Mongodb |コメントをポピュレート投稿

Question

私はポスト/コメントシステムを作っています。ここでは、ユーザーが投稿にコメントできるようにしたい（私の場合は「キャプチャ」と呼ばれます）。

私は現在、投稿の作成以外はすべて設定しています。

私は別々の文書にコメントを追加することができますし、私は彼らがrefrencedてしまったが、私は移入Methodeのを追加しようとすると、それは何もしません。

router.get('/captures/:capture', function(req, res){ 
     Capture.findOne({_id: req.params.capture}, function(err, data){ 
      if(err) 
       throw err; 
      req.capture.populate('comments'); 
      res.json(data); 
     }); 
    }); 

これを実行すると、そうでありませんエラーは発生しますが、それには値が設定されません。 私は単にコメントのidを取得しますが、 'キャプチャ'には値が設定されません。

console.log($scope.capture.comments); 

ができます：

capture.jsルート：

var Capture = require('../models/capture'); 
var Comment = require('../models/comment'); 

module.exports = function(router) { 
    router.post('/captures', function(req, res){ 
     var capture = new Capture(); 
     capture.birdname = req.body.birdname; 
     capture.place = req.body.place; 
     capture.userId = req.body.userId; 
     capture.author = req.body.author; 
     capture.picture = req.body.picture; 
     capture.created_at = new Date(); 


     capture.save(function(err, data){ 
      if(err) 
       throw err; 
      console.log(req.body); 
      res.json(data); 
     }); 
    }); 

    // Map logic to route parameter 'capture' 
    router.param('capture', function(req, res, next, id) { 
     var query = Capture.findById(id); 

     query.exec(function (err, capture) { 
      if (err) { return next(err); } 
      if (!capture) { return next(new Error("can't find post")); } 

      req.capture = capture; 
      return next(); 
     }); 
    }); 
    // Map logic to route parameter 'comment' 
    router.param('comment', function (req, res, next, id) { 
     var query = Comment.findById(id); 

     query.exec(function (err, comment) { 
      if (err) { return next(err); } 
      if (!comment) { return next(new Error("can't find comment")); } 

      req.comment = comment; 
      return next(); 
     }); 
    }); 

    router.get('/captures/:capture', function(req, res){ 
     Capture.findOne({_id: req.params.capture}, function(err, data){ 
      if(err) 
       throw err; 

==========> As you can see here, I'm trying to populate the given id 
==========> with the comments. Currently when I console log on my capture, 
==========> it only gives back the id, but I want it to be populated with 
==========> the corresponding comments. 

      req.capture.populate('comments'); 
      res.json(data); 
    }); 
}); 

    router.post('/captures/:capture/comments', function(req, res, next){ 
     var comment = new Comment(); 
     comment.body = req.body.body; 
     comment.userId = req.body.userId; 
     comment.author = req.body.author; 
     comment.created_at = new Date(); 
     comment.capture = req.capture; 

     comment.save(function(err, comment) { 
      if (err) { return next(err); } 

      req.capture.comments.push(comment); 
      req.capture.save(function(err, capture) { 
       if (err) { return next(err); } 

       res.json(comment); 
      }); 
     }); 
    }); 
}; 

キャプチャモデル：

これは私の完全なコードです

["5744bafc1460f5bf18c17ac0", "5744bd4cfcd57403198f0987"] 

var mongoose = require('mongoose'); 
var Schema = mongoose.Schema; 
var captureSchema = Schema({ 
    birdname: {type: String, required: true}, 
    place: String, 
    userId: String, 
    author: String, 
    picture: Schema.Types.Mixed, 
    created_at: Date, 
    comments: [{ type: mongoose.Schema.Types.ObjectId, ref: 'Comment'}] 
}); 

module.exports = mongoose.model('Capture', captureSchema); 

コメントモデル：

var mongoose = require('mongoose'); 
var Schema = mongoose.Schema; 
var commentSchema = Schema({ 
    body: String, 
    userId: String, 
    author: String, 
    created_at: Date, 
    capture: [{ type: Schema.Types.ObjectId, ref: 'Capture'}] 
}); 

module.exports = mongoose.model('Comment', commentSchema); 

Answer 1

このため必要はありません。

Capture.findOne({_id: req.params.capture}, function(err, data) 

ちょうど次の手順を実行し、それが動作するはずです：

router.get('/captures/:capture', function(req, res) { 
     req.capture.populate('comments', function (err, capture) { 
     res.json(capture); 
    }); 
});