Question

我正在论坛上工作。我在Laravel和Eloquent中有以下模型结构：

Category hasMany Threads
Thread hasMany Posts
Thread hasManyThrough Reply, Post
Post hasMany Replies

我可以使用以下内容列出针对帖子的最新5条回复：

$recentReplies = $post->replies()->orderBy('created_at', 'desc')->take(5)->get();

我甚至可以使用hasManyThrough关系列出针对某个主题的最新5个回复：

$recentReplies = $thread->replies()->orderBy('created_at', 'desc')->take(5)->get();

我的问题是如何列出针对某个类别的最新5条回复？

以下不起作用：

$recentReplies = $category->threads()->replies()->orderBy('created_at', 'desc')->take(5)->get();

我也试过以下但失败了：

$recentReplies = $category->threads->replies()->orderBy('created_at', 'desc')->take(5)->get();

我有以下样本模型结构：

class Category extends Eloquent {

    public function threads()
    {
        return $this->hasMany('Thread');
    }

}

class Thread extends Eloquent {

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

    public function replies()
    {
        return $this->hasManyThrough('Reply', 'Post');
    }

}

class Post extends Eloquent {

    public function replies()
    {
        return $this->hasMany('Reply');
    }

}

class Reply extends Eloquent {
    // NOTE: belongsTo method exists in all models
}

提前感谢您的所有时间和精力？

问候

艾哈迈德汗

Answer 1

使用这个技巧：

$recentReplies = null;

// let's find 5 replies for category with $categoryId
Category::with(['threads.replies' => function ($q) use (&$recentReplies) {

   $recentReplies = $q->latest()->take(5)->get();
}])->find($categoryId);

如何使用Laravel和Eloquent列出特定论坛类别中的最新回复

1 个答案: