If I understand the question, you're asking why use request.xxx when xxx does just as
well?
I think the argument here is that it's supposed to be good programming style to
separate variables into different scopes, thus preventing you accidentally addressing
the wrong scope. The 'rule' I think is that all the variables you use should be in a
meaningful scope (in CF's case a structure).
The best example I can think of is a web form that edits, say, a user record in the
database. Following submission of the form, you might have a number of distinct
collections of data associated with the user
- the original unchanged values
- the values that include unvalidated changes from the form
- the validated set of data (that would have 10000 instead of 10,000 and so on).
The easiest way to juggle these 3 sets of data is via different scopes. So the
example here would have user.blah, form.blah and formValidated.blah - 3 different
values for the same piece of data, but much easier to follow than giving them the same
name in a different scope.
----- Original Message -----
From: Matt Horn
To: [EMAIL PROTECTED]
Sent: Wednesday, November 05, 2003 9:45 AM
Subject: Re: [ cf-dev ] Request scope
My question is this
why do you NEED or WANT to copy from session to Request when
<cflock scope="session" timeout="10">
<cfset userId= session.userId>
<cfset productionhouseId = session.productionhouseId>
</cflock>
works as well
----- Original Message -----
From: "Robertson-Ravo, Neil (RX)" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Wednesday, November 05, 2003 11:35 AM
Subject: RE: [ cf-dev ] Request scope
> Not sure what your question is..but then again I have had hardly any sleep
> ;-) but if it's a way of copying back and forth between the request and
> session scope..this should work (and there are even easier ways!)
>
> <cfparam name="attributes.action" default="session2request"><!--- required
> --->
>
> <cfswitch expression="#attributes.action#">
> <!--- add session variables to the request scope --->
> <cfcase value="session2request">
> <cflock scope="SESSION" type="READONLY" timeout="15">
> <cfloop collection="#session#" item="key">
> <cfset request[key] = session[key]>
> </cfloop>
> </cflock></cfcase>
>
> <!--- add request variables to the session scope --->
> <cfcase value="request2session">
> <!--- remove request variables that should not be added to
> the Session scope --->
> <cfset excludeList = "hideScript,hideTimeScript">
> <cfloop list="#excludeList#" index="i">
> <cfset StructDelete(request, i)>
> </cfloop>
>
> <cfloop collection="#request#" item="key">
> <cflock scope="SESSION" type="EXCLUSIVE"
> timeout="15">
> <cfset session[key] = request[key]>
> </cflock>
> </cfloop></cfcase>
>
> <cfdefaultcase>
> The "action" ATTRIBUTE you have passed in is invalid.
> <cfabort></cfdefaultcase>
> </cfswitch>
>
>
>
>
>
>
> -----Original Message-----
> From: Matt Horn [mailto:[EMAIL PROTECTED]
> Sent: 05 November 2003 09:35
> To: [EMAIL PROTECTED]
> Subject: [ cf-dev ] Request scope
>
> Hi
>
> for as long as I have been writing Cold fusion code I have done this:
> <cflock scope="session" timeout="10">
> <cfset request.userId= session.userId>
> <cfset request.productionhouseId = session.productionhouseId>
</cflock>
> but everything works fine without the request scope
>
> <cflock scope="session" timeout="10">
> <cfset userId= session.userId>
> <cfset productionhouseId = session.productionhouseId> </cflock>
>
>
> so my question is this
>
> Am I correct in setting session variables down to Request scope
>
> or will the other way work just as well?
> and if so .. why even have a request scope?
>
> Matt *Newbie
>
>
>
> |\--------------------/|
> Matt Horn
> Web Applications Developer
> Ph:+2782 424 3751
> W: http://www.matt-horn.org
> E:[EMAIL PROTECTED]
> |\--------------------/|
>
> --
> ** Archive: http://www.mail-archive.com/dev%40lists.cfdeveloper.co.uk/
>
> To unsubscribe, e-mail: [EMAIL PROTECTED]
> For additional commands, e-mail: [EMAIL PROTECTED]
> For human help, e-mail: [EMAIL PROTECTED]
>
--
** Archive: http://www.mail-archive.com/dev%40lists.cfdeveloper.co.uk/
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
For human help, e-mail: [EMAIL PROTECTED]
