Select values which not in another table with Django

问题

How this SQL query can be translated to Django ORM statement?

SELECT field1, field2, field3
FROM table1
WHERE field1 NOT IN 
(SELECT 2_field1 FROM table2);

Kindly help! :)

ps
table1 and table2 not bounded with ForeignKey or ManyToMany

回答1:

Using two QuerySets, as shown in the docs.

inner_qs = table2.objects.all()
results = table1.objects.exclude(field1__in=inner_qs)

来源：https://stackoverflow.com/questions/14105660/select-values-which-not-in-another-table-with-django