Projections Projections You can give find and findOne an optional second argument, projections . The syntax is the same as MongoDB: { a: 1, b: 1 } to return only the a and ...
Logical operators $or, $and, $not, $where Logical operators $or, $and, $not, $where You can combine queries using logical operators: For $or and $and , the syntax is { $op: ...