[Zope-dev] Finding specific parent object with acquisition ?

[Martijn Jacobs]

Hello!

I have a question about acquisition and namespaces and how to use them in
your product code.....

Imagine you have the following structure in zope : 
(ProductA is a Product derived from Folder/Objectmanager so it can hold other 
objects, ProductB is a simpleitem product)

Root
 |
  ----ProductA
               |
               ----Folder6
                           |
                           ----Folder7
                                        |
                                        ----ProductB
                                        |
                                        ----DTMLDoc1


OK : If I execute http://localhost/ProductA/Folder6/Folder7/DTMLDoc1 and I
put in the DTMLDoc1 this code :  '<dtml-var "ProductA">' , it will look
back and it will find the ProductA instance and it will call it's index_html,
because in DTML you have a namespace where the DTML-execute code can
find 'ProductA' on a great way.

Now the following thing : I want to acquire a reference TO ProductA
IN the product code of ProductB so I will be able to execute functions from
ProductA in ProductB, for example : 
 
class ProductB(.....)
   def blah():
      refProdA = self.acquire('ProductA');   

(self.acquire is not a real function, only for illustration what kind of
 function I would like to have in a Zope object :) 

Do I have a same namespace in my Productcode (the python code of this product)
so it will acquire automaticily the reference to ProductA, for example the way
I use here above?  Or do I have to program this manually by repeatly calling 
the aq_parent method until I find an instance of 'ProductA'  ?

thnx in advance,

martijn jacobs
eastsite