I have an object like this
==================records=========={ Id: 5114a3c21203e0d811000088, userId: \'test\', sUserId: test, userName: \'test\', ur
Just use,
var convertedJSON = JSON.parse(JSON.stringify(mongooseReturnedDocument);
and Then,
convertedJSON.newProperty = 'Hello!'
'Hello!' can be anything, a number, a object or JSON Object Literal.
Cheers! :)