插入假数据出错

数据生成工厂不用改，在UserSeeder里对时间数据进行格式化就好了，如下

// 前略
public function run()
{
    $users = factory(User::class)->times(50)->make();
    $data = array_map(function($u){
         $u['email_verified_at'] = date('Y-m-d H:i:s', strtotime($u['email_verified_at']));
         $u['created_at'] = date('Y-m-d H:i:s', strtotime($u['created_at']));
         $u['updated_at'] = date('Y-m-d H:i:s', strtotime($u['updated_at']));
         return $u;
     }, $users->makeVisible(['password','remeber_token'])->toArray() );
    User::insert($data);
    // 后略
}