django query exclude fields code example
Example 1: django filter on related field
len(Collection.objects.filter(item__flag=True).distinct())
Example 2: django 3.0 queryset examples
>>> Entry.objects.filter(
... headline__startswith='What'
... ).exclude(
... pub_date__gte=datetime.date.today()
... ).filter(
... pub_date__gte=datetime.date(2005, 1, 30)
... )