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並前往https://helperbyte.com/questions/470681/as-for-django-to-add-a-computed-field-with-aggregation-and-subquery

As for Django to add a computed field with aggregation and ...

from django.db.models import Count, OuterRef, Subquery articles_of_type_a = Article.objects.filter(blog=OuterRef('id'), type='a') ...

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