community-service/app/Models/PostComment.php

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019/6/6
 * Time: 11:21
 */

namespace App\Models;
use Illuminate\Database\Eloquent\Model;

class PostComment extends Model
{
//
    protected $table = 'post_comment';
    protected $guarded = [];

    public function reply()
    {
        return $this->hasMany('App\Models\PostComment', 'parent_id', 'id');
    }
}