:joy:掉坑里了。

Route::get('/publish/{post}', 'PostController@publish')
        ->name('publish_post,post')
        ->middleware('can:publish-post');

这里的middelware应该为：

Route::get('/publish/{post}', 'PostController@publish')
        ->name('publish_post,post')
        ->middleware('can:publish-post,post');

没把post带过去，缺少参数，报错。

Type error: Too few arguments to function App\Providers\AuthServiceProvider::App\Providers\{closure}(), 1 passed in /var/www/html/laravel/vendor/laravel/framework/src/Illuminate/Auth/Access/Gate.php on line 338 and exactly 2 expected

赞！思路清晰，过了两遍。哈！

:+1: 感谢楼主，拜读了！