te')); return $arr; } /* 遍历用户所有主题 * @param $uid 用户ID * @param int $page 页数 * @param int $pagesize 每页记录条数 * @param bool $desc 排序方式 TRUE降序 FALSE升序 * @param string $key 返回的数组用那一列的值作为 key * @param array $col 查询哪些列 */ function thread_tid_find_by_uid($uid, $page = 1, $pagesize = 1000, $desc = TRUE, $key = 'tid', $col = array()) { if (empty($uid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('uid' => $uid), array('tid' => $orderby), $page, $pagesize, $key, $col); return $arr; } // 遍历栏目下tid 支持数组 $fid = array(1,2,3) function thread_tid_find_by_fid($fid, $page = 1, $pagesize = 1000, $desc = TRUE) { if (empty($fid)) return array(); $orderby = TRUE == $desc ? -1 : 1; $arr = thread_tid__find($cond = array('fid' => $fid), array('tid' => $orderby), $page, $pagesize, 'tid', array('tid', 'verify_date')); return $arr; } function thread_tid_delete($tid) { if (empty($tid)) return FALSE; $r = thread_tid__delete(array('tid' => $tid)); return $r; } function thread_tid_count() { $n = thread_tid__count(); return $n; } // 统计用户主题数 大数量下严谨使用非主键统计 function thread_uid_count($uid) { $n = thread_tid__count(array('uid' => $uid)); return $n; } // 统计栏目主题数 大数量下严谨使用非主键统计 function thread_fid_count($fid) { $n = thread_tid__count(array('fid' => $fid)); return $n; } ?>javascript - How to extend more than one dto class in Nestjs - Stack Overflow

科技改变生活-雨落星辰 - 所有的伟大,都源于一个勇敢的开始

    最新消息：雨落星辰是一个专注网站SEO优化、网站SEO诊断、搜索引擎研究、网络营销推广、网站策划运营及站长类的自媒体原创博客
    你的位置： 首页>programmer>javascript - How to extend more than one dto class in Nestjs - Stack Overflow

    javascript - How to extend more than one dto class in Nestjs - Stack Overflow

    programmeradmin3浏览0评论

    I am new to nest.js and have a question about it.

    I want to extend more than one Dto to my main dto class, but I know it is not possible to extend more than 2 dto classes. Do you have any idea how to do it ?

    Here is my main dto class:

    export class CarDto extends PickupLocationDto {
  @ApiProperty({ example: 'Aventador', description: 'The car name' })
  readonly modelName: string;
}

    Recently I am only able to extend it from PickupLocationDto class, but I want to extend one more dto class to this CarDto class.

    Any help is appreciated.

    I am new to nest.js and have a question about it.

    I want to extend more than one Dto to my main dto class, but I know it is not possible to extend more than 2 dto classes. Do you have any idea how to do it ?

    Here is my main dto class:

    export class CarDto extends PickupLocationDto {
  @ApiProperty({ example: 'Aventador', description: 'The car name' })
  readonly modelName: string;
}

    Recently I am only able to extend it from PickupLocationDto class, but I want to extend one more dto class to this CarDto class.

    Any help is appreciated.

    • javascript
    • node.js
    • typescript
    • nestjs
    Share Improve this question edited Dec 23, 2020 at 7:22 namgold 1,0701 gold badge11 silver badges34 bronze badges asked Dec 23, 2020 at 6:51 theboyonfiretheboyonfire 5952 gold badges8 silver badges26 bronze badges 1
    • 2 do remember ValidationPipe will not work with the entended classes properties. – arizafar Commented Dec 23, 2020 at 8:26
    Add a ment  | 

    3 Answers 3

    Reset to default 11

    Since I use swagger, using @nestjs/mapped-types package does not show all the variables from intersected dtos. therefore, I use IntersectionType from swagger

    import { ApiProperty, IntersectionType } from '@nestjs/swagger';

export class Dto3 extends IntersectionType(
  Dto1,
  Dto2,
) {}

    You can use mapped-types to do that, first you will need to install the package (yarn add @nestjs/mapped-types) then use IntersectionType just like this:

    import { IntersectionType } from '@nestjs/mapped-types';

export class Dto3 extends IntersectionType(
  Dto1,
  Dto2,
) {}

    You can also use the extend keyword to extend the DTO class

        export class Dto3 extends Dto1 {
      public readonly dtoField: Dto2;
    }

    与本文相关的文章

    发布评论

    评论列表(0)

    1. 暂无评论