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kyle-eshares/exist.py

Created October 17, 2016 20:02
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exist.py
# Don't waste a query if you are using the queryset
books = Book.objects.filter(..)
if books:
do_stuff_with_books(books)
# If you aren't using the queryset use exist
books = Book.objects.filter(..)
if books.exists():
do_some_stuff()
# But never
if Book.objects.filter(..):
do_some_stuff()
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