Understanding Helpers and User Defined Functions

[Nathan Stanford Sr]

I know there is the  /includes/helpers/ApplicationHelper.cfm

I think I saw where you could put helpers in view file like

/views/test/myveiw.cfm

/views/test/myveiwHelper.cfm put the UDF's in here just for this view only.

Is this true?

If not then what is the best Practice for this?

[Nathan Stanford Sr]

Is there a way to include a helper that is not global in side of one or two handlers?

or in the Model?

[br...@bradwood.com]

It is true. 

What you describe is called impicit view helpers.

http://wiki.coldbox.org/wiki/Layouts-Views.cfm#Implicit_View_Helpers

You can also get more reusable and manually include helper UDFs wherever you need them.

http://wiki.coldbox.org/wiki/Layouts-Views.cfm#Helper_UDF%27s

Thanks!

~Brad

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[br...@bradwood.com]

In handlers, you can use includeUDF()
http://wiki.coldbox.org/wiki/Layouts-Views.cfm#Helper_UDF%27s

As far as my models, my application has a supertype component that everything inherits from where I put some basic stuff like cfscript versions of dump and mail.  (I'm still on CF8 as work)

As far as utility functions like formatting and conversion, I keep those in a CFC and either inject a reference to that CFC, or to that method. 

I have this dummy CFC that returns references to my UDFs:

<cfcomponent name="UDF" hint="I am a UDF loader." output="no" autowire="true">
    <cfproperty name="UDFLibraryFile" inject="coldbox:setting:UDFLibraryFile" scope="variables">

    <cffunction name="init" output="false">
        <cfinclude template="#UDFLibraryFile#">
        <cfreturn this>
    </cffunction>
   
    <cffunction name="onMissingMethod" access="public" output="false"
        hint="Instead of implementing each UDF here, I load the UDF from it's location based on the missing method name.">
        <cfargument name="MissingMethodName"/>
        <cfargument name="MissingMethodArgumnts" hint="not supported by coldbox DI DSL"/>
        <cfreturn variables[MissingMethodName]>
    </cffunction>
   
</cfcomponent>

When I want a reference to a single method out of my UDF library, I ask wirebox to inject "model:UDF:myUDFName".  That hits the dummy CFC above and returns a reference to that method which gets mixed directly in to my model. 

You might not like that, but I thought I would share what we had cooked up at my job.  I've actually wanted to talk to Luis about an enhancement to WireBox DLS to allow you to request a single method be mixed in in a similar fashion without the need for the dummy CFC above.

Thanks!

~Brad

-------- Original Message --------
Subject: [coldbox:11249] Re: Understanding Helpers and User Defined
Functions
From: Nathan Stanford Sr <nathan....@gmail.com>