Annotating a Django queryset with a left outer join?

Question

Say I have a model:

class Foo(models.Model):
    ...

and another model that basically gives per-user information about Foo:

Answer 1

As for outerjoins: Once you have a queryset qs from foo that includes a reference to columns from userfoo, you can promote the inner join to an outer join with qs.query.promote_joins(["userfoo"])