node expressjs中怎么配置和组织mongoose模块？

config.js:

module.exports={
    uri:"mongodb://localhost/mydb01"
}

mongoose.js:

var mongoose = require('mongoose');
var config = require('./config.js');

module.exports = function(){
    var db = mongoose.connect(config.uri);

    require('../models/user.server.model.js');
    return db;
};

user.server.model.js:

var mongoose = require('mongoose');

var UserSchema = new mongoose.Schema({
  username:String,
  password:String,

});

mongoose.model('User', UserSchema);

在app.js中

var mongoose = require('./config/mongoose.js');
var db = mongoose();
var User = mongoose.model('User');//写到这一步就出错了，求问原因，谢谢！

写到上面最后一步就出错了，求问原因，谢谢！

---

var mongoose = require('./config/mongoose.js');
var db = mongoose();
var User = mongoose.model('User');//这里应该是 `User= require('./model/user.server.model.js')`

mongoose.model是注册user，不会挂在mongoose上面，你的app.js中的mongoose 是mongoose.js中export出来的db。

mongoose.js 还可以这么组织model

var mongoose = require('mongoose');
var config = require('./config.js');

module.exports = exports = function(){
    var db = mongoose.connect(config.uri);

    exports.User = require('../models/user.server.model.js');
    exports.Other = require('../models/other.server.model.js');
    return export;
};

app.js 这么用

var db = require('./config/mongoose.js')();
var User = db.User;
var Other = db.Other;