Question

我不知道这个错误是什么原因造成的。我的代码中没有更改任何内容。但是当我进入我的搜索视图时。它总是返回未定义的属性错误。当我尝试预先我的表数据中的所有列时，会出现此错误。我已经解决了这个错误。因为找不到所选选项的$id。但这次我无法修复它。

错误：

未定义属性：stdClass :: $ id（查看：C：\ Users \ JohnFrancis \ LaravelFrancis \ resources \ views \ document \ show.blade.php）

查看

show.blade.php - 此视图将列出表格中的所有值。

@section ('content')

<div class = "col-md-12">

    <table class = "table">

        <thead>
            <tr>
                <th>Title</th>
                <th>Content</th>
                <th>Category</th>
                <th>Sender</th>
                <th>Date Received</th>
                <th>Action</th>
            </tr>
        </thead>

        <tbody>
            @foreach ($documentLists as $list)
                <tr class = "info">
                    <td>{{ $list->title }}</td>
                    <td>{{ strip_tags(substr($list->content, 0, 50)) }} {{  strlen($list->content) > 50 ? "..." : '' }}</td>
                    <td>{{ $list->category_type }}</td>
                    <td>{{ $list->username }}</td>
                    <td>{{ date('M j, Y', strtotime($list->dateReceived)) }}</td>
                    <td>
                        <a href = "{{ route ('document.read', $list->id) }}"><button type = "submit" class = "btn btn-info">Read</button></a>
                    </td>
                </tr>
            @endforeach
        </tbody>

    </table>

</div>

@endsection

read.blade.php - 它将重定向到当前选择的视图。

<!--DOCUMENT CONTROLLER-->
<div class = "col-md-6">

<form class = "vertical">

    <div class = "form-group">

        <textarea id = "content">{{ $documentLists->content }}</textarea>

    </div>

    <div class = "form-group">

        <button type = "submit" class = "btn btn-success">Approve</button>

    </div>

</form>

</div>

控制器

//SHOW
public function showDocuments()
{

    $documentLists = DB::table('document_user')->select('documents.title', 'documents.content', 'categories.category_type', 'users.username', 'document_user.dateReceived')
        //Table name     //PK                  //FK
        ->join('users', 'users.id', '=', 'document_user.sender_id')
        ->join('documents', 'documents.id', '=', 'document_user.document_id')
        ->join('categories', 'categories.id', '=', 'documents.category_id')
        ->where('sender_id', '!=', Auth::id())
        ->where('user_id', '!=', Auth::id())->get();

    //VIEW
    return view ('document.show')->with('documentLists', $documentLists);
}

//READ
public function readDocuments($id)
{
    //Find the document in the database and save as var.
    $documentLists = Document::find($id);

    return view ('document.read')->with('documentLists', $documentLists);
}

路由

Route::get('/show',
[
    'uses' => '\App\Http\Controllers\DocumentController@showDocuments',
    'as' => 'document.show',
    'middleware' => 'auth',
]);

Route::get('/receive/documents/{id}',
[
    'uses' => '\App\Http\Controllers\DocumentController@readDocuments',
    'as' => 'document.read',
    'middleware' => 'auth',
]);

Answer 1

在下面你没有选择id

class Program
    {
        static void Main(string[] args)
        {
            Console.WriteLine("Hallo, wie heißt du?");
            string name = Console.ReadLine();

            Program a = new Program();
            a.nameCheck(name);

            Console.WriteLine("Hallo " + name);


            Console.ReadLine();
        }
        private void nameCheck(string n)
        {
            if (n == "")
            {
                Console.WriteLine("Geben Sie einen Namen ein");
                n = Console.ReadLine();
            }
        }
    }

但请在您的刀片中调用$documentLists = DB::table('document_user')->select('documents.title', 'documents.

Answer 2

$documentLists = DB::table('document_user')->select('documents.id','documents.title', 'documents.content', 'categories.category_type', 'users.username', 'document_user.dateReceived');

你需要选择列文档。但是你错过了它

是什么原因未定义的属性：stdClass？

2 个答案: