调用未定义的方法 stdClass::toJson()
Posted
技术标签:
【中文标题】调用未定义的方法 stdClass::toJson()【英文标题】：Call to undefined method stdClass::toJson() 【发布时间】：2019-11-20 18:16:06 【问题描述】：我正在尝试观看有关如何在 laravel 中应用 websockets 以便拥有实时评论系统的视频，但我收到了这个错误，我不知道为什么。我遵循了他在系统中输入的每一个代码。有人知道我为什么会收到此错误？
shownews.blade.php
Comment Area
<h4 class="comments-title" > <span class="fas fa-comment-alt"></span>
$news->comments()->count()
Comments</h4>
<div class="row" >
<div class="col-md-12 col-md-offset-2" style="overflow-y: scroll; height: 400px;
width: 400px; " id="commentarea" >
@foreach($news->comments as $comment)
<div class="comment" style="background-color: #f6efef;" >
<div class="author-info">
<img src="https://www.gravatar.com/avatar/" . md5(strtolower(trim($comment->email))) . "?s=50&d=retro" class="author-image" id="image">
<div class="author-name">
<h4>$comment->name </h4>
<p class="author-time"> date('F nS, Y - g:iA' ,strtotime($comment->created_at)) </p>
</div>
</div>
<div class="comment-content">
$comment->comment
</div>
</div>
@endforeach
</div>
</div>
Comment Form
<div class="row">
<div class="col-md-4 col-12 form-group">
<label for="">Name</label>
<input type="text" placeholder="Name" v-model="username" required >
</div>
<div class="col-md-4 col-12 form-group">
<label>Email</label>
<input type="email" placeholder="Email" v-model="email" required >
</div>
</div>
<div class="row">
<div class="col-12 form-group">
<textarea class="form-control" cols="30" rows="10" placeholder="Comment" v-model="commentBox"></textarea>
</div>
</div>
<div class="form-submit">
<button class="btn btn-warning" style="margin-top:10px" @click.prevent="postComment">Save Comment</button>
</div>
-- </form> --
</div>
</div>
@section('scripts')
<script>
const app = new Vue(
el: '#app',
data:
comments:,
commentBox = '',
username = '',
email = '',
article:!! $news->toJson() !!,
,
mounted()
this.getComments();
,
methods:
getComments()
axios.get(`/api/article/$this.news.id/comments`)
.then((response)=>
this.comments = response.data;
)
.catch(function(error)
console.log(error);
);
,
postComment()
axios.post(`/api/article/$this.news.id/comment`,
name: this.username,
email: this.email,
comment: this.commentBox
)
.then((response)=>
this.comments.unshift(response.data);
this.commentBox = '';
)
.catch(function(error)
console.log(error);
);
);
</script>
@endsection
CommentsController.php
<?php
namespace App\Http\Controllers;
use Illuminate\Http\Request;
use App\Comment;
use App\News;
use App\Graph;
use Validator;
use Session;
use Response;
class CommentsController extends Controller
/**
* Display a listing of the resource.
*
* @return \Illuminate\Http\Response
*/
public function index(News $news)
//
return response()->json($news->comments());
/**
* Store a newly created resource in storage.
*
* @param \Illuminate\Http\Request $request
* @return \Illuminate\Http\Response
*/
public function store(Request $request, $news_id)
//
$this->validate($request, array(
'name'=> 'required | max:255',
'email'=> 'required| email | max:255',
'comment'=> 'required | min:5'
));
$news = News::find($news_id);
$comment = new Comment();
$comment->name = $request->name;
$comment->email = $request->email;
$comment->comment = $request->comment;
$comment->approved = true;
$comment->news()->associate($news);
$comment->save();
return $comment->toJson();
// return redirect()->route('article', [$news->id]);
NewsController.php
<?php
namespace App\Http\Controllers;
use DB;
use Illuminate\Http\Request;
use App\News;
use Validator;
use Image;
use View;
use Storage;
use Illuminate\Support\Facades\Input;
use Response;
// use App\Http\Controllers\Controller;
class NewsController extends Controller
//Admin CRUD methods for news here. I diidnt include the code here because its for admin
public function showNews($id)
$all = DB::table('news')->get();
$news = News::find($id);
return View::make('coin.shownews', compact('news','all'));
api.php - 我跟着视频。他使用 api 路由以将数据作为 json 传递。
<?php
use Illuminate\Http\Request;
Route::get('article/id','NewsController@showNews');
Route::post('comments/news_id', 'CommentsController@store');
Route::middleware('auth:api')->group(function ()
);
web.php
//comments
//show Individual News with Comments
Route::group(['middleware'=>['web']], function()
Route::get('/article/id', 'NewsController@showNews')->name('article');
);
Route::post('comments/news_id', ['uses' => 'CommentsController@store', 'as' => 'comments.store']);
Route::get('comments/id/edit',['uses'=>'CommentsController@edit', 'as' => 'comments.edit']);
Route::put('comments/id',['uses'=>'CommentsController@update', 'as' => 'comments.update']);
