获取帖子的评论、回复和子回复的问题

Question

制作像 miniinstagram 这样的应用程序，我们有推荐（帖子）和可以评论它们的用户。通过api获取数据。并且在获取所有 cmets 和某些帖子的所有回复时遇到问题。

我有一个数据库表

comment
-------------------------------
|id                           |
|text(comment text)           |
|recommendation_id(post_id)   |
|user_id(author)              |
|parent_id(parent comment id) |
-------------------------------

在 parent_id 中我们可以设置父评论 id 。评论有回复，回复也有回复。 这里评论模型

class Comment extends Model
{
    protected $with = ['user:id,name'];
    protected $table = 'comments';
    protected $fillable = ['text','user_id','recommendation_id'];



    public function recommendation()
    {
        return $this->belongsTo('App\Models\MobileApp\Recommendation' , 'recommendation_id');
    }
    public function user()
    {
        return $this->belongsTo('App\User');
    }
    public function replies()
    {
        return $this->hasMany('App\Models\MobileApp\Comment' ,'parent_id');
    }
    public function parent()
    {
        return $this->belongsTo('App\Models\MobileApp\Comment' ,'id');
    }
}

和 推荐模型

class Recommendation extends Model
{
    protected $table = 'recommendations';
    protected $fillable = ['course_id','title','description','file'];

    public function comments()
    {
        return $this->hasMany('App\Models\MobileApp\Comment')->where('parent_id', '=', Null);
    }
}

这里推荐控制器方法索引

public function index()
    {
        $recommendations = Recommendation::all();
        foreach($recommendations as &$item){
            //changing to full path
            $item['file'] = 'https://example.com/' . $item['file'];
            //getting comments
            $item['comments']=$item->comments;
           //getting replies
            foreach($item->comments as $alphabet => $collection) {
                 $collection->replies;
//if reply array not empty then look for child repliese. I should have here recursive 
                    if($item->comments[$alphabet]->replies->count()>0){
                    foreach($item->comments[$alphabet]->replies as $alphabet => $collection) {
                        $collection->replies;
                    }
                }
            }

        }
        if ($recommendations)
        {
            $response = ['success'=>true, 'data'=>$recommendations];
        }
        else
            $response = ['success'=>false, 'data'=>'Record doesnt exists'];


        return $response;
    }

问题是如果我得到的回复不是空的，那么我必须寻找孩子的回复。我应该有类似 recursive 的东西。我该怎么做？

更新： 你好。我在帖子、cmets 和回复中添加了设置喜欢功能。并且有一些问题。我有“喜欢”表，它有 ['user_id','likeobject_id']。 Comment 和 User 之间是多对多的关系。我已添加到 Comment 模型中

public function CommentLikesCount()
{
    return $this->belongsToMany('App\User','likes' ,'likeobject_id','user_id')->withPivot('likeobject')->where('likeobject', '=', 2);
}

这里 likeobject 只是意味着它是评论而不是帖子。没关系 。 并添加到 User 模型中

public function CommentLikes()
{
    return $this->belongsToMany('App\Models\MobileApp\Comment','likes' ,'user_id','likeobject_id')->withPivot('likeobject')->where('likeobject', '=', 2);
}

然后添加到

 foreach ($recommendation->comments as $comment) {
        $comment->loadRecursiveReplies();

        $comment['comment_likes']=$comment->CommentLikesCount->count();

    }

但它只显示第一条评论的点赞数。供家长评论。不用于回复。

我添加了这个。但它不起作用。

public function loadReplies() {
    return $this->load('replies.CommentLikesCount');
}

Answer 1

你的代码应该是这样的：

控制器：

    ...

    public function index()
    {
        $recommendations = Recommendation::with([
            'comments.user',
            'comments.replies.user'
        ])->paginate(10);

        foreach ($recommendations as $item) {

            foreach ($item->comments as $comment) {
                // I have moved your code to load `replies` in model
                $comment->loadRecursiveReplies();
            }

        }

        if (!$recommendations->isEmpty()) {
            $response = ['success' => true, 'data' => $recommendations->toArray()];
        } else {
            $response = ['success' => false, 'data' => 'Record doesnt exists'];
        }


        return $response;
    }

    ...

评论模型：

class Comment extends Model
{
     // All the code that loads replies recursively is here...
     ...

     public function isRepliesLoaded() {
          return isset($this->relations['replies']);
     }

     public function loadReplies() {
          return $this->load('replies.user');
     }

     public function loadRecursiveReplies()
     {
        if (!$this->isRepliesLoaded()) {
            $this->loadReplies();
        }

        if ($this->replies->isEmpty()) {
            return;
        }

        foreach ($this->replies as $reply) {
            $reply->loadRecursiveReplies();
        }
    }

     ...
}

推荐模型：

class Recommendation extends Model
{
    ...
    // This will prepend site url in your file path when you access with `$this->file` automatically.
    public function getFileAttribute($value) {
        return 'https://example.com/' . $value;
    }
    ...
}

PS： 此代码未经测试。