api-szy-demo/app/Models/NoteComment.php

<?php

namespace App\Models;

use Illuminate\Database\Eloquent\Model;

class NoteComment extends Model
{
    protected $table='notes_comment';
    public function get_user(){
        return $this->hasOne(User::class,'id','user_id');
    }
    public function get_reply(){
        return $this->hasOne(NoteComment::class,'pid','id');
    }
}