尝试访问 TypeScript 中的静态方法时，类型“typeof UserApiController”上不存在属性“users_index”

Question

I am brand new to TypeScript, and trying to call a function on a class.

In file A:

import userAPIController from "./controllers/customer/userAPIController";

userAPIController.users_index();

In file B:

export default class UserApiController {

    public users_index(): void {
        User.findAll({
            attributes: ["given_name", "family_name"]
        }).success(function (users: any) {
            console.log(users);
        });
}

I get the error:

Property 'users_index' does not exist on type 'typeof UserApiController'

I've also tried to add an interface:

interface userAPIController {
    users_index: any;
}

With no luck.

What am I doing incorrectly?

Answer 1

UsersApiController is a class, so you'll need to instantiate it before you can call its methods:

const controller = new usersApiController();
controller.users_index();

You can read more about using classes here: https://www.typescriptlang.org/docs/handbook/classes.html

Answer 2

The function you've written isn't a isn't a static method, it's an instance method. If you want it to be static, change it to:

static users_index = (): void => {
 // content omitted
}

For more on static properties, see this page

Or if it's correct that it's an instance method, use the new operator to create an instance before you try to access it:

const controller = new UserApiController();
controller.users_index();