On Fri, 24 Dec 2004 21:26:18 -0600, Jared Rypka-Hauer - CMG, LLC
<[EMAIL PROTECTED]> wrote:
> Right... This is for moving from say... the DB to the screen via a
> single method call i.e. thisUser.get(12)
> <cfoutput>thisUser.fname</cfoutput>
You're relying on the public "this" scope in order to be able to
directly access data members from outside the object. A lot of people
think this is a bad idea and you should use "variables" scope instead
and provide 'get' functions for the attributes:
<cfoutput>#thisUser.getFName()#</cfoutput>
This prevents accidental modification of data within the object.
> where inside the CFC this.fName = query.fname and this.fName =
> query.lName and init(12) is passing the table's pkey value (possibly a
So you'd either say:
variables.fName = query.fName;
variables.lName = query.lName;
or:
setFName(query.fName);
setLName(query.lName);
if you used public or private set methods instead.
> I've got that THIS thing down fine. I guess it's the difference
> between private instance data and function-private variables that has
> me a little puzzled.
<cffunction name="foo">
<cfset var x = "exists only for this call of foo"/>
<cfset y = "exists across all calls for the same instance"/>
<cfset variables.z = "same scope as y"/>
</cffunction>
None of x, y or z can be accessed from outside the object. x is
created fresh for every call of foo() (and is therefore thread safe).
y and z are created on the first call but the same y and z are updated
on subsequent calls (for the same instance).
If the instance is in application scope, x is still local but y and z
are effectively application scope variables.
> And even at that, I can see why one would choose to use function
> private variables for somethings,
"function local" - private means something else.
--
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