title: Node.js Sequelize ORM model issue
body: <p>I am using Sequelize the Node.js ORM for my web application. Facing the following issue when i start my Node server. </p>
  
  <p>Following are the further details</p>
  
  <p><strong>Error</strong>: </p>
  
  <p>project_directory_path\node_modules\sequelize\lib\sequelize.js:322</p>
  
  <p><strong>model.init(attributes, options);</strong></p>
  
  <p><strong>TypeError: model.init is not a function</strong>
      at Sequelize.define (project_directory_path\node_modules\sequelize\lib\sequelize.js:322:11)
      at module.exports (project_directory_path\models\sequelize\app_config_setting.js:2:41)
      at Sequelize.import (project_directory_path\node_modules\sequelize\lib\sequelize.js:379:32)
      at project_directory_path\models\index.js:34:48
      at Array.forEach (native)
      at Object. (project_directory_path\models\index.js:31:6)
      at Module._compile (module.js:425:26)
      at Object.Module._extensions..js (module.js:432:10)
      at Module.load (module.js:356:32)
      at Function.Module._load (module.js:311:12)
      at Module.require (module.js:366:17)
      at require (module.js:385:17)
      at Object. (project_directory_path\server.js:12:14)
      at Module._compile (module.js:425:26)
      at Object.Module._extensions..js (module.js:432:10)
      at Module.load (module.js:356:32)
      at Function.Module._load (module.js:311:12)
      at Function.Module.runMain (module.js:457:10)
      at startup (node.js:136:18)
      at node.js:972:3</p>
  
  <p><strong>Version</strong>:</p>
  
  <p>node version v5.0.0,
  sequelize version: "^4.4.2",
  dialect: "mysql"</p>
  
  <p><strong>index.js</strong> file (to load all the models)</p>
  
  <pre><code>var fs = require('fs');
  var path = require('path');
  var sequelize = require('sequelize');
  var sequelizeConnection = 
  require('../configs/dbConnection.js').exposeSequelizeConnectionObj();
  var sequelizeModelDir = path.join(__dirname, 'sequelize');
  var dbModels = {};
  
  fs.readdirSync(sequelizeModelDir)
  
  //avoiding the index.js and all other files
  //expect the model files
  .filter(function (file) {
      return (file.indexOf(".") !== 0) &amp;&amp; (file !== "index.js");
  })
  
  //iterating on each models and importing it
  //in sequelize connection object
  .forEach(function (file) {
      var dir = 'sequelize/';
      var models = sequelizeConnection.import(path.join(sequelizeModelDir, file));
      dbModels[models.name] = models;
  });
  
  //exposing all the models
  module.exports = dbModels;
  dbModels.sequelize = sequelizeConnection;
  </code></pre>
  
  <p><strong>One of my model</strong> (just to get the idea)</p>
  
  <pre><code>module.exports = function (sequelize,DataTypes) {
  var roles = sequelize.define(
      'roles',
      {
          id: {autoIncrement: true, type: DataTypes.INTEGER(11), allowNull: false, primaryKey: true},
          role_name: {type: DataTypes.ENUM('super_admin'), allowNull: false},
          code_name: {type: DataTypes.ENUM('super_admin'), allowNull: false},
          row_status: {type: DataTypes.ENUM('active','inactive'), allowNull: true}
      },
      {
          timestamps: false,
          paranoid: true,
          freezeTableName: true,
          tableName: 'roles'
      }
  );
  return roles; };
  </code></pre>
  
  <p><strong>Database Connection file:</strong></p>
  
  <pre><code>var sequelize = require('sequelize');
  var sequelizeConnectionObj = new sequelize(process.env.DB_DATABASE_NAME, 
  process.env.DB_USERNAME, process.env.DB_PASSWORD, {
  host: process.env.DB_HOSTNAME,
  dialect: 'mysql',
  define: {
      timestamps: false
  },
  dialectOptions: {
      multipleStatements: true
  },
  logging: false,
  pool: {
      max: 15,
      min: 0,
      idle: 10000
     }
   });
  
     exports.exposeSequelizeConnectionObj = function connectSequelize() {
     return sequelizeConnectionObj;
    };
  </code></pre>