Is it possible to receive a response about the absence of the requested data through the MongoDB aggregation pipeline?

Question

MongoDB

Hello!
Is it possible to make such a query to MongoDB in order to get in the response not only what is there, but also what is not there? For example, using the $match operator, I want to get data for users with ids 1, 2, and 3. But Mongo only has data for users 1 and 2. Can a response be returned that contains both data for users 1 and 2, and for the user 3 with a value like "Not Found"?

Answer 1

There is no such thing in MongoDB. As far as I know, even MySQL does not have such an option.
You can always invert the condition and substitute the inversion into the second query.