从空值创建默认对象以获取信息

Question

我正在尝试编辑和保存一些文章，但收到此错误：Creating default object from empty value。我的代码有什么问题？因为在编辑时我有我的subject，但是提交后我得到了这个错误。 我的错误： https://imgur.com/a/eWGqc5B 控制器

public function update($type, $id)

    {
        /* print_r(Input::all()); die;  */
        if($type == "News")
        {
            $article = \App\News::find($id);
            $article->subject = Request::input('subject');
            $article->public = Request::input('public');
            $article->category_id = Request::input('category_id');
            $article->information = Request::input('information');
            $article->update();
        }


        if($type == "Event")
        {

            $article = \App\Event::find($id);
            $article->subject = Request::input('subject');
            $comm->comments = Request::input('comments');
            $article->public = Request::input('public');
            $article->category_id = Request::input('category_id');
            $article->event_type_id = Request::input('event_type_id');
            $article->country = Request::input('country');
            $article->starts = Request::input('starts');
            $article->ends = Request::input('ends');
            $article->organizer = Request::input('organizer');
            $article->address = Request::input('address');
            $article->city = Request::input('city');
            $article->website = Request::input('website');
            $article->email = Request::input('email');
            $article->telephone = Request::input('telephone');
            $article->information = Request::input('information');
            $article->update();


        }


        return redirect(URL::previous());

ArticleController.php 中的第 669 行 $article->subject = Request::input('subject');

这是我的 editEvent 代码：https://codepen.io/anon/pen/YodwKO

我的 articles.blade 代码：https://codepen.io/anon/pen/jjXWOb

我的路线： ` Route::post('admin/article/update/{type?}/{id?}', ['as' => 'update.article', 'uses' => 'ArticleController@update']);

`

Answer 1

变量 $comm 未定义。好像打错字了。