I'm having a bit of confusion as to how to best approach the display
of edit/delete/create links in my templates as my application needs
this to be based on group permissions OR cascading object owenership.

The situation is I have two models with a FK relationship and each has
a method to check if a user is the owner of that object or it's parent
object.

class Project(models.Model):
    owner = models.ForeignKey(User)

def is_owner(self, user):
        '''
        Encapulated method for checking owner ship.  Required for
dectorators.
        '''
        if user == self.owner:
            return True
        return False
    ...

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