subdocument in mongodb code example
Example: mongoose find by nested property
System.findOne({ 'nodes.main.Alpha': 23000}, function(err, system){
if(err){console.log(err);}
else{console.log(system);}
});
System.findOne({ 'nodes.main.Alpha': 23000}, function(err, system){
if(err){console.log(err);}
else{console.log(system);}
});