Re: [CFCDev] How to define a property on a CFC

[Ken Dunnington]

Just to clarify, the 'this' scope is available to the calling page of 
the CFC. The 'variables' scope (used inside the CFC) is not. You can 
use a memento to get all of the variables out of the CFC (or even a 
subset of the variables, it's up to you.) Either way, using internal 
variables might require more work up front, but the advantages of 
encapsulation will quickly pay for themselves.

Also, if you use a bean generator, be sure to proofread your code! Bean 
generators are good starting points, but should never be relied upon 
for final code. :)

On Nov 10, 2004, at 2:50 PM, Daniel Short wrote:
Gotcha, that makes sense :). I'm used to Get, Set and Let in VBScript
objects, just seemed odd to write methods to get and set variables. 
Gotta
twist my brain to a new way of thinking in this case.

Dan
-----Original Message-----
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Barney Boisvert
Sent: Wednesday, November 10, 2004 10:27 AM
To: [EMAIL PROTECTED]
Subject: Re: [CFCDev] How to define a property on a CFC
I'd consider it bad, because any code can modify variables in the THIS
scope.  Generally much better to use a getter, though there are
certainly exceptions.
If you do use 'this', then you need to make sure that your CFC's
internal workings don't depend on the value, because there's no
guarentee that it'll be what it "should" be.
cheers,
barneyb
On Wed, 10 Nov 2004 10:19:59 -0800, Daniel Short
<[EMAIL PROTECTED]> wrote:
That seems like an inordinate amount of code for just
setting and returning
properties. I decided to play with the THIS scope, and came
up with this:
<cfcomponent>
       <cffunction name="init">
               <cfset THIS.hasError = false>
       </cffunction>
       <cffunction name="mymethod">
               <cftry>
                       <!--- some bad code --->
                       <cfcatch>
                               <cfset THIS.hasError = true>
                       </cfcatch>
               <cftry>
       </cffunction>
</cfcomponent>
Then in the calling page, I have this:
<cfobject component="cfc/mycfc" name="mycfc">
<cfinvoke component="#mycfc#" method="init">
<cfinvoke component="#mycfc#" method="mymethod">
<cfoutput>#mycfc.hasError#</cfoutput>
Am I doing anything illegal or bad there? I had heard that
the THIS scope
was available outside the CFC, but I assumed that meant via
the THIS scope,
which I found to be not true. Just trying to figure out if
I might run into
a problem I'm not seeing by doing things this way.
Thanks,
Dan
--
Barney Boisvert
[EMAIL PROTECTED]
360.319.6145
http://www.barneyb.com/blog/
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