Copy documents from one collection to another

[Doug_Duncan]

@Stennie_X

Selection of existing fields and creation of new fields can be done within a $project stage, so an $addFields stage would not be needed for this use case.

Of course you’re right @Stennie_X. Sometimes I don’t stop and think of the solution I propose, and would have compressed those stages into a single one when writing out the query in real time.