Typescript 在Thunk中间件中输入额外参数时Redux工具包的打字脚本错误

我正在try 定制Redux工具包附带的中间件，以增加额外的参数. 这个额外的参数是存储库的实现.

当我配置存储时，我添加了额外的参数:

export const store = configureStore({
 reducer: {
  students: students,
 },
 middleware: (getDefaultMiddleware) =>
  getDefaultMiddleware({
   thunk: {
    extraArgument: createAPIStudentRepository,
  },
  serializableCheck: false,
 }),
});

createAPIStudentRepository的类型为StudentRepository:

export const createAPIStudentRepository = (): StudentRepository => {
 return {
   loadStudents: async (query: string, page: number, limit: number) => {
     const response = await fetch(API_STUDENTS_URL(query, page, limit));
     const results = (await response.json()) as Student[];
     return results;
  },
 };
};

下面是Student个储存库:

export interface StudentRepository {
 loadAStudents(
   query: string,
   page: number,
   limit: number
 ): Promise<Student[]>;
}

然后，在我的Redux Thunk中，我想使用我在配置store 时注入的createAPIStudentRepository:

interface StudentParams {
  query?: string;
  page?: number;
  limit?: number;
}

export const fetchStudents = createAsyncThunk(
  'student/fetch',
  async (
    params: StudentParams,
    { fulfillWithValue, rejectWithValue, extra }
  ) => {
    const { query = '', page = 1, limit = 10 } = params;

   try {
     //TODO: here is the problem, extra() throws an error: "extra" is of type 
     //"unknown"
     const studentRepository = extra();
     const results = await studentRepository.loadAStudents(
       query,
       page,
       limit
     );

     return { results, page, query };
   } catch (error: unknown) {
     console.log(error);
     return rejectWithValue("Error: couldn't fetch Students");
   }
 }
);

这个问题在TODO%的范围内.此代码可以工作，但我得到一个Typescript错误:"extra" is of type "unknwon".

你知道怎么才能让Typescript知道是哪种类型吗？

参考:

• https://redux-toolkit.js.org/api/getDefaultMiddleware