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User manager

Author:
diverman
Posted:
July 12, 2009
Language:
Python
Version:
1.0
Tags:
filter foreignkey user manager queryset owner users user-foreign-key
Score:
2 (after 2 ratings)

If you have a model with foreign key to User, you can use this manager to show (i.e. in admin interface) only objects, that are related to currently logged-in user. Superuser sees all objects, not only his.

Requires: ThreadlocalsMiddleware

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class UserManager(models.Manager):
    def __init__(self, *args):
        try:
            self.fk_field_name = args[0]
        except IndexError:
            self.fk_field_name = None

        super(UserManager, self).__init__()

    def get_query_set(self):
        query_set = super(UserManager, self).get_query_set()
        
        if self.fk_field_name:
            current_user = get_current_user()

            if current_user and not current_user.is_superuser:
                return query_set.filter(**{ '%s__exact' % self.fk_field_name: current_user })

        return query_set

# Example usage

class TestModel(models.Model):
    owner = models.ForeignKey('auth.user')
    objects = UserManager('owner')

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