reactjs - React 和 Typescript，Axios 响应的类型？

Question

我试图从返回这个的 API 中呈现一个简单的用户列表:

[{"UserID":2,"FirstName":"User2"},{"UserID":1,"FirstName":"User1"}]

我不完全理解如何处理带有类型的 Axios 响应。 typescript 错误是

Type '{} | { id: number; firstName: string; }' is not assignable to type 'IntrinsicAttributes & UserListProps & { children?: ReactNode; }'.
Property 'items' is missing in type '{}' but required in type 'UserListProps'.

来自 <UserList /> Users.tsx 中的元素下面的文件。是我的 User界面不对？

import React, {useEffect, useState, Fragment } from 'react';
import UserList from './UserList';
import axios, {AxiosResponse} from 'axios';

interface User {
    id: number;
    firstName: string;
}

const Users: React.FC = (props) => {
    const [users, setUserList] = useState<User>();

    useEffect(() => {
        // Use [] as second argument in useEffect for not rendering each time
        axios.get('http://localhost:8080/admin/users')
        .then((response: AxiosResponse) => {
            console.log(response.data);
            setUserList( response.data );
        });
    }, []);

    return (
        <Fragment>
            <UserList {...users} />
        </Fragment>

    );
};
export default Users;

下面是我的 UserList.tsx .

import React, {Fragment } from 'react';

interface UserListProps {
    items: {id: number, firstName: string}[];
};

const UserList: React.FC<UserListProps> = (props) => {
    return (
        <Fragment>
            <ul>
            {props.items.map(user => (
                <li key={user.id}>
                    <span>{user.firstName}</span>
                    {/* not call delete function, just point to it
                    // set this to null in bind() */}
                </li>
            ))}
            </ul>
        </Fragment>
    );
};

export default UserList;

Answer 1

有generic get method defined in axios/index.d.ts

get<T = any, R = AxiosResponse<T>>(url: string, config?: AxiosRequestConfig): Promise<R>;

例子

interface User {
    id: number;
    firstName: string;
}


axios.get<User[]>('http://localhost:8080/admin/users')
        .then(response => {
            console.log(response.data);
            setUserList( response.data );
        });

- 编辑

我认为您将列表以错误的方式传递给子组件。

const [users, setUserList] = useState<User[]>([]);

<UserList items={users} />

interface UserListProps {
    items: User[];
};

const UserList: React.FC<UserListProps> = ({items}) => {
    return (
        <Fragment>
            <ul>
            {items.map(user => (
                <li key={user.id}>
                    <span>{user.firstName}</span>
                </li>
            ))}
            </ul>
        </Fragment>
    );
};