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Django
Performance
Looks like you need to determine the number of records. Django provides the count() method which is more efficient than .len(). See https://docs.djangoproject.com/en/3.0/ref/models/querysets/
Looks like you are only accessing first element of an ordered QuerySet. Use latest()
or earliest()
instead. See https://docs.djangoproject.com/en/3.0/ref/models/querysets/#django.db.models.query.QuerySet.latest
You should use ITEM.user_id rather than ITEM.user.id to prevent running an extra query.