Django filter on queryset intersection?
django, django-models, intersection, many-to-many, set
Solution
If you need your list of itemsets and you didn't get them from a query, try this:
itemset_list = [itemset1, itemset2, itemset3]
itemset_list_ids = [itemset.id for itemset in itemset_list]
itemset_queryset = ItemSet.objects.filter(id__in=itemset_list_ids)
items = Item.objects.filter(itemsets__in=itemset_queryset)
If you can get your itemset list by querying, that shortens it a little bit:
itemset_queryset = ItemSet.objects.filter(SOME FILTER HERE)
items = Item.objects.filter(itemsets__in=itemset_queryset)
Problem
``` class Item(models.Model): ... class ItemSet(models.Model): items = models.ManyToManyField(Item, related_name="itemsets") ``` I have a list of ItemSets. I want to find all Item objects where the Item object is in the "items" M2M field on at least one of the ItemSet objects. How can I do this? P.S. Here is what I have tried, but to no avail: ``` itemset_list = [itemset1, itemset2, itemset3] items = Item.objects.filter(itemsets__in=itemset_list) ```