ListModel.findOne({ "_id" : "57e6bcab6b383120f0395aed", 'recipients.status' : 1 }, { _id:1, name: 1, subject:1,'recipients.$': 1 }, function(err,list) {...} );
System.findOne({ 'nodes.main.Alpha': 23000}, function(err, system){ if(err){console.log(err);} else{console.log(system);} });