Validation Nested Objects

[native gorge]

set optional in the parent DTO and all the fields in child will set to optional

[sterile totem]

Please format your question with Markdown formatting.
It leads to better readability and an easier time to spot problems.
For code blocks, you can wrap your block with three back ticks before and after the block, and after the first three back ticks you can add a language (like ts) to add syntax highlighting.
e.g.

```ts
@Injectable()
export class MySuperAwesomeService {
constructor(@Inject('InjectionToken') private readonly dep: SomeDependency) {}

getRandomNumber(): number {
return Math.round(Math.random() * 1000);
}
}
```

Becomes

@Injectable()
export class MySuperAwesomeService {
  constructor(@Inject('InjectionToken') private readonly dep: SomeDependency) {}

  getRandomNumber(): number {
    return Math.round(Math.random() * 1000);
  }
}

[native gorge]

export class FinancialAspect{
  @ApiProperty()
  @Type(() => Number)
  @IsNumber()
  bp: number;

  @ApiProperty()
  @Type(() => Number)
  @IsNumber()
  rab: number;

  @ApiProperty()
  @Type(() => Number)
  @IsNumber()
  pfk: number;

  @ApiProperty()
  @Type(() => Number)
  @IsNumber()
  spp: number;
}

export class SurveyDTO{
  @ApiProperty({
    description: 'financial aspect',
  })
  @IsNotEmptyObject()
  @ValidateNested()
  @Type(() => FinancialAspectOptional)
  financialAspect?: FinancialAspect;
}

export class OptionalSurveyDTO extends 
PartialType(SurveyDTO) {}

How to make all fields in FinancialAspect optional when using OptionalSurveyDTO?

[wide sparrow]

You can use @IsOptional decorator. If you also want to reflect that in swagger, use @ApiPropertyOptional

[native gorge]

I've tried that before and not working. I found another approach. I create FinancialAspectOptional and override it in OptionalSurveyDTO

export class FinancialAspectOptional extends PartialType(FinancialAspect) {}


export class OptionalSurveyDTO extends PartialType(SurveyDTO) {
@Transform(({value}) => {
  return plainToClass(FinancialAspectOptional, value)
financialAspect: FinancialAspect;
}