在使用babel-node运行sequelize项目，执行create的时候，会报如下错误

TypeError: Class constructor Model cannot be invoked without 'new'

这个问题，找了很久没找到解决方案，暂时的处理方法，就是把es6写法改成define的方式。

比如

class TestUser extends Sequelize.Model{
}
TestUser.init({
    id: {
        type: Sequelize.INTEGER,
        allowNull: false,
        primaryKey: true,
        autoIncrement: true
    },
    title: {
        type: Sequelize.STRING
    }
}, {
    sequelize: sequelize,
    modelName: 'test_users',
    underscored: true,
    underscoredAll: true
});

改成

let TestUser = sequelize.define('TestUser',{
        id: {
       type: Sequelize.INTEGER,
       allowNull: false,
       primaryKey: true,
       autoIncrement: true
   },
   title: {
       type: Sequelize.STRING
   }
},{
   modelName: 'test_users',
   underscored: true,
   underscoredAll: true
});

这样就可以了