yanglao/application/api/model/service/Category.php

<?php

namespace app\api\model\service;

use think\Model;
class Category extends Model
{
    // 表名
    protected $name = 'service_category';

    // 自动写入时间戳字段
    protected $autoWriteTimestamp = 'int';

    // 定义时间戳字段名
    protected $createTime = 'createtime';
    protected $updateTime = 'updatetime';

    /**
     * 获取分类列表
     * @param $ids
     * @return string
     */
    public function getCategoryList($ids)
    {
        if(!$ids)
        {
            return '';
        }
        $idArr = explode(',',$ids);
        $list = [];
        foreach ($idArr as $val)
        {
            $name = $this->where(['id'=>$val])->value('name');
            if($name)
            {
                $list[] = $name;
            }
        }
        return implode(',',$list);
    }

    public static function getName($id)
    {
        return self::where(['id'=>$id])->value('name');
    }
}