javascript - Mongoose 种群

Question

我有这个 Mongoose 模式

var ItemSchema = new Schema({
    "name":String,
    "review": [{ type: Schema.Types.ObjectId, ref: 'Reviews'}]
});

评论的架构是:

var ReviewSchema = new Schema({
    "title": String, 
    "user": { type: Schema.Types.ObjectId, ref: 'Users' }
});

用户的模式是:

var UserSchema = new Schema({
   "name":String, 
   "surname":String,
});

这是获取项目的代码:

Item.findOne({_id:req.params.idItem})
    .populate('review')
    .exec(function (err, item) {
        console.log(item);
});

但此代码仅填充评论，我希望它也填充用户。

Answer 1

Item.findOne({_id:req.params.idItem})
  .populate({ 
     path: 'review',
     populate: {
       path: 'user'
     } 
  })
  .exec(function(err, item) {});

http://mongoosejs.com/docs/populate.html#deep-populate