Mongoose uses the mongodb-native driver, which uses the custom ObjectID type. You can compare ObjectIDs with the .equals()
method. With your example, results.userId.equals(AnotherMongoDocument._id)
. The ObjectID type also has a toString()
method, if you wish to store a stringified version of the ObjectID in JSON format, or a cookie.
If you use ObjectID = require("mongodb").ObjectID
(requires the mongodb-native library) you can check if results.userId
is a valid identifier with results.userId instanceof ObjectID
.
Etc.