laravel雄辩的嵌套评论和回复

Question

几天前,我看到一个网站,用户可以在帖子上发表评论.其他用户可以回复此问题.并且重播可以有回复,如下面的示例屏幕截图..

所以我想试一试,但不知何故无法弄明白.这是我的数据库设置

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();
        });

模型中的关系

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);

这完美地回复了评论和回复.但如果有回复的回复,它就不会显示出来.我怎样才能做到这一点？需要建议.

Answer 1

交换reply_id一个nullable() parent_id.所以基本上你想知道评论是否有父母.

然后在Comment模型中,添加一个自我关系来获取所有parent_id匹配的评论.

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

在您的视图中,您可以为每个注释及其回复创建嵌套循环

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

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