javascript - Node js aggregation and findone concept -

i need find history of person1 deals..so in gethistory module have filtered deals in person1's dealschema , in acceptreject function have used aggregation concept filter deals have person1's _d in accepted field. callback function acceptreject not fetch result results in []..anyone please findout mistake have done in code..thanks in advance

var acceptreject = function (userid, callback){//callback function finding accepted deal console.log("aggregate:" +userid); if(userid == null && userid == 'undefined'){  console.log("error fetching id");   res.send(new response.respondwithdata('failed','invalid userid'));   return next();   }  user.aggregate([  {    $unwind: "$deals"  },  {   "$match":    {   "deals.accepted": userid   //"deals.rejected": id    }    },   {   $project:{     "shopname":"$deals.shopname",     "deal":"$deals.deal",     "price":"$deals.price",     "name":"$name"   } } ],function (err, user){   console.log(user);   if (err){   callback (err);    }    console.log("your accepted deal:"+ user);  //  res.send(200,user);     callback(null, user);   })  } exports.gethistory = function (req, res, next) {   var incominguser = req.user;   var id = incominguser._id;   user.findbyid(id,function (err, user){    console.log(user);     if (err) {     return next(new response.respondwithdata('failed','cant find theuser'));     }    var dealobj = _.filter(user.deals);    acceptreject({     userid : id     },function(err, users){      if(err){      res.send(new restify.internaerror(err.message));      return next();      }     else{      console.log("final");      var final = {        accepteddeal: users,//it returns [] in result person1 accepted deal        mydeal: dealobj      }      next(res.send(200, final));    }   });   });   } 

and schema is

var dealschema = new mongoose.schema({  shopname: {type: string,required: true}, deal: {type: string,required: true}, price:{type: number,required: true}, start:{type: date,default: date.now},  end:{type: date}, expiry:{type: date}, comments:{type: string}, accepted: {type:mongoose.schema.types.objectid, ref:'user'},//person1 _id rejected: {type:mongoose.schema.types.objectid, ref: 'user'} }); var userschema = new mongoose.schema({  name: { type: string,required: true},  phone: { type: number, required: true,unique: true},  email:{type: string},  password: {type: string}, deals:[dealschema]  }, {collection: 'user'}); mongoose.model('deal', dealschema); mongoose.model('user', userschema); 

i have done mistake in callback function userid parameter of function not pass id

var accept= function (userid, callback){ console.log("aggregate:" +userid); if(userid == null && userid == 'undefined'){ res.send(new response.respondwithdata('failed','invalid userid')); return next(); } var id = new object(userid); console.log(id);   user.aggregate([  {    $unwind: "$deals"  },  {   "$match": {     "deals.accepted" : id   }   },  {   $project:{     "shopname":"$deals.shopname",     "deal":"$deals.deal",     "price":"$deals.price",     "name":"$name"   }   }  ],function (err, user){  console.log(user);  if (err){   callback(err);  }  console.log("your accepted deal:"+ user);   //res.send(200,user);    callback(null, user);  })  }