thinkphp5 でのデータベース移行の移行

composer require topthink/think-migration

 use think\migration\Migrator;
 use think\migration\db\Column;
 
 class CreateUserTable extends Migrator
 {
   
   /**
   * 建立用户表
   */
   public function up(){
     $table = $this->table('user');
     $table->addColumn('username' , 'string' , ['limit' => 30])
        ->addColumn('passwork' , 'string' , ['limit' => 32])
        ->addColumn('email' , 'string' , ['limit' => 25])
        ->addColumn('lastlogin_ip' , 'string' , ['limit' => 15])
        ->addTimestamps('create_time' , 'lastlogin_time')
        ->addColumn('status' , 'integer' , ['limit' => 1 , 'default' => 1])
        ->setId('user_id')
        ->save();
   }
   
   /**
   * 提供回滚的删除用户表方法
   */
   public function down(){
     $this->dropTable('user');
   }
 }