Brad-
Maybe its a bug and maybe its just a bad error message. I came across
this problem a while back when I had a student who was trying to
build a system where some files could sometimes be called as a custom
tag and sometimes as a plain template (about like you're doing).
The behavior feels wrong. You've covered a lot of the same ground that
I did when I the student (I wish I could remember his name) pointed it
out. I'll reconstruct my tests (much of which review/echo what you've
done):
--------
foo.cfm looks like this:
<cfset ATTRIBUTES.x=structnew()>
If you call foo.cfm as a custom tag it will run fine.
If you call foo.cfm directly it will throw the error you've already
noted in this thread.
--------
Change foo.cfm to:
<CFOUTPUT>#isStruct(ATTRIBUTES)#</cfoutput>
If you call foo.cfm as a custom tag it will return "YES".
If you call foo.cfm directly it will throw variable not defined error.
--------
Now let's change foo.cfm to:
<CFSET ATTRIBUTES=structnew()>
<cfset ATTRIBUTES.x=structnew()>
If you call foo.cfm as a custom tag it will run fine.
If you call foo.cfm directly it will run fine.
--------
Which leads us to the code-around for the problem:
<CFIF NOT IsDefined("ATTRIBUTES")>
<CFSET ATTRIBUTES=StructNew()>
</cfif>
<cfset ATTRIBUTES.x=structnew()>
Which is uglier than it ought to be but does seem to work.
It seems to me (but I may be wrong) that the explanation is that
the ATTRIBUTES structure (scope) is automatically defined when a file
is called as a custom tag but is not automatically defined when a
file is called directly. Because ATTRIBUTES is not defined it would
follow that you can not make one of its keys into a structure. (A
conclusion you reached as well.) If that reasoning bears out this is
just a confusing error message.
To test our thinking make one more change to foo.cfm:
<CFIF NOT IsDefined("ATTRIBUTES")>
<CFSET ATTRIBUTES=StructNew()>
</cfif>
<CFOUTPUT>#isStruct(ATTRIBUTES)#</cfoutput>
<cfset ATTRIBUTES.x=structnew()>
<CFSET cheese.y=Structnew()>
If our idea makes sense when we call the file as a custom tag we should
get the "Cannot assign result to symbol cheese.y" and ... we do.
So really (maybe) this is just a confusing error message.
And, BTW, all of this seem to hold true on CF5.0 as well.
The thing I haven't played with is the Array stuff. I will now-
thanks for bringing it up.
Craig Fisher
Alta Interactive, Inc.
http://www.altainteractive.com/
[EMAIL PROTECTED]
801-791-8251
-----Original Message-----
From: Brad Roberts [mailto:[EMAIL PROTECTED]]
Sent: Thursday, May 24, 2001 3:45 PM
To: CF-Talk
Subject: Conclusion? (RE: Attributes Scoped Structure?)
Okay, I think I'm getting somewhere.
First, you can create an array in the attributes scope. The following
works.
---------------------------------------------------------
<cfset attributes.test=arraynew(2)>
<cfoutput>#arraylen(attributes.test)#</cfoutput>
---------------------------------------------------------
I created a custom tag called <cf_test>:
---------------------------------------------------------
<!--- test.cfm --->
<cfoutput>
#IsStruct(attributes)#
</cfoutput>
---------------------------------------------------------
When calling the custom tag above <cf_test>, the result is "yes".
"Attributes" must be a default structure within a custom tag.
I then changed <cf_test> to this:
---------------------------------------------------------
<!--- test.cfm --->
<cfset attributes.temp=structnew()>
<cfoutput>
#IsStruct(attributes.temp)#
</cfoutput>
---------------------------------------------------------
Again, the result was "yes".
So, why can you create an attributes scoped structure inside of a custom
tag, but not in your normal template?
I'm concluding that the attributes scope has to be a structure first, and
then you can nest a structure inside it.
The following works fine in a normal template:
---------------------------------------------------------
<cfset attributes=structnew()>
<cfset attributes.test=structnew()>
<cfoutput>#isstruct(attributes.test)#</cfoutput>
---------------------------------------------------------
Is this a bug? Anyone else have an opinion?
Brad
> -----Original Message-----
> From: Howarth, Craig (IBK-NY) [mailto:[EMAIL PROTECTED]]
> Sent: Thursday, May 24, 2001 2:20 PM
> To: CF-Talk
> Subject: RE: Attributes Scoped Structure?
>
>
> This is interesting and I don't have an answer. Perhaps someone
> else can explain this.
>
> The statement
>
> <cfset attributes.temp=structNew()>
>
> will fail as described below if placed in a standard template,
> but works fine in a custom tag. This led to my response to Brad.
> Not being a Fuseboxer, I should have experimented further.
>
> As Jason points out the following works fine in a standard template:
>
> <cfset attributes.temp=3>
>
> Why the difference with assigning simple values to attributes
> scope as opposed to structures?
>
> > -----Original Message-----
> > From: Jason Lotz [SMTP:[EMAIL PROTECTED]]
> > Sent: Thursday, May 24, 2001 11:58 AM
> > To: CF-Talk
> > Subject: Re: Attributes Scoped Structure?
> >
> > That's not true. Fusebox uses nothing but Attributes scoped
> variables. You
> > can set Attributes variables anywhere.
> >
> > ----- Original Message -----
> > From: "Howarth, Craig (IBK-NY)" <[EMAIL PROTECTED]>
> > To: "CF-Talk" <[EMAIL PROTECTED]>
> > Sent: Thursday, May 24, 2001 7:36 AM
> > Subject: RE: Attributes Scoped Structure?
> >
> >
> > Brad,
> >
> > The attributes scope can only be used within a custom tag. This is the
> > error message that you get when you attempt to assign a value to the
> > attributes scope in a normal template.
> >
> > Craig
> >
> > > -----Original Message-----
> > > From: Brad Roberts [SMTP:[EMAIL PROTECTED]]
> > > Sent: Thursday, May 24, 2001 9:55 AM
> > > To: CF-Talk
> > > Subject: Attributes Scoped Structure?
> > >
> > > Can you set a structure in the attributes scope?
> > >
> > > I'm wondering why this isn't working:
> > >
> > > <cfset attributes.temp=structnew()>
> > >
> > > I get the following error:
> > > Cannot assign result to symbol attributes.temp
> > >
> > > Thanks in advance,
> > >
> > > Brad
> > >
> > >
> >
>
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