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Alex Aktsipetrov 681f7e2b13 Fixed #20577 -- Deferred filtering of prefetched related querysets.
Added internal interface to QuerySet that allows to defer next filter
call till .query is accessed. Used it to optimize prefetch_related().

Thanks Simon Charette for the review.
2019-10-21 13:21:54 +02:00
..
2017-06-01 13:23:48 -04:00

To run the test suite, first, create and activate a virtual environment. Then
install some requirements and run the tests::

    $ cd tests
    $ python -m pip install -e ..
    $ python -m pip install -r requirements/py3.txt
    $ ./runtests.py

For more information about the test suite, see
https://docs.djangoproject.com/en/dev/internals/contributing/writing-code/unit-tests/.