RE: [CFCDev] MVC and GetPageContext.Forward()

Anthony Israel-Davis Wed, 15 Jun 2005 09:57:46 -0700

Getting back to you a bit late, but here’s how we would implement similar code using cfinclude:

EXAMPLE:

(SEMI-PSEUDO CODE)

(“action” page)

<!--- do some validation based on business need – required fields, valid format, etc.--- >

Do some more logic (db insert, etc.)

<cfinclude template=”dsp_thank_you.cfm”> // body text for “thank you” page.

<cfinclude template=”dsp_form.cfm”> // dsp_form only has the code between <form> tags.

</cfif>

(END)

I find this useful when we have the same form for different uses. For instance, we may have an “add person” and an “edit person” - same form, one with data one without. The other reason this is useful for us is that there is a template custom tag that surround the body, so we just switch the body out based on the validation routine. Another thing we do at times is ONLY display the invalid form fields for the user, but that is a slightly more complicated thing.

The include has access to the variables of the calling page (in this case “form” scope variables) without having to set them in the request scope, which is what prompted my original question. I think I was missing the page flow when I first looked at the code

Anthony

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On Behalf Of Peter H
Sent: Tuesday, June 14, 2005 4:13 PM
To: [email protected]
Subject: RE: [CFCDev] MVC and GetPageContext.Forward()

Hi Anthony,

When I was looking into validation using coldfusion, I found many references to using cfinlcudes but couldn't find an example of it anywhere.

The approach used here came about simply because I couldn't think of a better way to cleanly seperate the form itself from the validation.

Theres bound to be advantages and disadvantages to both so If you have an example of using cfincludes for validation could you post it for me.

Any body else have views on this?

Cheers, Pete (aka lad4bear)

----Original Message Follows----
From: "Anthony Israel-Davis" <[EMAIL PROTECTED]>
Reply-To: [email protected]
To: <[email protected]>
Subject: RE: [CFCDev] MVC and GetPageContext.Forward()
Date: Tue, 14 Jun 2005 12:53:42 -0700

Been lurking for quite some time, but now I'm finally on the board.

Peter, thanks for the example - that helped clarify this thread for me.
However, I need to better understand why getPageContext would be used
here. What is the advantage of using getPageContext over simply
cfincluding the dsp_form.cfm?

Thanks

Anthony

   _____

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On
Behalf Of Dawson, Michael
Sent: Tuesday, June 14, 2005 12:13 PM
To: [email protected]
Subject: RE: [CFCDev] MVC and GetPageContext.Forward()

This looks great!  Thanks for the example.

M!ke

   _____

From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
On Behalf Of Peter H
Sent: Tuesday, June 14, 2005 1:26 PM
To: [email protected]
Subject: RE: [CFCDev] MVC and GetPageContext.Forward()
Sorry for the naff (and I do mean naff example) but I'm heading
out for dinner in about 10 mins so had to dash this off. It's not
elegant and would work a lot better is you passed a validation object
back instead and just check for isValid etc
Here's the input form:
<cfscript>
if(StructKeyExists(request, 'Form')) Form = Request.Form;
</cfscript>
<cfparam name="Form.txtFirstName" default="" />
<cfparam name="Form.txtLastName" default="" />
<cfparam name="Form.txtAge" default="" />
<cfparam name="Form.Errors" default="StructNew()" />
<html>
<head>
<title>Person Details</title>
<meta http-equiv="Content-Type" content="text/html;
charset=iso-8859-1">
</head>
<body>
<form action="" method="post" name="form1"
target="_self">
  <table width="75%" border="1">
    <tr>
      <td>First Name:</td>
      <td><input name="txtFirstName" type="text"
id="txtFirstName" value="<cfoutput>#Form.txtFirstName#</cfoutput>"
size="40" maxlength="50"></td>
   <td>
     <cfif StructCount(Form.Errors) gt 0 and
StructKeyExists(Form.Errors,
'txtFirstName')><cfoutput>#Form.Errors['txtFirstName']#</cfoutput></cfif
>
   </td>
    </tr>
    <tr>
      <td>Last Name:</td>
      <td><input name="txtLastName" type="text" id="txtLastName"
value="<cfoutput>#Form.txtLastName#</cfoutput>" size="40"
maxlength="50"></td>
   <td>
     <cfif StructCount(Form.Errors) gt 0 and
StructKeyExists(Form.Errors,
'txtLastName')><cfoutput>#Form.Errors['txtLastName']#</cfoutput></cfif>
   </td>
    </tr>
    <tr>
      <td>Age:</td>
      <td><input name="txtAge" type="text" id="txtAge"
value="<cfoutput>#Form.txtAge#</cfoutput>" size="40"
maxlength="50"></td>
   <td>
     <cfif StructCount(Form.Errors) gt 0 and
StructKeyExists(Form.Errors,
'txtAge')><cfoutput>#Form.Errors['txtAge']#</cfoutput></cfif>
   </td>
    </tr>
    <tr align="center">
      <td colspan="2"><input type="submit" name="Submit"
value="Submit"></td>
    </tr>
  </table>
</form>
</body>
</html>
Here is the validation form:
<cfscript>
Errors = StructNew();

if(Len(Form.txtFirstName) lt 1)
  StructInsert(Errors, 'txtFirstName', 'You must enter your
first name');
if(Len(Form.txtLastName) lt 1)
  StructInsert(Errors, 'txtLastName', 'You must enter your last
name');

if(not isNumeric(Form.txtAge) or Form.txtAge lt 1 or
Form.txtAge gt 100)
  StructInsert(Errors, 'txtAge', 'You must enter a valid number
between 1 and 100');
if(StructCount(Errors) gt 0)
  Form.Errors = Errors;
</cfscript>
<cfif StructKeyExists(Form, 'Errors') >
<cfscript>
  Request.Form = Form;
  GetPageContext().Forward('dsp.form.cfm');
</cfscript>
<cfelse>
<cfoutput>Congratulation #Form.txtFirstName#
#Form.txtLastName#, you look great for a #Form.txtAge# year
old!</cfoutput>
</cfif>

Cheers, Pete (aka lad4bear)
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CFCDev is run by CFCZone (www.cfczone.org) and supported by CFXHosting (www.cfxhosting.com).

CFCDev is supported by New Atlanta, makers of BlueDragon
http://www.newatlanta.com/products/bluedragon/index.cfm

An archive of the CFCDev list is available at www.mail-archive.com/[email protected] ----------------------------------------------------------
You are subscribed to cfcdev. To unsubscribe, send an email to [email protected] with the words 'unsubscribe cfcdev' as the subject of the email.

CFCDev is run by CFCZone (www.cfczone.org) and supported by CFXHosting (www.cfxhosting.com).

CFCDev is supported by New Atlanta, makers of BlueDragon
http://www.newatlanta.com/products/bluedragon/index.cfm

An archive of the CFCDev list is available at www.mail-archive.com/[email protected]

RE: [CFCDev] MVC and GetPageContext.Forward()

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