用mongoose查询

Question

这是我的structure文件夹

-- express_example

|- app.js

|-模型

|- songs.js

|- albums.js

|-和另一个expressjs文件

song.js

var mongoose = require('mongoose')
, Schema = mongoose.Schema
, ObjectId = Schema.ObjectId;

var SongSchema = new Schema({
name: {type: String, default: 'songname'}
, link: {type: String, default: './data/train.mp3'}
, date: {type: Date, default: Date.now()}
, position: {type: Number, default: 0}
, weekOnChart: {type: Number, default: 0}
, listend: {type: Number, default: 0}
});

mongoose.model('Song', SongSchema);
module.exports = SongSchema;

album.js

var mongoose = require('mongoose')
, Schema = mongoose.Schema
, SongSchema = require('./songs')
, ObjectId = Schema.ObjectId;

var AlbumSchema = new Schema({
name: {type: String, default: 'songname'}
, thumbnail: {type:String, default: './public/images/album/unghoangphuc/U1.jpg'}
, date: {type: Date, default: Date.now()}
, songs: [SongSchema]
});

mongoose.model('Album', AlbumSchema);

如何将按专辑id查询专辑的代码放在文件album.js中

Answer 1

示例：

var mongoose = require('mongoose')
  , Album = mongoose.model('Album'); 

app.get('/posts/:id', function(req, res, next) {
  Album.findById(req.params.id, function(err, album) {
    // album is available here
  });      
});

请参阅http://mongoosejs.com/docs/finding-documents.html以了解有关查找文档的更多信息。

PS:这是我第三次回答你的问题了:)