Sequelize classMethods vs instanceMethods

所以开始我的冒险进入Node的所有事情.我正在努力学习的工具之一是Sequelize.所以我将开始我想要做的事情:

'use strict';
var crypto = require('crypto');

module.exports = function(sequelize, DataTypes) {
  var User = sequelize.define('User', {
    username: DataTypes.STRING,
    first_name: DataTypes.STRING,
    last_name: DataTypes.STRING,
    salt: DataTypes.STRING,
    hashed_pwd: DataTypes.STRING
  }, {
    classMethods: {

    },
    instanceMethods: {
      createSalt: function() {
        return crypto.randomBytes(128).toString('base64');
      },
      hashPassword: function(salt, pwd) {
        var hmac = crypto.createHmac('sha1', salt);

        return hmac.update(pwd).digest('hex');
      },
      authenticate: function(passwordToMatch) {
        return this.hashPassword(this.salt, passwordToMatch) === this.hashed_pwd;
      }
    }
  });
  return User;
};

this.createSalt();
this.classMethods.createSalt();
createSalt();

authenticate: function(passwordToMatch) {
  console.log(this.createSalt());
  return this.hashPassword(this.salt, passwordToMatch) === this.hashed_pwd;
}

// Should be a classMethods
function getMyFriends() {
  return this.find({where{...}})
}

// Should be a instanceMethods
function checkMyName() {
  return this.name === "george";
}