Question

I’m setting up a new Django app and need to customize the Admin for a given table by restricting the records where a field is NULL. Basically a built-in, permanent filter.

Seems like changelist_view needs to be overridden, but I’m uncertain what that change would look like.

There’s no code to be included as I’m not overriding changelist_view right now.

Answer 1

You can override default manager, but it has a drawback that you’ll have to explicitly specify original manager in all your queries:

class MyManager(models.Manager):
    def get_query_set(self):
        return super(MyManager, self).get_query_set().filter(my_field__isnull=False)

class MyModel(models.Model):
   objects = MyManager()
   all_objects = models.Manager()

MyModel.all_objects.all()    # all objects including those having my_field=None