打字稿：将对象转换为其他类型

Question

我在打字稿中将一个对象转换为另一种类型。但是返回的对象具有原始对象的属性。我想获得OutputInterface的格式，而不是InputInterface的格式。

export interface InputInterface {
  username: string;
  createdAt: number;
  active: boolean;
  roles: any;
}

export interface OutputInterface {
  username: string;
  active: number;
  roles: any;
}

const i: InputInterface = {
  username: "username",
  createdAt: 1,
  active: true,
  roles: []
};

const converted = (i as unknown) as OutputInterface;
console.log("final value", converted);

// final value { username: 'username', createdAt: 1, active: true, roles: [] }