Querying a MongoDB based on Mongo ID in a node.js app

Question

I\'m using a node.js and mongodb, and I\'m trying to query the database based on the mongo generated ID using the following:

    collection.findOne( {_id:doc         


        

Answer 1

Use this:

ObjectId = require('mongodb').ObjectID;

Then when you try to find an object in collection by _id use this:

 console.log("find by: "+ id);
 database.collection("userRegister").findOne({_id: new ObjectId(id)}, 
   function(err, res) { 

     if (err) console.log(err);

     if(res!=null){
       console.log(res)
       return false;
     }

     if(res==null){
       callback({'status':_error,'flag':'notexist','message':_userNotExist});
       return false;
     }

   });