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I've been stuck with this problems for weeks... I posted an earlier question bug got no replies, so I thought I'd try again.

I have a product that is used as a mix-in class in several other products. This product adds a management interface screen and I want to define permissions to control that screen in this class. So, I do:

class Publisher(RoleManager):

__ac_permissions__ = ( ('Change publishing', ('manage_publish')) )

manage_publish = HTMLFile('publish', globals())

In the product that uses this class:

class Something(Folder, Publisher.Publisher):

__ac_permissions__ = ( ('View management screens', ('manage_tabs', 'manage_main', ....)) ..... )

manage_options = ( {'label':'Edit', 'action':'manage_main'}, {'label':'Publish', 'action':'manage_publish'} )

Now, I think this should work... that's how it's done in AccessRole.Role.RoleManager - it defines __ac_permissions__ that get added to the classes that inherit from it. But it doesn't work for me... the permissions defined in Publisher don't appear anywhere. Any idea why, or what I'm doing wrong?

There is a little bit of non-obvious initialization work that needs to be done to gather the permission information from all the subclasses of an object. This is done by calling the method default__class_init__ (found in the Globals module), passing the class that represents the creatable object. The default__class_init__ method does the correct permission initialization for you. *Note that you must do this for the class of each creatable object your product defines. In your case, you would add to the bottom of your module:

import Globals

# pass the class of the creatable object # that we are defining so that permissions # are gathered up automatically from the # base classes Globals.default__class_init__(Something)

Hope this helps!

Thanks... and 3 cheers for the power of inside information! Sadly, it doesn't work. I added default__class_init__ to all my products and the inherited permissions still don't show up. I inserted 'print self.meta_Type' into default__class_init__, and it looks like it gets called for all my classes even when I do not explicitly include that call, when I do include it default__class_init__ gets called twice for every class. Can you think of anything that would prevent the inherited permissions from being included? -- Itai Tavor -- "Je sautille, donc je suis." -- itavor@vic.bigpond.net.au -- - Kermit the Frog -- -- "What he needs now is understanding... and a confederate victory" -- -- Dr. Jacobi, Twin Peaks --