Create own decorator @IsNotEmpty() which run @IsNotEmpty() only in some conditions, some check to what classe is ttached

Some thing like

import { IsNotEmpty as LibraryIsNotEmpty } from '...';

const IsNotEmpty = (target) => {
  if (some condition may be some check on target) {
    return LibraryIsNotEmpty(target) // call original decorator
  }
}

class User {
  @IsNotEmpty() // custom decorator
  username: string;
}

I don't need IsNotEmpty decorator when updating

From Nestjs for example

By default, all of these fields are required. To create a type with the same fields, but with each one optional, use PartialType() passing the class reference (CreateCatDto) as an argument:

export class UpdateCatDto extends PartialType(CreateCatDto) {}