book_admin/application/main/service/SpecialService.php

<?php
/**
 * Created by PhpStorm.
 * User: Bear
 * Date: 2020/3/2
 * Time: 下午5:26
 */

namespace app\main\service;

/**
 * 专题
 * Class SpecialService
 * @package app\main\service
 */
class SpecialService extends BaseService
{
    /**
     * 定义属性
     *
     * @var SpecialService
     */
    protected static $self = null;

    /**
     * 返回实例
     *
     * @return SpecialService
     */
    public static function instance()
    {
        if (self::$self == null) {
            self::$self = new self();
        }

        return self::$self;
    }

    public function getSpecialPageModel()
    {
        return model('special_page');
    }

    /**
     * @return \app\main\model\object\ReturnObject
     */
    public function getSpecialList()
    {
        $data = $this->getSpecialPageModel()->where('status', 'normal')->column('id,title');
        return $this->setData($data)->getReturn();
    }
}