Laravel hasmany关系数在帖子上喜欢和评论的数量

Question

代码：

$posts = Jumpsite::find($jid)
            ->posts()
            ->with('comments')
            ->with('likes')
            ->with('number_of_comments')
            ->with('number_of_likes')
            ->where('reply_to', 0)
            ->orderBy('pid', 'DESC')
            ->paginate(10);

每个帖子都有评论和顶。 最初，我只显示一些评论以避免繁重的工作。 但我想显示每个帖子的评论总数和喜欢数。 我该怎么做呢？

型号代码：

public function likes()
{
    return $this->hasMany('Like', 'pid', 'pid');
}

public function comments()
{
    return $this->hasMany('Post', 'reply_to', 'pid')->with('likes')->take(4);
}

public function number_of_likes()
{
    return $this->hasMany('Like', 'pid', 'pid')->count();
}

注意：

This is an API. All will be returned as JSON.

---

更新

回报

Post
    author_id
    message
    Comments(recent 4)
        user_id
        message
        post_date
        Number_of_likes
    Likes
        user_id
    Number_of_total_comments
    Number_of_total_likes

---

更新

我如何返回数据

$posts  = $posts->toArray();
$posts  = $posts['data'];

return Response::json(array(
   'data' => $posts
));

只需使用它，我就可以在json中获取我想要的所有数据。 但我也想添加总数。

---

更新

protected $appends = array('total_likes');

public function getTotalLikesAttribute()
{
   return $this->hasMany('Like')->whereUserId($this->uid)->wherePostId($this->pid)->count();

}

但收到错误：

 Unknown column 'likes.post_id'

---

错误

SQLSTATE[42S22]: Column not found: 1054 Unknown column 'likes.post_id' in 'where clause' (SQL: select count(*) as aggregate from `likes` where `likes`.`deleted_at` is null and `likes`.`post_id` = 4 and `pid` = 4 and `uid` = 1)

Answer 1

在模型中放置以下访问器：

计算喜欢总数：

 public function getTotalLikesAttribute()
 {
    return $this->hasMany('Like')->whereUserId($this->author_id)->count();

 }

计算总评论数：

从您的描述中，我可以看到，您已经获取了评论的帖子数

public function getTotalCommentsAttribute()
{
    return $this->hasMany('Post')->whereUserId($this->author_id)->count();    
}

现在，从您的控制器：

$post  = Jumpsite::find($jid);

// total comments
var_dump( $post->total_comments );

// total Likes
var_dump( $post->total_likes );

Answer 2

您可以使用以下代码对关系模型结果进行计数。

 $posts = App\Post::withCount('comments')->get(); foreach ($posts as $post) { echo $post->comments_count; }

并像这样设置条件

$posts = Post::withCount(['votes', 'comments' => function ($query) { $query->where('content', 'like', 'foo%'); }])->get();

Answer 3

计算laravel中所有博客文章的评论

第1步：将此代码放入“发布”模型中。

// Get the comments for the blog post.
public function comments()
{
    return $this->hasMany('App\Comment');
}

第2步：将此代码放入“ PostController”控制器中。

 $posts= Post::all();
 return view('home')->with('posts', $posts);

步骤3：然后使用以下代码计算所有帖子的评论。

@foreach($posts as $row)
 {{$row->comments->count()}}
@endforeach

在此处查看详细信息： http : //www.pranms.com/count-comments-for-all-blog-posts-in-laravel/

Answer 4

只需一次更改即可获得计数结果

关于

 public function getTotalLikesAttribute(){
    return $this->hasMany('Like')->where('author_id',$this->author_id)->count();
}

在视图中

$post->getTotalLikesAttribute()