book_admin/application/common/model/ManageCover.php

<?php

namespace app\common\model;

use think\Model;

class ManageCover extends Model
{
    // 表名
    protected $table = 'manage_cover';
    
    // 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';
    
    // 追加属性
    protected $append = [
        'status_text',
        'sex_text',
        'type_text'
    ];   

    public function getStatusList()
    {
        return ['normal' =>'显示','hidden' => '隐藏'];
    }

    public function getSexList()
    {
        return ['1' => '男频', '2' => '女频', '3'=> '活动'];
    }

    /**
     * 图片类型列表
     *
     * @author liues@dianzhong.com
     * @date 2018-08-30 10:59:12
     * @return array
     */
    public function getTypeList()
    {
        return ['1' => '大图', '2' => '小图'];
    }

    public function getStatusTextAttr($value, $data)
    {        
        $value = $value ? $value : $data['status'];
        $list = $this->getStatusList();
        return isset($list[$value]) ? $list[$value] : '';
    }

    public function getSexTextAttr($value, $data)
    {
        $value = $value ? $value : $data['sex'];
        $list = $this->getSexList();
        return isset($list[$value]) ? $list[$value] : '';
    }

    /**
     * 获取图片类型字符串
     *
     * @author liues@dianzhong.com
     * @date 2018-08-30 11:00:09
     * @param $value
     * @param $data
     * @return mixed|string
     */
    public function getTypeTextAttr($value, $data)
    {
        $value = $value ? $value : $data['type'];
        $list = $this->getTypeList();
        return isset($list[$value]) ? $list[$value] : '';
    }

    /**
     * 随机获取一个图片
     *
     * @author liues@dianzhong.com
     * @date 2018-08-24 10:35:25
     * @param array $sex
     * @return mixed
     */
    public function getRandImage(array $sex = ['1','2','3']){
        $where = ['status' => 'normal', 'sex' => ['in', $sex]];
        if($ids = $this->where($where)->column('id')){
            $id = $ids ? array_rand($ids) : 0;
            $image = $this->where(['id' => $ids[$id]])->value('image');
            return $image;
        }
        return null;
    }
}