"but in general, a CFC instance that is persisted across requests holds
onto the page context of the request during which it was created."
"Page Context Bug" occurs only when the *.cfc instance is persisted in
any Memory scope..?
e.g
server.someInstance = createObject("Component","MyCFC");
Or
application.someInstance = createObject("Component","MyCFC");
Or
session.someInstance = createObject("Component","MyCFC");
All the above instances will lead to "Page Context Bug" right ?
So in the below cases... we shouldnt have any problems.. setting any scope
variables within CFC's
request.someInstance = createObject("Component","MyCFC");
Or
variables.someInstance = createObject("Component","MyCFC");
Thanks
Joe Eugene
----- Original Message -----
Sent: Friday, June 20, 2003 2:33 AM
Subject: RE: [CFCDev] Setting Scoped Vars
in CFC's - Was (Dynamic CFC Calls)
The "page
context bug" is the issue to watch out for. If you search for "page
context bug" on Google you will find more than you ever wanted to know --
since it has been covered in depth on this list in the recent past I won't get
into the details, but in general, a CFC instance that is persisted across
requests holds onto the page context of the request during which it was
created.
If you aren't persisting your CFC instances in memory across requests
it's not something you need to even think about. I would also not be
surprised, given that this is an acknowledged and much maligned bug, if you
see fixes to all page context issues in future maintenance release of
CFMX.
Just wondering, havent seen any docs on this.
Are there any problems setting/manipulating scope variables
like
1. Server Scope
2. Application Scope
3. Request Scope
4. Client Scope
Variables within CFC's.. Appreciate any input.
Thanks,
Joe Eugene
How
do i use argumentCollection? is there some kinda collection
available in CFMX like Java Collections?
Thanks,
Joe
If
you want to pass the argument names dynamically, I suggest you use the
argumentCollection
Thanks
Nathan, I knew.. there was a way
around the "evaluate"....
It was
really bothering me.. to advocate NOT to use "evaluate"
and
having
forced to use it.
One
more question.. havent tested it..
Can i
pass the parameters in
value=
variables[objName].dynMethod(request.param1,request.param2);
Thanks
Joe Eugene
A similar method, if you need the dynamically called method
to have access to the CFC internals might be:
<cfscript>
object = createObject("component",
"yourComp");
objName =
"object";
methodName =
"yourMethod";
variables[objName].dynMethod =
variables[objName][methodName];
value=
variables[objName].dynMethod();
writeOutput(value);
</cfscript>
In the original, you are "stripping" the method off the CFC
instance and making it local. In my method you are
"tacking" the dynamic method back onto the CFC instance. It
only matters if the method you call also calls private/public
methods of the CFC and/or uses instance data of the
CFC.
This works (tested):
<cfscript>
object =
createObject("component",
"yourComp");
objName =
"object";
methodName =
"yourMethod";
dynMethod =
variables[objName][methodName];
value=
dynMethod();
writeOutput(value);
</cfscript>
Is that what you're
after?
Adam
Cameron
Application Developer
Straker
Interactive
[EMAIL PROTECTED]
Fax + 64 9
3605870
DDI +64 4 4965664
Thanks Samuel... but that does NOT
work.
The only way i can get it to work is using
an evaluate.... and i really dont want to use
"evaluate"
variables.execMethod="request."&variables.varClass&"."&variables.varMethod;
'#variables.varName#'=
evaluate(variables.execMethod);
Your Code...
variables[varName] =
request[variables.varClass][variables.varMethod](); //
Complains about "()"
The compiler complains about the "()"
at the end... can u get it to work?
Thanks
Joe Eugene
----- Original Message -----
Sent: Tuesday, June 17,
2003 3:45 PM
Subject: RE: [CFCDev]
Dynamic CFC Calls
two ways,
1.
request.dataObj =
createObject("Component","Website/MyData");
varObj="dataObj";
varMethod="getStateData"; // removed the
parens
varName="someData";
variables[varName] =
request[varObj][varMethod]();
2.
<cfinvoke
component="#request[varobj]#" method="#varMethod#"
returnVariable="#varName#">
Untested but both should work.
hth,
Sam
Anybody know how to dynamically call
methods in CFC's
<cfscript>
request.dataObj =
createObject("Component","Website/MyData");
varObj="dataObj";
varMethod="getStateData()";
varName="someData";
// Now, i want to be able to call the
CFC Dynamically, something like
'#varName#'=request["#varObj#"]["#varMethod#"];
//.#varMethod# doesnt work
either.
</cfscript>
I am getting the below from the above
code.
"Element getleftNavLinks is undefined in
a Java object of type class
coldfusion.runtime.TemplateProxy referenced
as"
What am i missing?..
Thanks
Joe
Eugene
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