Question

我想实现vatting架构，我创建了mongoose架构，如下所示，我希望按chosen填充投票和分组，其中选择的是participantId。查询贝娄将返回未分组的所有选票。

var ParticipantSchema = new Schema({
   firstName: String,
   lastName: String
});

var VoteSchema = new Schema({
   userId:{type:Schema.ObjectId, ref:'User'},
   competitionId:{type:Schema.ObjectId, ref:'Competition'},
   chosen:String,
});

var CompetitionSchema = new Schema({
   name: String,
   type: String,
   votes:[{ type: Schema.ObjectId, ref: 'Vote'}],
   participants: [ParticipantSchema]
});

var Competition = mongoose.model('Competition', CompetitionSchema);
var Vote = mongoose.model('Vote', VoteSchema);



    //query 
    var name = decodeURIComponent(req.query.name);

    var options = [{
        $group: {
            _id: '$chosen',
            count: {$sum: 1}
        }
    }, {
        "$sort": {"count": -1}
    }];
    Competition.findOne({name: name})
        .populate({path: 'votes', select: 'chosen', options: options})
        .exec(function (err, result) {
                 console.log(result)
         });

它打印所有未分组的投票

 ...,
 "votes": [
  {
    "_id": "583d432c7ca0854f9c81a898",
    "chosen": "583b0afc0cc87818f02fed2f"
  },
  {
    "_id": "583d6af17e6b7e2b98c01f3b",
    "chosen": "583b07da0cc87818f02fed2e" //the same
  },
  {
    "_id": "583d6b147e6b7e2b98c01f3c",
    "chosen": "583b07da0cc87818f02fed2e" //the same
  }
],
 ...

任何解决方案或建议。谢谢

如何在mongoose中填充和填充填充字段

0 个答案: