select only subdocuments or arrays

Question

{
    \"_id\":{
        \"oid\":\"4f33bf69873dbc73a7d21dc3\"
    },
    \"country\":\"IND\",
    \"states\":[{
            \"name\":\"orissa\",
            \"direction\"         


        

Answer 1

If you don't want to use aggregate, you can do it pretty easily at the application layer using underscore (included by default):

var country = Groops.findOne({"property":value);
var state _.where(country, {"state":statename});

This will give you the entire state record that matches statename. Very convenient.