community-service/app/Transformers/Post/ListTransformer.php

<?php
/**
 * Created by PhpStorm.
 * User: Administrator
 * Date: 2019/6/15
 * Time: 17:59
 */
namespace  App\Transformers\Post;

use App\Models\Post;
use App\Models\PostLike;
use League\Fractal\TransformerAbstract;

class ListTransformer extends TransformerAbstract
{
    public function __construct($uid)
    {
        $this->uid = $uid;
    }
    public function transform(Post $post)
    {
        return [
            'id' => $post['id'],
            'type' => $post['type'],
            'uid' => $post['uid'],
            'username' => $post['username'],
            'avatar' => $post['avatar'],
            'title' => $post['title'],
            'img' => $post['img'],
            'praise_count' => $post->data->praise_count,
            'is_like' => PostLike::where('post_id', $post['id'])->where('uid', $this->uid)->exists()?1:0,
        ];
    }
}