如何在Node.js中的控制器中实例化模型？

Question

I am trying to use the model object in node through sequelize module.

I have something like these:

File structure:
models
  index.js
  user.js
controllers
  userController.js
routes
  route.js

==========================

models/users.js
//generated through sequelize cli
'use strict';
module.exports = function(sequelize, DataTypes) {
  var user = sequelize.define('user', {
    name: DataTypes.STRING,
    job: DataTypes.STRING
  }, {
    classMethods: {
      associate: function(models) {
        // associations can be defined here
      }
    }
  });
  return user;
};

models/index.js // generated file through sequelize.

controllers/userController.js

var model = require('../models/user');

var userController = function(){
    function createOne (req, res) {
         model.create({
             'name': 'John',
             'job':'manager'
         }).then(function(test){
             console.log(test);
         })
    }

    return {
        createOne: createOne        
    }
}

module.exports = userController;

When my route request userController.createOne() , I am getting model.create is not a function

I am not sure what the issue is and how to get model injected into the controller. Can anyone help me about it? Thanks a lot!

Update :

my models/index.js //generated by sequelize cli

'use strict';

var fs        = require('fs');
var path      = require('path');
var Sequelize = require('sequelize');
var basename  = path.basename(module.filename);
var env       = process.env.NODE_ENV || 'development';
var config    = require(__dirname + '../config/config.json')[env];
var db        = {};

if (config.use_env_variable) {
  var sequelize = new Sequelize(process.env[config.use_env_variable]);
} else {
  var sequelize = new Sequelize(config.database, config.username, config.password, config);
}

fs
  .readdirSync(__dirname)
  .filter(function(file) {
    return (file.indexOf('.') !== 0) && (file !== basename) && (file.slice(-3) === '.js');
  })
  .forEach(function(file) {
    var model = sequelize['import'](path.join(__dirname, file));
    db[model.name] = model;
  });

Object.keys(db).forEach(function(modelName) {
  if (db[modelName].associate) {
    db[modelName].associate(db);
  }
});

db.sequelize = sequelize;
db.Sequelize = Sequelize;

module.exports = db;

Answer 1

Normally you define the models individually, then let the models/index.js properly stage these into the Sequelize object. Later:

const models = require('../models');

const User = models.User;

Then you can call User.create() and so on. The bare model definition file is not a complete package.