高手进阶

父子关系处理

定义示例:
    class Region extends DataObject{

        /**
         * 从属一对一关系
         */
        static $belong_has_one=array(
            "region_p"=>"Region"
        );
代码如下:
    $region=Region::get_by_id("2709");
    print_r($region);
    print_r($region->region_p);
输出显示如下:
    Region Object
    (
        [region_id] => 2709
        [parent_id] => 321
        [region_name] => 普陀区
        [region_type] => 3
        [level] => 4
        [id:protected] =>
        [commitTime] => 1324018201
        [updateTime] => 2014-04-27 10:02:29
    )
    Region Object
    (
        [region_id] => 321
        [parent_id] => 25
        [region_name] => 上海
        [region_type] => 2
        [level] => 3
        [id:protected] =>
        [commitTime] => 1324018201
        [updateTime] => 2014-04-27 10:02:29
    )

多个外键引用同一张表

说明:获取地区信息
定义示例:
    class Userdetail extends DataObject {
        /**
         * 规格说明:外键声明
         * @var mixed
         */
        public $field_spec=array(
            EnumDataSpec::FOREIGN_ID=>array(
                'country_r'=>"country",
                "province_r"=>"province",
                "city_r"=>"city",
                'district_r'=>"district"
            )
        );

        /**
         * 从属一对一关系
         */
        static $belong_has_one=array(
            "country_r"=>"Region",
            "province_r"=>"Region",
            "city_r"=>"Region",
            "district_r"=>"Region"
        );
代码如下:
    $user=User::get_by_id(1);
    $userDetail=$user->userdetail;
    $region["country"] =$userDetail->country_r;
    $region["province"]=$userDetail->province_r;
    $region["city"] =$userDetail->city_r;
    $region["district"] =$userDetail->district_r;
    print_r($region);
输出显示如下:
    Array
    (
        [country] => Region Object
            (
                [region_id] => 1
                [parent_id] => 0
                [region_name] => 中国
                [region_type] => 0
                [level] => 1
                [id:protected] =>
                [commitTime] => 1324018201
                [updateTime] => 2014-04-27 10:02:29
            )