$user = User::get(['code' => 'x123']);
$user_data['count'] = ['exp','`count`+1'];
$user->save($user_data);
var_dump($user->getData('count'));
// var_dump($user->count);
// 返回结果震惊，居然是['exp','`count`+1']！ 最佳答案
$user = User::get(['code' => 'x123']);
$user_data['count'] = ['exp','`count`+1'];
$user->save($user_data);
var_dump($user->getData('count'));
// var_dump($user->count);
// 返回结果震惊，居然是['exp','`count`+1']！