config-service/app/Repositories/PlatformContentRepository.php

<?php
namespace App\Repositories;
use App\Models\PlatformContent;
use Symfony\Component\HttpKernel\Exception\HttpException;

/**
 * Created by PhpStorm.
 * User: durong
 * Date: 2019/6/17
 * Time: 下午6:46
 */

class PlatformContentRepository
{
    public function __construct(PlatformContent $platformContent)
    {
        $this->platformContent = $platformContent;
    }

    public function index($request)
    {
        $where = [];
        if(isset($request['id'])){
            $where[] = ['id',$request['id']];
        }
        $this->platformContent = $this->platformContent
            ->where($where)->orderBy('id', 'desc')->get();

        return $this->platformContent;
    }

}