[Zope-dev] SkinScripts instantiating new objects

2001-02-16 Thread Stefan Karlsson 

Hi,

I want my SkinScript to instantiate a new object of type ProjektHandler
and put it into an attribute called projekt. For this I have created
an external method, returning a new object of type ProjektHandler (simplified):

def getNewProjektHandler(self, parentId, parentClass):
h = ProjektHandler()
return h

The skinscript look like this:
WITH self.getNewProjektHandler(self.id, 'Projektagare') COMPUTE projekt=RESULT

This works if I call it from python, e. g
print self.mySpecialist.getItem('foo').projekt

But it does not work when I call it from the web, e. g
http://server/mySpecialist/foo/projekt (see the traceback from the log file below)

Has anyone an idea why this doesn't work?

Zope 2.3.0b2
ZPatterns 0.4.3b1

/Stefan Karlsson


--
2001-02-16T11:28:35 PROBLEM(100) ZPatterns Error computing attribute projekt
Traceback (innermost last):
  File /home/stefan/myzope/zope2/lib/python/Products/ZPatterns/AttributeProviders.py, 
line 311, in _
AttributeFor
(Object: GAPMixin)
  File Products/ZPatterns/Expressions.py, line 122, in eval
  File DocumentTemplate/DT_Util.py, line 336, in eval
(Object: self . getNewProjektHandler ( self . id , 'Projektagare'  ))
(Info: self)
  File string, line 0, in ?
  File DocumentTemplate/DT_Util.py, line 140, in careful_getattr
AttributeError: getNewProjektHandler



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Re: [Zope-dev] SkinScripts instantiating new objects

2001-02-16 Thread Stefan Karlsson 

At 14:31 2001-02-16, Steve Alexander wrote:
Stefan Karlsson wrote:

  Hi,
 
  I want my SkinScript to instantiate a new object of type
  ProjektHandler and put it into an attribute called projekt.

In your example, there is no sense of the ProjektHandler instance being 
saved persistently in the attribute. A new object is created for each 
transaction. Is this what you want?

Yes, that was my intention.

BTW is it possible to save the ProjektHandler instance persistently
in the attribute? Is there an easier way than creating a separate
specialist for the ProjektHandler class and storing the instances there?


  For this I have created
  an external method, returning a new object of type ProjektHandler

Where have you put this external method? That is, where in the ZODB?

I have put it in the rack, the specialist and higher up in the hierarchy. 
Makes no difference.



  The skinscript look like this:
 
  WITH self.getNewProjektHandler(self.id, 'Projektagare')
COMPUTE projekt=RESULT
 
  This works if I call it from python, e. g print
  self.mySpecialist.getItem('foo').projekt
 
  But it does not work when I call it from the web, e. g 
http://server/mySpecialist/foo/projekt

That's as I expect. Generally, you call methods from URLs, you don't 
retrieve the values of attributes.

So, what do you suggest, should I implement __bobo_traverse__ or
something in foo to make the URL work?

/Stefan Karlsson



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