Route::delete('comments/id',['uses'=>'CommentsController@destroy', 'as' => 'comments.destroy']);
路线列表
+--------+-----------+------------------------+------------------+-------------------------------------------------------------------+------------+
| Domain | Method | URI | Name | Action | Middleware |
+--------+-----------+------------------------+------------------+-------------------------------------------------------------------+------------+
| | GET|HEAD | / | | App\Http\Controllers\GraphController@index | web |
| | GET|HEAD | adminlogin | login | App\Http\Controllers\Auth\LoginController@showLoginForm | web,guest |
| | POST | adminlogin | | App\Http\Controllers\Auth\LoginController@login | web,guest |
| | GET|HEAD | api/article/id | | App\Http\Controllers\NewsController@showNews | api |
| | POST | api/comments/news_id | | App\Http\Controllers\CommentsController@store | api |
| | GET|HEAD | article/id | article | App\Http\Controllers\NewsController@showNews | web |
| | PUT | comments/id | comments.update | App\Http\Controllers\CommentsController@update | web |
| | DELETE | comments/id | comments.destroy | App\Http\Controllers\CommentsController@destroy | web |
| | GET|HEAD | comments/id/edit | comments.edit | App\Http\Controllers\CommentsController@edit | web |
| | POST | comments/news_id | comments.store | App\Http\Controllers\CommentsController@store | web |
| | GET|HEAD | home | home | App\Http\Controllers\HomeController@index | web |
| | GET|HEAD | logout | | App\Http\Controllers\HomeController@logout | web |
| | GET|HEAD | news | news.index | App\Http\Controllers\NewsController@index | web |
| | POST | news | news.store | App\Http\Controllers\NewsController@store | web |
| | GET|HEAD | news/create | news.create | App\Http\Controllers\NewsController@create | web |
| | PUT|PATCH | news/news | news.update | App\Http\Controllers\NewsController@update | web |
| | GET|HEAD | news/news | news.show | App\Http\Controllers\NewsController@show | web |
| | DELETE | news/news | news.destroy | App\Http\Controllers\NewsController@destroy | web |
| | GET|HEAD | news/news/edit | news.edit | App\Http\Controllers\NewsController@edit | web |
| | GET|HEAD | register | register | App\Http\Controllers\Auth\RegisterController@showRegistrationForm | web,guest |
| | POST | register | | App\Http\Controllers\Auth\RegisterController@register | web,guest |
| | POST | roadmap | roadmap.store | App\Http\Controllers\RoadmapController@store | web |
| | GET|HEAD | roadmap | roadmap.index | App\Http\Controllers\RoadmapController@index | web |
| | GET|HEAD | roadmap/create | roadmap.create | App\Http\Controllers\RoadmapController@create | web |
| | GET|HEAD | roadmap/roadmap | roadmap.show | App\Http\Controllers\RoadmapController@show | web |
| | PUT|PATCH | roadmap/roadmap | roadmap.update | App\Http\Controllers\RoadmapController@update | web |
| | DELETE | roadmap/roadmap | roadmap.destroy | App\Http\Controllers\RoadmapController@destroy | web |
| | GET|HEAD | roadmap/roadmap/edit | roadmap.edit | App\Http\Controllers\RoadmapController@edit | web |
| | GET|HEAD | test | | App\Http\Controllers\GraphController@test | web |
| | GET|HEAD | users | users.index | App\Http\Controllers\UserController@index | web |
| | POST | users | users.store | App\Http\Controllers\UserController@store | web |
| | GET|HEAD | users/create | users.create | App\Http\Controllers\UserController@create | web |
| | GET|HEAD | users/user | users.show | App\Http\Controllers\UserController@show | web |
| | DELETE | users/user | users.destroy | App\Http\Controllers\UserController@destroy | web |
| | PUT|PATCH | users/user | users.update | App\Http\Controllers\UserController@update | web |
| | GET|HEAD | users/user/edit | users.edit | App\Http\Controllers\UserController@edit | web |
+--------+-----------+------------------------+------------------+-------------------------------------------------------------------+------------+
【问题讨论】：
您收到一条错误消息。发生这种情况时，它往往会包括发生错误的文件和行号。请告诉我们发生错误的位置，并仅保留与问题直接相关的代码。现在，您已经发布了很多 代码，甚至没有指出错误发生的哪里。不要让我们经历这一切并猜测它发生在哪里...... 好的，对不起，先生。我认为这段代码article:!! $news->toJson() !! 给了我错误。对此先生有什么想法吗？它在我的刀片文件中。我不知道为什么会出现这个错误
有人可以帮我解决这个问题吗？
【参考方案1】：
您的$comment 变量是Object type。没有toJson property。如果您想将return 设为JSON，请使用response。
return response()->json(['comment' => $comment]);
【讨论】：
它仍然给我一个错误，先生。但是当我删除刀片文件中的article:!! $news->toJson() !! 代码时，它不会引发错误。但我无法检索或保存 cmets
我需要帮助 T_T以上是关于调用未定义的方法 stdClass::toJson()的主要内容，如果未能解决你的问题，请参考以下文章
调用未定义的方法 App\Models\Catering::search() [关闭]
未调用自定义 UIButton 的 setIsSelected 方法
调用未定义的方法 Cake\ORM\Entity::query() CakePhp