MongoDB query to return only embedded document

Question

assume that i have a BlogPost model with zero-to-many embedded Comment documents. can i query for and have MongoDB return only Comme

Answer 1

The mongodb javascript shell is documented at http://docs.mongodb.org/manual/reference/method/

If you want to get back only specific fields of an object, you can use

db.collection.find( { }, {fieldName:true});

If, on the other hand, you are looking for objects which contain a specific field, you can sue

db.collection.find( { fieldName : { $exists : true } } );