How to use "OR" using Django's model filter system?

It seems that Django's object model filter method automatically uses the AND SQL keyword.

For example:

>>> Publisher.objects.filter(name__contains="press", country__contains=&q开发者_JAVA技巧uot;U.S.A")

will automatically translate into something like:

SELECT ... 
FROM publisher
WHERE name LIKE '%press%'
AND country LIKE '%U.S.A.%'

However, I was wondering whether there was a way to make OR? I can't seem to find it in the documentation (oddly enough, searching for 'or' isn't really useful).

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You can use Q objects to do what you want, by bitwise OR-ing them together:

from django.db.models import Q
Publisher.objects.filter(Q(name__contains="press") | Q(country__contains="U.S.A"))

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Without Q(), you can also run OR operater as shown below:

Publisher.objects.filter(name__contains="press") | \
Publisher.objects.filter(country__contains="U.S.A")