Question

I am doing this query to find the book with id “345” and which has a string “jack” in its owner array.

But it only lookes for the owner part and doesnt query id. Am i doing a syntax mistake?

Book.findOne({owner:{$in:["jack"]} },{_id:"345"},function(err,data)

Answer 1

Both the owner and _id properties of the find selector need to be in the same object:

Book.findOne({owner:{$in:["jack"]}, _id:"345"}, function(err,data) {...});