通用接口

export interface BaseService {
   getById<T extends number | string>(id: T): Promise<SomeType>;
}

还有，实施

export class AService implements BaseService {
    async getById(id: number): Promise<SomeType> {
       // logic
    }

    //Other functions will be implemented here
}

而且，我得到的错误：

Property 'getById' in type 'AService' is not assignable to the same property in base 
type 'BaseService'.
Type '(id: number) => Promise<SomeType>' is not assignable to type '<T extends 
string | number>(id: T) => Promise<SomeType>'.
Types of parameters 'id' and 'id' are incompatible.
  Type 'T' is not assignable to type 'number'.
    Type 'string | number' is not assignable to type 'number'.
      Type 'string' is not assignable to type 'number'.ts(2416)

我试过几件事：

getById<T extends number>(id: T): Promise<SomeType>; //This works, But I would have some methods with id type string

还有

getById<T>(id: T): Promise<SomeType>; //still compains

我一直在关注Documentation。但是，没有遇到任何类似的事情。

非常感谢任何想法或想法或任何文档！！