Question

这是我的控制器名为CommentController.php

namespace App\Http\Controllers;

use Illuminate\Http\Request;
use App\Comment;
use Auth;





class CommentsController extends Controller
{
/**
 * Display a listing of the resource.
 *
 * @return \Illuminate\Http\Response
 */
public function index()
{
    //
}

/**
 * Show the form for creating a new resource.
 *
 * @return \Illuminate\Http\Response
 */
public function create()
{
    //
    return view('comments.create');
}

/**
 * Store a newly created resource in storage.
 *
 * @param  \Illuminate\Http\Request  $request
 * @return \Illuminate\Http\Response
 */
public function store(Request $request)
{


    $comment= new Comment();
    $comment->user_id=Auth::user()->id;
    $comment->body=$request->body;
    $comment->save();
    return back();
}

/**
 * Display the specified resource.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function show()
{
    //

 $comments=comment::all();
 return view('comments',['comments'=>$comments]);
}

/**
 * Show the form for editing the specified resource.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function edit($id)
{
    //
}

/**
 * Update the specified resource in storage.
 *
 * @param  \Illuminate\Http\Request  $request
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function update(Request $request, $id)
{
    //
}

/**
 * Remove the specified resource from storage.
 *
 * @param  int  $id
 * @return \Illuminate\Http\Response
 */
public function destroy($id)
{
    //
}
}

这是我的布局代码，名为create.blade.html

     <html>
     <head>
     <h1>DONE</h1>


    </head>
    <body>
    <div class="row new-post">
        <div class="col-md-6 col-md-offset-3">

            <header><h3>Comments</h3></header>
            <form action="/comments" method="post">
            {{csrf_field()}}
                <div class="form-group">
                    <textarea class="form-control" name="body" id="new-post"            rows="5" placeholder="Your review on above game"></textarea>
                </div>
                <button type="submit" class="btn btn-primary">Post Comment</button>

            </form>
        </div>
    </div>

   <?php foreach($comments as $comment) ?>
   <h1><?php echo $comment ?> <h1>
  </body>
    </html>

这是我的路线代码，名为web.php

<?php



Route::get('/', function () {
return view('welcome');
});

Auth::routes();

Route::resource('comments','CommentsController');

Route::get('comments.create','CommentsController@show');
?>

现在，无论我提交的数据是在数据库中输入的，但是当我尝试显示该数据时，它会给我错误未定义的变量：注释。在此先感谢:-)

Answer 1

那是因为您没有从$comments方法传递create()变量，该变量看起来像这样：

public function create()
{
    $comments = comment::all();
    return view('comments.create', ['comments' => $comments]);
}

同时删除Route::get('comments.create'，因为尝试覆盖资源路由是个坏主意。使用create()显示表单，使用show()显示一条评论。

无法从我的laravel网站显示数据库

1 个答案: