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OK
this all makes a little more sense......
1
question I have is why are you guys defining coreLV like
this
<cfset var coreLV =
"">
I am
just trying to make sure I am on the same page with everyone. coreLV is a
constant that is set on another page before it enters my cfc
thanks
for all your help
If you need access to a variable that's set on the
page (or a structure, array, query, etc) the way to do that would be to pass
them into the function in the CFC, just like you are passing in the tablename
as an argument. If you need access to a variable after it's been processed by
the CFC's function, the way to do that would be to return it using the
cfreturn tag at the bottom of the function.
Not 100% sure because i
don't understand the context of what you're trying to do, but i think it
should look more like this:
<CFFUNCTION NAME="createCoreConstants" access="remote">
<!--- pass all your variables into your functions --->
<cfargument name="DSN" type="string" required="yes">
<cfargument name="tablename" type="string" required="yes">
<cfargument name="queryCache30" required="yes">
<!--- var scope all variables local to the function - important --->
<!--- name of all queries or iterators, etc are var scoped --->
<cfset var coreLV = "">
<cfset var valueToReturn = "">
<!--- variables needed in the query are referenced from within
the encapsulated variable space of the CFC or function --->
<cfquery name="coreLV" datasource="#arguments.DSN#"
blockfactor="10" cachedwithin="#arguments.queryCache30#">
SELECT
dbo.#ARGUMENTS.tableName#.legalValue,
dbo.#ARGUMENTS.tableName#.lKey
FROM dbo.#ARGUMENTS.tableName#
where dbo.#ARGUMENTS.tableName#.isActive=1
</cfquery>
<!--- i know this isn't what you were doing exactly,
but just to give an example how a value can be returned
to the page (or another CFC) calling this function --->
<cfset valueToReturn = listchangedelims(
listchangedelims(listchangedelims(coreLV.legalValue,'_','-'),'_','
'),'_','/') >
<cfreturn valueToReturn />
</CFFUNCTION>
CFC's behave more or less like objects by
design, which means their variable space is encapsulated. There are distinct
advantages to encapsulation, there really are, but it's bit of a paradigm
shift from the "all variables are available" world of a procedurally coded CFM
page.
Encapsulation forces you to think about application design. And
if someone hasn't learned the art of OO design, encapsulation can seem much
more like a barrier than an advantage. Not sure how familiar you are with OO
principles, (and i'll take the liberty of assuming you don't know much about
it for the rest of this post, forgive me if i've got that wrong) but if you
haven't studied OO much, you might want to head in that direction to
understand how to get the most out of CFCs. It's not really necessary, you can
use them as simple function libraries, similar to how we've used UDF's in the
past. But to get the most power out of them, or even to understand what most
people are talking about on this list most of the time, understanding OO is a
must. Ask if you'd like some suggestions for OO books to
read.
HTH,
Nando
Hamoud, Ryan N. wrote:
So is not possible to accomplish this with a CFC? When i did this with my custom tage i was able to access allmy constants on any page as
follows.....example <cfset tablename = #C_LV#> I would still like to be able to do this.
-----Original Message-----
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]]On
Behalf Of Charlie Griefer
Sent: Thursday, March 09, 2006 3:31 PM
To: [email protected]
Subject: Re: [CFCDev] cfc scope issues
Ryan - a quick primer on scopes and CFCs:
http://ray.camdenfamily.com/downloads/cfcscopes.pdf
On 3/9/06, Hamoud, Ryan N. <[EMAIL PROTECTED]> wrote:
I am new to cfc's and was working on trying to convert some of my custom
tags to cfc's. The one problem I come across is trying to use the caller
scope.
In my custom Tag which is below I did this by:
<cfoutput query="coreLV">
<cfset "caller.C_#listchangedelims(
listchangedelims(listchangedelims(coreLV.legalValue,'_','-'),'_','
'),'_','/')#" = coreLV.lKey>
</cfoutput>
basically this just loops through a query and set up a bunch of constantsto
be used on any cfm page.
Now i would like to do the same in a cfc but cant get this to work. This is
what i have come up with so far..... Please Help
<CFFUNCTION NAME="createCoreConstants" access="remote" returntype="void">
<CFARGUMENT NAME="tablename" type="string" required="yes">
<cfquery name="coreLV" datasource="#request.app.DSN#"
blockfactor="10" cachedwithin="#request.app.queryCache30#">
SELECT
dbo.#ARGUMENTS.tableName#.legalValue,
dbo.#ARGUMENTS.tableName#.lKey
FROM dbo.#ARGUMENTS.tableName#
where dbo.#ARGUMENTS.tableName#.isActive=1
</cfquery>
<cfoutput query="coreLV">
<cfset "CALLER.C_#listchangedelims(
listchangedelims(listchangedelims(coreLV.legalValue,'_','-'),'_','
'),'_','/')#" = coreLV.lKey>
</cfoutput>
</CFFUNCTION>
Basically in the end I would like to execute a cfc that will loop through a
table and create constants for
each record in the table that are available to be accessed on any page
Thanks for you Help in advance
Ryan Hamoud
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Charlie Griefer
================================================
"...All the world shall be your enemy, Prince with a Thousand Enemies,
and whenever they catch you, they will kill you. But first they must catch
you, digger, listener, runner, prince with a swift warning.
Be cunning and full of tricks and your people shall never be destroyed."
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