node.js - Mongoose populate data key remove in got data -


i'm using relation between 2 collection , have collection schema follow.

// room database entry. {     "_id" : objectid("59b77082f7da4b1b3f64d927"),     "room_id" : "c3wqqkfndg9cnmi",     "room_name" : "bcmvnxbcnvsjkfhkjdh",     "users" : [         {             "_id" : objectid("59b77082f7da4b1b3f64d926")         }     ],     "__v" : 0 }  //user database entry, related above room entry. {     "_id" : objectid("59b77082f7da4b1b3f64d926"),     "user_id" : "dyr1qlrtso47vi",      "__v" : 0 }

when pass query room find , populate data found result follow.

// query room find , populate. room  .findone({ room_id: result.data.room_id })  .populate("users._id")  .exec(function(err, data){   });  //result follow {    "_id":"59b77082f7da4b1b3f64d927",    "room_id":"c3wqqkfndg9cnmi",    "room_name":"bcmvnxbcnvsjkfhkjdh",    "__v":0,    "users":[       {          "_id":{             "_id":"59b77082f7da4b1b3f64d926",             "user_id":"dyr1qlrtso47vi",             "__v":0          }       }    ] }

my requirement follow, don't want _id key of object. need users object follow.

"users":[       {          "_id":{             "_id":"59b77082f7da4b1b3f64d926",             "user_id":"dyr1qlrtso47vi",             "__v":0          }       }    ]  should   "users":[          {             "_id":"59b77082f7da4b1b3f64d926",             "user_id":"dyr1qlrtso47vi",             "__v":0          }      ]


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