无法显示外键值

Question

我试图创建一个帖子和评论部分，我设法在一个页面中显示所有的帖子，现在我试图在每个帖子下面显示评论。在我的模型中，我连接了两个表，在我的函数中，我能够在使用dd();时查看帖子和注释--这是我的结果：

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我不确定我是否在我的视图中正确地调用了评论部分，因为我得到了错误：

属性activity_post_comments不存在于此集合实例上。(浏览: C:\xampp\xampp\htdocs\rsapp\resources\views\pages\timeline.blade.php)

我的职能：

public function timeline()
{
    $activityposts = ActivityPost::with('activity_post_comment')
                                ->orderBy('created_at','desc')
                                ->paginate(100);

    $posts = Post::orderBy('created_at','desc')->paginate(100);

    // dd($activityposts);

    return view('pages.timeline')
            ->with('posts', $posts)
            ->with('activityposts', $activityposts);
}

查看：

@if(count($activityposts) > 0)
    @foreach($activityposts as $activitypost)
    <div class="panel panel-default">
        <!--
        <div class="panel-heading"><a href="#" class="pull-right">View all</a>
        <h4>Bootply Editor &amp; Code Library</h4></div>
        -->
        <div class="panel-body">
            <p>
                <img src="../storage/user_image/{{ $activitypost->user->user_image }}" width="28px" height="28px">
                <b>{{ $activitypost->user->firstname }} {{ $activitypost->user->lastname }}</b>
                <span class="pull-right">{{ $activitypost->created_at->format('d-m-Y') }}</span>
            </p>
            <!--
                <div class="clearfix"></div>
                <hr>
            -->
            {{ $activitypost->status_update }}
            <hr>
            <div class="well"> 
                {{ $activitypost->activity_post_comments->activity_post_comments }};
            </div>
            <hr>
            <form class="form-horizontal" role="form" method="POST" enctype="multipart/form-data" action="{{ action('PagesController@storecomments', $activitypost->id) }}">
                {{ csrf_field() }}
                <div class="form-group{{ $errors->has('activity_post_comments') ? ' has-error' : '' }}">
                    <!-- <label for="activity_post_comments" class="col-md-4 control-label">First Name</label> -->
                    <div class="col-md-12">
                        <input id="activity_post_comments" type="text" class="form-control" name="activity_post_comments" required autofocus>
                        @if ($errors->has('activity_post_comments'))
                        <span class="help-block">
                        <strong>{{ $errors->first('activity_post_comments') }}</strong>
                        </span>
                        @endif
                    </div>
                </div>
                <button type="submit" class="btn btn-primary">Post</button>
            </form>
        </div>
    </div>
    @endforeach
{{$activityposts->links()}}
@else
<p>No new activity from users</p>
@endif

在这里我不确定：

{{ $activitypost->activity_post_comment->activity_post_comments }};

Answer 1

由于activity_post_comment将是一个集合，因此需要遍历相同的集合才能获得单独的实例。

@foreach ($activitypost->activity_post_comment as $comment)
<p>{{ $comment->activity_post_comments }}</p>
@endforeach

Answer 2

正如linktoahref所指出的，你不确定的事情是正确的。$activitypost和$activity_post_comment之间的关系是1-n，或者$activitypost将有一个$activity_post_comment集合，所以在使用集合时，可以使用for-循环或其他方便的助手方法。为循环可能是

@foreach ($activitypost->activity_post_comment as $comment)
<p>{{ $comment->activity_post_comments }}</p>
@endforeach

或者如果您只想要一个activity_post_comments数组

$activitypost->activity_post_comment->pluck('activity_post_comments')