutput I have gotten into this happen due to years of working with other peoples code who hardly scope much of anything and make it a little harder to debug errors when trying to figure out where foo came in from. On 10/18/05, Aaron Rouse [EMAIL PROTECTED] wrote: Yeah, cfset foo = bar / is making a variable named foo within the variables scope. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: ok so these particular scopes dont get searched through if an unamed var is present. Do I also understand that if you do this: cfset foo = bar / cfoutput#foo#/cfoutput a) foo is actually sitting in the variables scope? b) and that foo is only available to - child templates included with cfinclude and - this current template Is this correct? On 10/19/05, Nathan Strutz [EMAIL PROTECTED] wrote: Charlie, You mean: cfset application.foo = bar / cfoutput#foo#/cfoutput although they'll both throw the same exception. Duncan, one of my favorite spots in the livedocs (well, it was until i memorized it all...) is this one, dealing directly with your question: http://livedocs.macromedia.com/coldfusion/7/htmldocs/0911.htm Though, I think i like the one from cfmx 6.0 better: http://livedocs.macromedia.com/coldfusion/6/Developing_ColdFusion_MX_Applications_with_CFML/Variables7.htm -nathan strutz http://www.dopefly.com/ On 10/18/05, Charlie Griefer [EMAIL PROTECTED] wrote: I believe those scopes need to be explicitly ...um...scoped :) e.g. cfset application.foo = bar / cfoutput#bar#/cfoutput will result in an error, since CF hunts thru the specific scopes (query, arguments, variables, cgi, url, form, client) and does not encounter 'bar' in any of them. On 10/18/05, Duncan [EMAIL PROTECTED] wrote: I was just thumbing through my CFMX7 Developer Exam StudyGuide and there is a section that lists the evaluation order of the scopes of CF. Something is bugging me though - when does application. session. server. request. get evaluated? -- Duncan I Loxton www.sixfive.co.uk http://www.sixfive.co.uk http://www.sixfive.co.uk http://www.sixfive.co.uk [EMAIL PROTECTED] I can only please one person per day. Today is not looking good. Tomorrow isn't looking much better. Dilbert ~| Discover CFTicket - The leading ColdFusion Help Desk and Trouble Ticket application http://www.houseoffusion.com/banners/view.cfm?bannerid=48 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:221438 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: evaluation order of CF scopes
Lately I have been swaying on doing this myself. I do it for obvious reasons within CFCs but have yet to completely make the jump on other pages. I have been trying to focus more on naming conventions. For years I have prefixed structures with stc, queries with qry and arrays with ary but never bothered for just strings, lists, and so on. On 10/18/05, Charlie Griefer [EMAIL PROTECTED] wrote: i second Aaron, but i'd take it a step further and scope the variable when setting it. cfset variables.foo = bar / while there are (rare) occassions when you actually don't want to scope variables, they're few and far between. a general rule of thumb is to scope all of your variables. including the local (variables) scope. ~| Logware (www.logware.us): a new and convenient web-based time tracking application. Start tracking and documenting hours spent on a project or with a client with Logware today. Try it for free with a 15 day trial account. http://www.houseoffusion.com/banners/view.cfm?bannerid=67 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:221439 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
SECRET CF SCOPES DISCOVERED IN AN ASTEROID
In an amazing, three (1) year investigation full of intrigue, corporate shuffling and clown beatings - five (7) new ColdFusion scopes were found written on the inside of a Martian asteroid found in the Arctic tundra of Wisconsin. Lead investigator and main scientist, Patty O'Doar, released this statement today at a press conference held outside the Center for Outer Space Training and Cool Objects (COSTCO). It's pretty cool. Pretty cool, indeed. After finding these secret scopes, the scientists used the latest DNA testing, carbon dating and mood ring technology known to mankind to identify, and categorize these Earth-shattering discoveries. While these naming conventions may look vaguely familiar, like those of subatomic quarks, their names were carefully chosen to describe their purpose in emerging Third World countries. ScopePurpose - PERA This scope contains information about the server environment that is usually beyond what