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Filtering by amount of relation items
Is there a way to build a query, to filter by the length of an array?
My collection "a" has an relationship to a collection "b". It is a one to many relationship. Now I would like to filter all items from collection "a" which has more then one "b" item.
TL;DR
Developers are asking if there is a query to filter by the length of an array in a one-to-many relationship. They want to filter items in collection "a" that have more than one item in collection "b". 