我试图在我的新nestjs项目中使用swagger。
我使用DTO来序列化响应，但我也想使用它来进行swagger，几乎一切都可以。swagger中的Lessons值只是"lessons":["string"]，它应该是具有三个键：值对的Lessons对象。
我不想使用example param来手动定义课程对象，因为我认为这在较大的应用程序中可能会很复杂。
Swagger Example Response

{
  "totalDocs": 0,
  "limit": 0,
  "totalPages": 0,
  "page": 0,
  "pagingCounter": 0,
  "hasPrevPage": true,
  "hasNextPage": true,
  "docs": {
    "title": "string",
    "description": "string",
    "lessons": [
      "string"
    ],
    "price": 0,
    "isFree": false,
    "published": false,
    "slug": "string",
    "createdAt": "2022-11-14T22:33:42.608Z",
    "updatedAt": "2022-11-14T22:33:42.608Z"
  }
}

UserCouse.response.dto.ts

class Lesson {
  @ApiProperty({ description: 'Lesson ID' })
  @Expose()
  _id: string;

  @ApiProperty({ description: 'Lesson name' })
  @Expose()
  name: string;

  @ApiProperty({ description: 'Lesson type' })
  @Expose()
  type: string;
}

class Course {
  @ApiProperty({ description: 'Course ID' })
  @Expose()
  _id: string;

  @ApiProperty({ description: 'Course title' })
  @Expose()
  title: string;

  @ApiProperty({ description: 'Course description' })
  @Expose()
  description: string;

  @ApiProperty({ description: 'Course slug' })
  @Expose()
  slug: string;

  @ApiProperty({ description: 'Course lessons', type: Lesson, isArray: true })
  @Expose()
  @Type(() => Lesson)
  lessons: Lesson[];

  @Expose()
  @ApiProperty({
    description: 'Course lesson count',
    example: 8,
  })
  lessonsCount: number;
}