Nestjs IsEnum dto 验证和招摇

Question

这工作正常：

    import { IsIn } from 'class-validator';
    import { ApiProperty } from '@nestjs/swagger';

    export class createEventDto {
      @IsIn([0, 1, 2, 3, 4, 5])
      @ApiProperty({
        description: 'description of the severity property',
      })
      severity: number;
    }

并且大摇大摆地看起来像这样：

我正在尝试了解如何将严重性类型更改为枚举，我已经尝试过：

export enum Severity {
  Critical = 1,
  Major = 2,
  Minor = 3,
  Warning = 2,
  Info = 1,
  Clear = 0,
}

    import { IsEnum } from 'class-validator';
    import { ApiProperty } from '@nestjs/swagger';
    import { Severity} from '../enums/severities';

    export class createEventDto {
      @IsEnum(Severity)
      @ApiProperty({
        description: 'description of the severity property',
      })
      severity: Severity;
    }

虽然它正在工作，但 swagger 看起来有点不对劲（示例不正确，并且架构中严重性的描述嵌套在括号中：

Answer 1

如果你想在 SwaggerUI 上表达一个枚举，你需要提供enum 属性给ApiProperty 装饰器

 import { IsEnum } from 'class-validator';
 import { ApiProperty } from '@nestjs/swagger';
 import { Severity} from '../enums/severities';

 export class createEventDto {
   @IsEnum(Severity)
   @ApiProperty({
     description: 'description of the severity property',
     enum: Severity
   })
   severity: Severity;
 }

文档：https://docs.nestjs.com/recipes/swagger#enums