合并两个 Laravel Eloquent 查询

Question

我有一个 Laravel 项目并使用：

User.php 作为模型

public function posts() {
        return $this->hasMany(Post::class, 'user_id');
    }

public function feedPosts() {
        return $this->hasManyThrough(Post::Class, Follow::Class, 'user_id', 'user_id', 'id', 'followeduser');
    }

UserController.php 作为控制器

public function showCorrectHomepage(User $username) {
    $this->getSharedData($username);
    return view('homepage-feed', ['posts' => auth()->user()->feedPosts()->latest()->paginate(10)]); 
   }

homepage-feed.blade.php 作为视图

@foreach($posts as $post)
  <a href="/post/{{$post->id}}" class="list-group-item list-group-item-action">
    <img class="avatar-tiny" src="{{$post->findUser->avatar}}" />
    <strong>{{$post->title}}</strong> 
    <span class="text-muted small">
    vom {{$post->created_at->format('d.m.Y')}} geschrieben um {{$post->created_at->format('H:i')}} Uhr
    </span>
 </a>
@endforeach

一切都很好。

• User.php 模型中的“feedPosts”函数返回用户已订阅的帖子。

• User.php 模型中的“posts”函数返回用户撰写的帖子。

• 目前，用户订阅的帖子显示在主页提要视图中。

• 目标是显示用户已订阅并自己撰写的帖子。

我还没有设法合并这两个查询。不过，我也是 Laravel 初学者。

我已经尝试过了

public function showCorrectHomepage(User $username) {
    $this->getSharedData($username);
    $usersposts = auth()->user()->posts()->latest()->get();
    $usersabos = auth()->user()->feedPosts()->latest()->get();
    $allposts = $userposts->union($userabos)->paginate(10);
    return view('homepage-feed', ['posts' => $allposts); 
   }

但总有一些我不明白的错误。

如有任何帮助，我将不胜感激。非常感谢！ 最好的问候丹尼斯

Answer 1

有两种方法可以解决这些问题。决定您需要哪一个。希望您能得到想要的解决方案

1. 使用unionAll和手动分页

   公共函数showCorrectHomepage（用户$用户名）{

   $this->getSharedData($username);
   $userPosts = auth()->user()->posts()->latest();
   $feedPosts = auth()->user()->feedPosts()->latest();
   
   // Combine the queries using unionAll
   $allPosts = $userPosts->unionAll($feedPosts)->get();
   
   // Manually paginate the combined results
   $currentPage = LengthAwarePaginator::resolveCurrentPage();
   $perPage = 10;
   $currentPageResults = $allPosts->slice(($currentPage - 1) * $perPage, $perPage)->all();
   
   $paginatedPosts = new LengthAwarePaginator($currentPageResults, $allPosts->count(), $perPage);
   return view('homepage-feed', ['posts' => $paginatedPosts]);
   

   }

2. 使用 Eloquent 集合和分页

   公共函数showCorrectHomepage（用户$用户名）{

    $this->getSharedData($username);
   
    // Get the posts written by the user
    $userPosts = auth()->user()->posts()->latest()->get();
   
    // Get the posts from the users the user follows
    $feedPosts = auth()->user()->feedPosts()->latest()->get();
   
    // Merge the two collections
    $allPosts = $userPosts->merge($feedPosts)->sortByDesc('created_at');
   
    // Paginate the combined collection
    $paginatedPosts = new LengthAwarePaginator(
        $allPosts->forPage(LengthAwarePaginator::resolveCurrentPage(), 10), 
        $allPosts->count(), 
        10
    );
   
    return view('homepage-feed', ['posts' => $paginatedPosts]);
   

   }