Josef Meile escribió:
Hi Garito,
I saw in another thread you still need this. If I'm not wrong what you
are pretending is to somehow render zpt on the fly. So, here is my idea:
I would like to write things like:
object.property = 'here/anotherproperty'
object.anotherproperty = 'Barcelona'
and ask it like:
print object.property -> 'Barcelona'
or
<tal:city tal:replace='here/property' /> -> 'Barcelona'
Is this possible?
I think you could perhaps create a new class to store the tal
expression attributes, let's say you called it ExpressionAttribute.
This class must be callable and be able to evaluate tal expressions.
This is a small sketch of how I think it should look like:
from Products.PageTemplates.ZopeTemplate import ZopeTemplate
class ExpressionAttribute:
#Here I also assume that you only enter the expressions
#without html and the tal part, like: 'here/property'
#Please also noticed that all sintax errors in your zpt
#code must be catched somewhere
def __init__(self, id, talExpr):
self.talExpr = '<span tal:replace="%s"/>' % talExpr
#I'm not sure about this, but I think it will create a Template on
#the fly.
self.zpt = ZopePageTemplate(id, text = self.talExpr)
#Note: I really don't know if you have to pass other parameters to
#pt_render, ie: the container of your property. You will have to test
#this.
def __call__(self):
return self.zpt.pt_render()
Then, in the __init__ of your zope product you will need to do things
like this:
class YourProd(...):
def __init__(self,prop1,prop2,prop3,...):
#This is a normal property
self.prop1 = prop1
#This two are tal expression properties
self.prop2 = ExpressionAttribute(prop1)
self.prop3 = ExpressionAttribute(prop1)
Then, I guess you can call it as:
yourProdObj.prop3 or in tal: here/prop3
I'm not sure about what I wrote and if this is what you are looking
for. I just hope it helps.
Regards
Josef
_______________________________________________
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists - http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
Hi, Josef!
Thank you for your help but I think your aproach is a little complicate
I'm asking for this because it seems to be the simplest way (at least in
my brain)
I prefer the new aproach I'm searching for (see "How to create a new TAL
statement?" thread)
But thank you so much for your idea!!!
--
Mis Cosas
http://blogs.sistes.net/Garito
_______________________________________________
Zope maillist - Zope@zope.org
http://mail.zope.org/mailman/listinfo/zope
** No cross posts or HTML encoding! **
(Related lists -
http://mail.zope.org/mailman/listinfo/zope-announce
http://mail.zope.org/mailman/listinfo/zope-dev )
