php - 调用未定义的方法 Illuminate\Validation\Rules\In::__set_state()

Question

我尝试了所有方法来解决这个问题，比如清除缓存、composer 更新/安装，但是在 php artisan config:cache 之后，它又出现了。

In config.php line 839:
Call to undefined method Illuminate\Validation\Rules\In::__set_state()

整个页面变成空白页。在 bootstrap/cache/config.php 文件中显示:

'environment' => 
    array (
      'form' => 
      array (
        'rules' => 
        array (
          'app_name' => 'required|string|max:50',
          'environment' => 'required|string|max:50',
          'environment_custom' => 'required_if:environment,other|max:50',
          'app_debug' => 
          array (
            0 => 'required',
            1 => 
            Illuminate\Validation\Rules\In::__set_state(array(
               'rule' => 'in',
               'values' => 
              array (
                0 => 'true',
                1 => 'false',
              ),
            )),
          ),

Answer 1

我也遇到了这个错误，因为不是

"Illuminate\Validation\Rule"

我放了

"Illuminate\Contracts\Validation\Rule"