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我正在尝试显示一段代码，同时显示您可以对这些片段进行的注释（我称之为片段代码）。但我无法查看发表每条评论的用户的用户名。我希望在打电话时有每个用户，with(array('user', 'comments', 'comments.user'))但我只是得到一个未处理的异常。

//Models
class Code extends Eloquent 
{
    public function user() {
        return $this->belongs_to('User');
    }

    public function comments() {
        return $this->has_many('Comment');
    }
}

class Comment extends Eloquent
{
    public function user() {
        $this->belongs_to('User');
    }

    public function code() {
        $this->belongs_to('Code');
    }
}

class User extends Eloquent 
{
    public function codes() {
        return $this->has_many('Code');
    }

    public function comments() {
        return $this->has_many('Comment');
    }
}
//Controller
    public function get_show($id)
    {
        //$code = Code::with(array('user', 'comments'))->where_slug($id)->first();
        //$comments = Comment::with(array('user'))->where_code_id($id)->get();
        $code = Code::with(array('user', 'comments', 'comments.user'))->where_slug($id)->first();
        dd($code);
        //return View::make('code.show')->with(array('code' => $code));
    }   

//View
    <h2>{{ $code->title }}</h2>
    @include('code.controls')
    <p>Syntax: {{ $code->syntax}} </p>
    <p><pre class="prettyprint linenums"><code class="language-{{ $code->syntax }}">{{ $code->content }}</code></pre></p>
    @foreach($code->comments as $comment)
        <div class="comment">
        <p><a href="">#{{ $comment->id }}</a></p>
        {{ User::find($comment->user_id)->first()->name }}
        <p>{{ $comment->body }}</p>
        </div>
    @endforeach

//Message when trying to view
Unhandled Exception
Message:

Creating default object from empty value

Location:

/home/victor/Projects/check-my-code/laravel/database/eloquent/query.php on line 167

Stack Trace:

#0 /home/victor/Projects/check-my-code/laravel/laravel.php(40): Laravel\Error::native(2, 'Creating defaul...', '/home/victor/Pr...', 167)
#1 /home/victor/Projects/check-my-code/laravel/database/eloquent/query.php(167): Laravel\{closure}(2, 'Creating defaul...', '/home/victor/Pr...', 167, Array)
#2 /home/victor/Projects/check-my-code/laravel/database/eloquent/query.php(140): Laravel\Database\Eloquent\Query->load(Array, 'user', NULL)
#3 /home/victor/Projects/check-my-code/laravel/database/eloquent/query.php(74): Laravel\Database\Eloquent\Query->hydrate(Object(Comment), Array)
#4 /home/victor/Projects/check-my-code/laravel/database/eloquent/query.php(186): Laravel\Database\Eloquent\Query->get()
#5 /home/victor/Projects/check-my-code/laravel/database/eloquent/query.php(140): Laravel\Database\Eloquent\Query->load(Array, 'comments', NULL)
#6 /home/victor/Projects/check-my-code/laravel/database/eloquent/query.php(74): Laravel\Database\Eloquent\Query->hydrate(Object(Code), Array)
#7 /home/victor/Projects/check-my-code/application/controllers/codes.php(31): Laravel\Database\Eloquent\Query->get()
#8 [internal function]: Codes_Controller->get_show('testar-snippets')
#9 /home/victor/Projects/check-my-code/laravel/routing/controller.php(325): call_user_func_array(Array, Array)
#10 /home/victor/Projects/check-my-code/laravel/routing/controller.php(285): Laravel\Routing\Controller->response('show', Array)
#11 /home/victor/Projects/check-my-code/laravel/routing/controller.php(165): Laravel\Routing\Controller->execute('show', Array)
#12 /home/victor/Projects/check-my-code/laravel/routing/route.php(153): Laravel\Routing\Controller::call('codes@show', Array)
#13 /home/victor/Projects/check-my-code/laravel/routing/route.php(124): Laravel\Routing\Route->response()
#14 /home/victor/Projects/check-my-code/laravel/laravel.php(125): Laravel\Routing\Route->call()
#15 /home/victor/Projects/check-my-code/public/index.php(34): require('/home/victor/Pr...')
#16 {main}
4

1 回答 1

1

类 Comment 中的方法缺少返回语句。

class Comment extends Eloquent
{
    public function user() {
        $this->belongs_to('User');
    }

    public function code() {
        $this->belongs_to('Code');
    }
}

应该

class Comment extends Eloquent
{
    public function user() {
        return $this->belongs_to('User');
    }

    public function code() {
        return $this->belongs_to('Code');
    }
}

从 Laravel 论坛上的一个帖子获得帮助：http ://forums.laravel.io/viewtopic.php?id=6266

于 2013-03-17T14:57:24.420 回答