Node.js 猫鼬查询

这是我的结构文件夹
--表示示例
app.js
----型号
--songs.js
--albums.js
|----和expressjs的另一个文件

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;

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);

album.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;

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);

如何在文件

album.js

中按相册id设置代码查询相册示例：

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;

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);

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
  });      
});

有关查找文档的详细信息，请参阅

---

附：这是我第三次回答你的问题：）

：）我三次得到你的回答，这对我很有用。我可以像函数一样将查询脚本放在文件

album.js

中吗？当我需要在单独的位置调用它时，可以使用该函数。对于简单的和内置的查询，不需要这样做，而且它通常由控制器而不是模型来处理。对于复杂查询，您可以向模型中添加新方法，请参见“确定”。。非常感谢你。我很高兴你对我的帮助。我会尽力帮助像你这样的人帮助我。