a developer can normally access. For example, you can determine what the temperature in the room is, what type of soda the DBA is drinking or who farted. TELA Ever spent hours trying to figure out where that elusive bug is when reviewing the code of some moron who can't use a basic methodology? Assigning variables to this scope will allow you zoom right into the source of the problem. STETHA Variables in this scope will provide info on the status of your system. Since the hardware of servers is the heartbeat of any organization, being able to tell at a glance how everything is performing can be critical. JYRA Perhaps the most amazing new scope to be discovered, Jyra variables, when used correctly, will prevent your site from ever toppling due to hacker attacks, service outages, or hardware failures. COLADA The most destructive of the new scopes. To use a physics analogy, it's the anti-Jyra scope. Any attempted use of variables in this scope has rendered the server inoperable due to catastrophic fragmenting of the hard drive sectors. Any attempts to defragment causes irreversible failure. Disclaimer -- I know this belongs on any other list than CF-Talk but it's the only one I subscribe to and since I was too lazy to go ahead and sign up for it, I release it here and await the flames. It's been a long week - can't you tell? ~| Find out how CFTicket can increase your company's customer support efficiency by 100% http://www.houseoffusion.com/banners/view.cfm?bannerid=49 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:198506 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Variable Session scopes
What is the best way of creating variable session scopes called from a global vars page without CF chucking errors.. global vars page cfscript request.sessionVar = mySite; // This changes across the mini sites request.dbsitePrefix = test; /cfscript Application.cfm Page - and yes sessionmanagement is on cfif Not IsDefined(SESSION[request.sessionVar]) cfscript SESSION[request.sessionVar] = StructNew(); SESSION[request.sessionVar].USERNAME = ; SESSION[request.sessionVar].OBJECTID = ; SESSION[request.sessionVar].USER_LOGGEDIN = false; SESSION[request.sessionVar].Agree = False; /cfscript /cfif cfif NOT SESSION[request.sessionVar].USER_LOGGEDIN cflocation addtoken=no url=signin.cfm /cfif The error I get is Element USER_LOGGEDIN is undefined in a CFML structure referenced as part of an expression, plus other pages throughout the site which have other similar things Test.cfm cfif NOT SESSION[request.sessionVar].Agree cflocation addtoken=no url=index.cfm /cfif Thanks Carl ~| Purchase from House of Fusion, a Macromedia Authorized Affiliate and support the CF community. http://www.houseoffusion.com/banners/view.cfm?bannerid=34 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:182791 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=89.70.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
Re: Variable Session scopes
Carl V wrote: What is the best way of creating variable session scopes called from a global vars page without CF chucking errors.. global vars page cfscript request.sessionVar = mySite; // This changes across the mini sites request.dbsitePrefix = test; /cfscript Application.cfm Page - and yes sessionmanagement is on cfif Not IsDefined(SESSION[request.sessionVar]) cfscript SESSION[request.sessionVar] = StructNew(); SESSION[request.sessionVar].USERNAME = ; SESSION[request.sessionVar].OBJECTID = ; SESSION[request.sessionVar].USER_LOGGEDIN = false; SESSION[request.sessionVar].Agree = False; /cfscript /cfif Its probably worth copying your session variable to a local variable, so that you don't keep hitting the session and to make it easier to access your variables. request.thisSession = duplicate(session[request.sessionVar]); This way your login references will be request.thisSession.Username/ObjectID/user_LoggedIn You will need to remember to copy the thisSession variable back into session[request.sessionVar] at the end of the request, just in case any changes were made. Hope this helps Regards Stephen ~| Purchase from House of Fusion, a Macromedia Authorized Affiliate and support the CF community. http://www.houseoffusion.com/banners/view.cfm?bannerid=36 Message: http://www.houseoffusion.com/lists.cfm/link=i:4:182792 Archives: http://www.houseoffusion.com/cf_lists/threads.cfm/4 Subscription: http://www.houseoffusion.com/lists.cfm/link=s:4 Unsubscribe: http://www.houseoffusion.com/cf_lists/unsubscribe.cfm?user=11502.10531.4 Donations Support: http://www.houseoffusion.com/tiny.cfm/54
