[Zope] sql query results -> DTML method problem

[Manuel Amador (Rudd-O) Gerente de desarrollo Alpha]

Quoting Lee Reilly CS1997 <lreilly@cs.strath.ac.uk>:

> Hi,
> 
> I have a TINY problem, which I think there is a simple solution too...
> but for the life of me, I can\'t find it! I\'d be grateful if someone
> could point me in the right direction.
> 
> I have a database setup containing details of classes, students &
> lecturers. The user is prompted to enter a class code (a unique key)
> which is used to query the database and return the class title. Simple.
> 
> A DTML method prompts me for the class code
> -- I enter 52.139 and it posts to a method \'enterClassCodeAction\',
> below.
> 
> #1 	<dtml-var standard_html_header>
> #2 	<h2>Confirm</h2>
> #3 	<p>You entered <i><dtml-var class_code></i></p>
> #4
> #5 	<p>
> #6 	Our records show that <dtml-var class_code> is called
> #7
> #8 	<dtml-in expr=\"findClassTitle(code=52.139)\">

RING: dont do that, dtml wont work in python namespace
instead, remember that in python namespace all vars present in dtml namespace 
are inherited.

do this:
 	<dtml-in expr=\"findClassTitle(code=_.(\'class_code\'))\">
the __.() construct is required since underscore arent allowed in python 
variable names. if the var was called classcode, you could do
 	<dtml-in expr=\"findClassTitle(code=classcode)\">
dats it.

> #9 	<dtml-var title>
> #10 	</dtml-in>
> #11	
> #12
> #13 	</p>
> #14 	<dtml-var standard_html_footer>
> 
> ^ The method works fine when the class code is manually inserted (line
> #8) but when I try to pass the variable from the previou post, held in
> <dtml-var class_code> I have probs.
> 
> <dtml-in expr=\"findClassTitle(code=<dtml-var class_code>)\"> *** syntax
> error
> 
> findClassTitle is a ZSQL method for returning the class title given a
> class code:
> 	
> 	select title from classes 
> 	where <dtml-sqltest code op=eq type=float>
> 
> Hmm... anyone see the problem?
> 
> Thanks a lot :)
> 
> - Best regards,
> 
> Lee
> 
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