I'm using django-guardian in order to manage per object permission.

For a given user I give permission all permission on one object:

joe = User.objects.get(username="joe")

mytask = Task.objects.get(pk=1)

assign('add_task', joe, mytask)
assign('change_task', joe, mytask)
assign('delete_task', joe, mytask)

and I get, as expected:

In [57]: joe.has_perm("add_task", mytask)
Out[57]: True

In [58]: joe.has_perm("change_task", mytask)
Out[58]: True

In [59]: joe.has_perm("delete_task", mytask)
Out[59]: True

In admin.py I also make TaskAdmin inherit from GuardedModelAdmin instead of admin.ModelAdmin

Now when I connect to my site with joe, on the admin I get:

You don't have permission to edit anything 

Am I not supposed to be able to edit the object mytask?

Do I have to set some permissions using the built-in model-based permission system?

Am I missing anything?

Thank you