update() function disregards limit()

[Sriharivignesh]

Lets say I have a 10 documents of Item in the database.

Lets retrieve 3 documents of Item matching some condition using limit().

documents = Item.objects(somefield=somecondition).limit(3)

Now if I do

documents.update(), mongoengine updates all the documents in the database matched by the query not just the 3 documents I have limited my query to.

Hope this gets fixed.

[erdenezul]

I added a test for your case. it is surely failing.

[Sriharivignesh]

@erdenezul thank you!

[zhangqiongyu]

It is a bug

[erdenezul]

yeah i have added failing test

[pchristos]

Any updates on this one?

[bagerard]

I understand the confusion but AFAIK I don't think there is an easy way to do this in pymongo. It does not look like pymongo's update_many allows to handle a limit

[bagerard]

@erdenezul Since update_many can't deal with a limit, it will be tricky to get this working and the current behavior is misleading. Maybe the safest is to raise an error if using .limit() with .update(), what do you think?

[erdenezul]

Yeah I agree with you. It is so tricky to fix that