This question is connected to my other question but I changed the logic a bit.

I have models like this:

from django.contrib.auth.models import Group

class Category(models.Model):
   (...)
   editors = ForeignKey(Group)

class Entry(models.Model):
   (...)
   category = ForeignKey(Category)

Now let's say User logs into admin panel and wants to change an Entry. How do I limit the list of Entries only to those, he has the right to edit? I mean: How can I list only those Entries which are assigned to a Category that in its "editors" field has one of the groups the User belongs to?

What if User belongs to several groups? I still need to show all relevant Entries.

I tried experimenting with changelist_view() and queryset() methods but this problem is a bit too complex for me.

I'm also wondering if granular-permissions could help me with the task, but for now I have no clue.

I came up only with this: First I get the list of all Groups the User belongs to. Then for each Group I get all connected Categories and then for each Category I get all Entries that belong to these Categories. Unfortunately I have no idea how to stitch everything together as filter() parameters to produce a nice single QuerySet.