查询与猫鼬

Question

这是我的文件夹结构
- express_example
| ---- app.js
| ----车型
| -------- songs.js
| -------- albums.js
| ----和expressjs

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; 

的另一个文件

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); 

我怎么可以把代码查询册页相册ID文件album.js

Answer 1

例如：

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 
    });  
}); 

看到http://mongoosejs.com/docs/finding-documents.html以了解关于查找文档。

PS：这是我第三次回答了你的问题:)