is it possible tu $push ObjectId to array if value not exist and $pull if it exist ?

[Maks Yaremenko]

Hello everyone, i am just trying to update my model with the following way - $push ObjectId to array if value not exist and $pull it if not exist ?

Is it pissible? I know that i can use $addToSet if value not exist in array... but how can i remove the value if it exist, in the same query ?

thx. a lot!

[Richard Bateman]

You might want to ask this in a more generic mongodb group, since it's
not a mongoose-specific question.

That said, I can't think of a way that you could do that; what you
could do is use an unorderedbulkoperation and add two steps: one that
searches for records where the value exists and does a $pull and one
that searches for records which don't contain it and does a $push,
then execute it together.

You could do the same thing but slightly less efficiently just with
two update commands.

Richard

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