Thoughts on many-to-many relationship

Hi All,

When I try to create a Group (django.contrib.auth.models.Group)
dynamically, I get the below error.

'Group' instance needs to have a primary key value before a many-to-
many relationship can be used.

This is because I am trying to add permissions to the group object and
trying to save every thing in one shot. As a work around to this
problem, I am doing an intermediate save and reload of Group object,
which seems to work fine.

Is there a logical reason behind this error? Is this something
fixable?

Regards,
Prabhu
P.S: Exact source code here -
http://github.com/prabhu/invoicy/blob/3f32fff86b806bc0b769de6de7dbe049788f0b24/invoicy/common/utils/decorators.py

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