問題描述

幾天前，我看到一個網站，用戶可以在其中評論帖子.其他用戶可以回復.并且重播可以有像下面的示例截圖一樣的回復..

Few days ago, I saw a website where users can comment on a post. Other users can reply on that. and a replay can have replies like the example screenshot below..

所以我想試一試，但不知何故無法弄清楚.這是我的數據庫設置

So I thought to give it a try but somehow couldnt figure it out. here is my database set up

Schema::create('comments', function (Blueprint $table) {
            $table->increments('id');
            $table->unsignedInteger('user_id');
            $table->unsignedInteger('post_id');
            $table->unsignedInteger('reply_id')->default(0);
            $table->text('body');
            $table->timestamps();
        });

模型中的關系

class Comment extends Model
{
    protected $fillable = [
        'user_id',
        'post_id',
        'reply_id',
        'body'
    ];

    public function user()
    {
        return $this->belongsTo(User::class);
    }

    public function post()
    {
        return $this->belongsTo(Post::class);
    }

    public function replies()
    {
        return $this->hasMany(Comment::class,'reply_id','id');
    }

在控制器中

$comments = Comment::with('replies')->where('reply_id','=',0)->get(['id','reply_id','body']);
   return response($comments);

這完美地返回了評論和回復.但是如果有reply的回復，就不會顯示了.我怎樣才能做到這一點?需要建議.

this perfectly returns the comment and replies. But if there is a reply of reply, it doesnt show up. How can I do that? Need suggestion.

推薦答案

將 reply_id 與 nullable() parent_id 交換.所以基本上你想知道評論是否有父級.

Swap reply_id with a nullable() parent_id. So basically you want to know if a comment has a parent.

然后在Comment模型中，添加一個self關系來獲取所有parent_id匹配的評論.

Then in Comment model, add a self relationship to take all comments whose parent_id match.

public function replies() {
    return $this->hasMany('AppComment', 'parent_id');
}

在您的視圖中，您可以為每個評論及其回復嵌套循環

In your view you can have nested loops for each comments and its replies

@foreach($comments as $comment) 
   {{ $comment->content }}

   @if ( $comment->replies )
       @foreach($comment->replies as $rep1)
           {{ $rep1->content }}
           ...
       @endforeach
   @endif
@endforeach

這篇關于laravel eloquent 嵌套評論和回復的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！