[Zope-CMF] Relocating the files in a ZOPE product

[Dieter Maurer]

suresh_vv wrote at 2004-1-7 10:23 -0000:
>I tried to do this and found that the instances of the old product in 
>my ZODB cannot be accessed anymore, even though I could create new 
>instances. 
>
>What gives?

Few will understand what you did and what problem you have ...

You should (really) post clearer questions.

I guess (really) that your renamed some source files defining
persistent objects. As a persistent object is represented
in the ZODB as "module-path + class-name + pickled-state",
it can no longer be instantiated when you change the module-path
or the class-name.

If I am right, I see two options for you:

  1.  create backward compatibility modules (under the old
      "module-path") with the content:

        from new-module-path import new-class-name as old-class-name

  2.  use the "__module_aliases__" feature in the product's
      "__init__.py" file.

      I am not sure, whether this feature is documented (if it is,
      it is probably in the Zope Developper Guide).
      You find an example (e.g.) in "PythonScripts".

-- 
Dieter