What is the cause for the degradation of environment?
Capitalism, corruption, consuming society? - OVERPOPULATION!
Please, save the Planet - kill yourself...

Showing posts with label HowTo. Show all posts
Showing posts with label HowTo. Show all posts

Tuesday, October 16, 2018

Chaining AND operators in Django

Sometimes in Dango you need to compose query with several  `Q(query) & Q(other_query) &...` and the number of such queries changes dynamically. Here is a quick example how to solve it:

import operator

ids = [1, 2, 3]
queries = [Q(some_m2m_relation__pk=pk) for pk in id]
result = SomeModel.objects.filter(
    reduce(operator.and_, queries)
)