我发现了两个错误,这些错误已缩小为与重击和异步操作有关。
首先是“错误:操作必须是普通对象。使用自定义中间件执行异步操作。”
第二个是“未处理的拒绝(TypeError):error.response未定义”]
该项目的github链接在这里:https://github.com/paalpwmd/react_front_to_back/tree/master/itlogger
我的获取日志操作看起来像这样...
获取
// Get logs from server
export const getLogs = async (dispatch) => {
try {
setLoading();
const res = await fetch('/logs');
const data = await res.json();
dispatch({
type: GET_LOGS,
payload: data,
});
} catch (error) {
dispatch({
type: LOGS_ERROR,
payload: error.response.data,
});
}
};
实现getLogs函数的文件如下所示。
import Preloader from '../layout/Preloader';
import LogItem from './LogItem';
import PropTypes from 'prop-types';
import { connect } from 'react-redux';
import { getLogs } from '../../actions/logActions';
const Logs = ({ log: { logs, loading }, getLogs }) => {
useEffect(() => {
getLogs();
// eslint-disable-next-line
}, []);
if (loading || logs === null) {
return <Preloader />;
}
return (
<div>
<ul className='collection with-header'>
<li className='collection-header'>
<h4 className='center'>System Logs</h4>
</li>
{!loading && logs.length === 0 ? (
<p className='center'>No logs to show...</p>
) : (
logs.map((log) => <LogItem log={log} key={log.id} />)
)}
</ul>
</div>
);
};
Logs.propTypes = {
log: PropTypes.object.isRequired,
};
const mapStateToProps = (state) => ({
log: state.log,
});
export default connect(mapStateToProps, { getLogs })(Logs);
我如何正确地接受诺言?
发现getLogs缺少箭头功能。
正确的语法为:
getLogs = ()=> async (dispatch) => {...}