How can I find the union of two Django querysets?

Question

I’ve got a Django model with two custom manager methods. Each returns a different subset of the model’s objects, based on a different property of the object.

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Answer 1

Starting from version 1.11, django querysets have a builtin union method.

q = q1.union(q2) #q will contain all unique records of q1 + q2
q = q1.union(q2, all=True) #q will contain all records of q1 + q2 including duplicates
q = q1.union(q2,q3) # more than 2 queryset union

See my blog post on this for more examples.