如何使用collection map对laravel 7 eloquent中的数据进行排序？

Question

我有安心的代码来获取评论和回复。我想知道如何对回复进行排序：

$comments = Comment::where([
            ['commentable_type', 'App\Models\Posts\Post'],
            ['commentable_id', $post->id],
            ['parent_id', null]
])->with('replies')
          ->orderBy('created_at', 'desc')
          ->take(10)
          ->get()->map(function($comments) {
                $comments->setRelation('replies', $comments->replies->take(3));                
                return $comments;
});

我试过这样做：

$comments = Comment::where([
            ['commentable_type', 'App\Models\Posts\Post'],
            ['commentable_id', $post->id],
            ['parent_id', null]
])->with('replies')
          ->orderBy('created_at', 'desc')
          ->take(10)
          ->get()->map(function($comments) {
                $comments->setRelation('replies', $comments->replies->take(3));                                    
                $comments->setRelation('replies', $comments->replies)->orderBy('created_at', 'desc');
                return $comments;
});

还有

$comments = Comment::where([
            ['commentable_type', 'App\Models\Posts\Post'],
            ['commentable_id', $post->id],
            ['parent_id', null]
])->with('replies')
          ->orderBy('created_at', 'desc')
          ->take(10)
          ->get()->map(function($comments) {
                $comments->setRelation('replies', $comments->replies->take(3)->orderBy('created_at', 'desc'));
                return $comments;
});

但是没有用。

你能帮帮我吗？

此致

Answer 1

假设您想要每条评论的最后三个回复 - 这应该可行

$comments = Comment::where([
        ['commentable_type', 'App\Models\Posts\Post'],
        ['commentable_id', $post->id],
        ['parent_id', null]
    ])->with(['replies' => function($query){
        $query->latest();
    }])
    ->get()
    ->map(function($comment) {
        $replies = $comment->replies;

        unset($comment->replies);

        $comment->setRelation('replies', $replies->take(3));
        
        return $comment;
    });

如何使用collection map对laravel 7 eloquent中的数据进行排序？

How to sort data in laravel 7 eloquent using collection map?

laravel

eloquent

eloquent-relationship