I used to do it this way then I had this "bright" idea to just extend a CFC
that had a whole slew of application specific values/settings that I
needed. Then after realizing that was not so bright of an idea, seemed good
on paper, I went back to this. The only thing I do different is I have a
private method named RaiseInit that basically just checks to make sure that
the object has been initiated before running any of the methods. I have
that private method for when others use the objects and are not all that
familiar with using them and the need to initialize them.
On 10/16/07, Joe Rinehart <[EMAIL PROTECTED]> wrote:
>
> > Is it possible to invoke the whole component with the database
> > information and then call that instance without the dns??
>
> Yep - it's exactly what you should be doing!
>
> This example is simplified (normally, I'd use a CFC to represent a
> datasource instead of using the raw string datasource name. It shows
> a CFC ("Meals") that has a "constructor" function named "init" that
> takes all of the configuration data for the CFC instance. This is a
> common practice in the land of OO ColdFusion, as it matches how
> ColdFusion constructs Java objects. After a Meals instance is
> constructed, all of its functions can then just use the variables.dsn
> property.
>
> Meals.cfc:
>
> <cfcomponent>
>
> <cffunction name="init" hint="Constructor">
> <cfargument name="dsn" />
>
> <!--- Set "dsn" to the variables scope, so that it's usable by
> other
> functions in this CFC. --->
> <cfset variables.dsn = arguments.dsn />
>
> <!--- Return "this" to send back the built version of this
> component
> --->
> <cfreturn this />
> </cffunction>
>
> <cffunction name="getMeal">
>
> <cfset var myQuery = "" />
>
> <!--- Now, use the stored DSN --->
> <cfquery datasource="#variables.dsn#" name="myQuery">
> SELECT foo FROM bar
> </cfquery>
>
> <cfreturn myQuery />
> </cffunction>
>
> </cfcomponent>
>
> Calling code:
>
> <!--- Create an instance of Meals. You could create one instance in
> the application scope, shared by all requests! --->
> <cfset meals = createObject("component", "cfc.Meals").init
> (application.dsn) />
>
> <cfdump var="#meals.getMeal()#" />
>
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