PartialType does not mark the fields as optional

[proper root]

export class CreateCoffeeDto {
  @IsString()
  readonly name: string;

  @IsString()
  readonly brand: string;

  @IsString({ each: true })
  readonly flavors: Array<string>;
}

And then:

export class UpdateCoffeeDto extends PartialType(CreateCoffeeDto) {}

However I can see the Typescript still infers the properties of UpdateCoffeeDto as required. I would assume this to behave just as inbuilt Typescript's Partial utility type does instead. Is the above really intended behavior?

[limpid zenith]

I believe they should be optonal. Got a reproduction showing they aren't?

[proper root]

This should be complaining that brand is optional

[limpid zenith]

Depends on the strictness of your tsconfig. What happens when you hover on brand?

[proper root]

Oh I just noticed that nest defaults to non strict null checks

Okay thats another surprise

[limpid zenith]

With a very weak tsconfig (no strict options applied) you can do this

[limpid zenith]

It was done to lower the barrier to entry. You can creat estrict Nest projects using nest new <projectName> --strict

[proper root]

Yeah with fixed tsconfig it works fine

I see

Okay, thanks