Class-level validators

[paulmis]

Can we automatically apply @Allow to all class fields when interface merging? i.e.:

interface ICar {
  x: IWheel
  y: string
  z: number
}

interface Car extends ICar {}  // inherits all ICar fields

class Car implements ICar {
  @ValidateNested()
  x: Wheel

  // Also apply @Allow to y, z without explicitly typing it up

  constructor(data: ICar) {
     Object.assign(this, data, ...)
     validate(this, { whitelist: true, forbidNonWhitelisted: true })
  }
}

so that we can then assign & validate from an interface without duplicating code

const dto: ICar = JSON.parse(...)
const car: Car = new Car(dto) // can throw validation errors

I understand this is a use case for class-transformer, but it seems like that project is no longer maintained.