后台代码

    //专题详情
    public function show(Topic $topic){
        //文章数
        $topic = Topic::withCount('postTopics')->find($topic->id);
        //专题的文章列表
/*        $posts = DB::table('post_topics')
            ->where('post_topics.topic_id',$topic->id)
            ->leftJoin('posts','post_topics.post_id','=','posts.id')
            ->get();
        if($posts->count()>0){
            foreach ($posts as $key=>$value){
                $posts[$key]->user = DB::table('users')->where('id',$value->user_id)->first();
            }
        }*/
        $posts = $topic->posts()->orderBy('created_at','desc')->take(10)->get();
        //属于我的文章，不属于该专题的文章
        $myposts = \App\Post::authorBy(\Auth()->id())->topicNot($topic->id)->get();
        return view('topic/show',compact(['topic','posts','myposts']));
    }

页面循环代码

<div class="tab-content">
    <div class="tab-pane active" id="tab_1">
        @if(!empty($posts))
            @foreach($posts as $post)
                <div class="blog-post" style="margin-top: 30px">
                    <p class="">
                        <a href="/user/{{$post->user->id}}">{{$post->user->name}}</a> {{$post->created_at->diffForHumans()}}
                    </p>
                    <p class="">
                        <a href="/posts/{{$post->id}}">{{$post->title}}</a>
                    </p>
                    {!! Str::limit($post->content,100) !!}
                </div>
            @endforeach
        @endif
    </div>
</div>

专题有文章的显示不好报错

没有文章的专题访问

这个问题已经问了好几次了，希望能真正的解决一下问题QAQ，很迷惑，实在不行麻烦加QQ看下代码+1491363753
我的laravel版本是7.0的