Django subquery using QuerySet

Question

Is it possible to subquery a QuerySet using another QuerySet?

For instance:

q = Something.objects.filter(x=y).extra(where=query_set2)

Answer 1

Short answer: None. extraThe method does not wait for the transfer of requests.

If you think about it a little, it makes sense. Querysets is an abstraction used to represent the results of a fetch operation in a database, and extrais a convenient way to bind custom fields from a database to a set of queries. If you do not change the fundamental nature of extra“user filtering using a different set of queries”, this will not work.

Answer 2

.

• , :

  q = Something.objects.filter(x=y, w=z)
  

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