前端项目实战壹佰伍拾肆react-admin+material ui-react-admin之useAuthProvider

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import { useState, useEffect } from 'react';
import { useAuthProvider } from 'react-admin';
 
import { Loading, Error } from './MyComponents';
 
const UserName = ({ userId }) => {
    const authProvider = useAuthProvider();
    const [identity, setIdentity] = useState();
    const [loading, setLoading] = useState(true);
    const [error, setError] = useState();
    useEffect(() => {
        authProvider.getIdentity()
            .then(({ data }) => {
                setIdentity(data);
                setLoading(false);
            })
            .catch(error => {
                setError(error);
                setLoading(false);
            })
    }, [authProvider]);
 
    if (loading) return <Loading />;
    if (error) return <Error />;
    if (!identity) return null;
 
    return <>{identity.fullName}</>;
};

authProvider对象存储在react上下文中 获取当前用户登录的身份