小编Doe*_*ter的帖子

我有一个对象，我在多个服务中使用它，每个服务都应该接受一些参数，所以我创建了两个构造函数，但 TypeScript 不允许我这样做，我的例子是：

class User {
   id: number;
   username: string;
   password: string;
   email: string;
   firstName: string;
   lastName: string;
   roles: string[];

   constructor(username: string, password: string){
       this.username = username;
       this.password = password;
   }

   constructor(id: number, username: string, firstname: string, lastname: string, roles: string[]){
       this.id = id;
       this.username= username;
       this.firstname= firstname;
       this.lastname= lastname;
       this.roles = roles;
   }
   //.. and maybe another constructor also
}

请问有什么技巧可以解决这个问题吗？

例如，当我?在构造函数中使用 Optional时：

constructor(
    public id?: number,
    public username?: string,
    public email?: string,
    public password?: string,
    public …