Question

我想展示链接的评论和显示用户和用户配置文件的评论关系......

DD（$ PAGE-＆GT; getRelation（＆＃39;链接＆＃39;））;

Collection {#318 ▼
  #items: array:2 [▼
    0 => Link {#317 ▼
      #relations: array:2 [▼
        "comments" => Collection {#327 ▼
              #attributes: array:5 [▼
                "id" => 3
                "content" => "teste"
                "link_id" => 1
                "user_id" => 1
                "created_at" => "2018-01-11 00:47:32"
              ]
              #relations: array:2 [▼
                "user" => User {#330 ▶}
                "userProfile" => UserProfile {#326 ▶}
              ]
            }
          ]
        }

在我看来：

        @foreach($page->getRelation('links') as $link)
        <div class="link">

    <!--show de comments of link (ONLY FOR EXPLANATION)-->
@foreach()
        <div class="comments">
        SHOW DE ATTRIBUTE OF COMMENT AND ATTRIBUTE OF RELATIONS OF COMMENT (user, userprofile)
        </div>
@endforeach

        </div>

        @endforeach

Answer 1

请查看Eager Loading

下的文档

Eloquent可以在您查询父模型时“急切加载”关系。急切加载缓解了N + 1查询问题。（...）查询时，您可以使用with方法指定哪些关系应该加载。

例如：

$pages = App\Page::with("link")->get();

foreach ($pages as $page) {
    echo $page->links->comments;
}

您还可以加载多个关系

$pages = App\Page::with(['link', 'author'])->get();

最后，您可以嵌套急切的加载关系

o eager load嵌套关系，您可以使用“dot”语法。对于让我们热切地加载这本书的所有作者和所有作者作者在一个雄辩的声明中的个人联系

$pages = App\Page::with('link.comments')->get();

Answer 2

首先加载控制器函数中的关系：

$page = Page::where($allYourConditions)->with(['links' => 
function($query){
  $query->with(['comments' => function($query){
    $query->with(['user', 'userProfile']);
  }]);
}])->get();

然后在视图文件中：

@foreach($page->links as $link)
  <div class="link">
  @foreach($link->comments as $comment)
    <div class="comment">
      <div class="comment-user">{{$comment->user}}</div>
      <div class="comment-user-profile">{{$comment->userProfile}}</div>
    </div>
  @endforeach
@endforeach

获取关系属性的关系

2 个答案: