ESP, sling.include and variable scope

[Branden Visser <br...@uwindsor.ca>]

Hi all,

If I include a script that has similarly named variables as my parent 
script, I *think* the common variables in the parent script are being 
wiped out.

For example:

<%
   var foo = currentNode.getNode('foo');

   sling.include('/my/content/foobar.html');

   var bar = foo.getNode('bar');
%>

If the script mapped to /my/content/foobar.html contains a variable 
'foo', then the last statement will give an error, because foo is now 
undefined in the parent.

I haven't had a chance to create a definite test case to verify it yet, 
but multiple observations of my variables being mysteriously wiped out 
suggest this is what is happening.

Is this to be expected?

Best,
Branden

Re: ESP, sling.include and variable scope

[Alexander Klimetschek <ak...@day.com>]

On Wed, Aug 26, 2009 at 10:04 PM, Branden Visser<br...@uwindsor.ca> wrote:
> If I include a script that has similarly named variables as my parent
> script, I *think* the common variables in the parent script are being wiped
> out.
>
> For example:
>
> <%
>  var foo = currentNode.getNode('foo');
>
>  sling.include('/my/content/foobar.html');
>
>  var bar = foo.getNode('bar');
> %>
>
> If the script mapped to /my/content/foobar.html contains a variable 'foo',
> then the last statement will give an error, because foo is now undefined in
> the parent.
>
> I haven't had a chance to create a definite test case to verify it yet, but
> multiple observations of my variables being mysteriously wiped out suggest
> this is what is happening.
>
> Is this to be expected?

AFAIK both esp files are executed completely separately, since the
sling include starts a whole new (include) request processing step -
for example, the code that gets executed for /my/content/foobar.html
could be a Java servlet. Therefore it is unlikely a javascript
variable conflict.

It could be that the node under "foo" gets removed which might lead
into an exception (wild guess). Or maybe that the javascript-to-java
binding makes problems in certain cases (which would rather explain an
"undefined var" error). Nevertheless, I think you should debug that
further, because I think it needs more information to pin-point the
real issue.

Regards,
Alex

-- 
Alexander Klimetschek
alexander.klimetschek@day.com