Rank 3: Container
I'm not sure if this suppose to happen, but if you select set null on document deletion it's not the behaviour I expected. I would expect when deleting the related document the attribute of the current document will be set null, but it prevent the deletion of the related document, and when you delete the current document it basically does nothing. I'm talking about one way relationship btw.
I have a user collection, and a stats collection. There is a relationship in user, which point to stats as one to one one way relation. I want to be able to freely delete the documents in stats collection and it will automatically set null on the user collection's relationship attribute.