in mangoDB, in order to extract some fields from a document and return them only, we use a projection feature like this:
collection.find().project({field: value});
this will return me only the field value for every document in the collection.
I have many documents in firestore, how can I project for the field(s) like this?
I can't use nested sub-collection since the database is large enough so it's hard.
Thank you
