Django object multiple exclude()

Question

Is there a way to do a query and exclude a list of things, instead of calling exclude multiple times?

Answer 1

You can do it pretty easily with the Q object:

from django.db.models import Q

excludes = None
for tag in ignored_tags:
    q = Q(tag=tag)
    excludes = (excludes and (excludes | q)) or q # makes sure excludes is set properly
set_minus_excluded = Foo.objects.exclude(excludes)

You should also be able to do it dynamically with exclude():

qs = Foo.objects.all()
for tag in ignored_tags:
    qs = qs.exclude(tag=tag)