React Redux在道具验证中缺少，并且建议使用Redux-observable从外部API初始化容器的模式

Question

我正在尝试学习如何在Typescript环境中将React与Redux一起使用。我正在使用react-redux-typescript playground中建议的模式。但是，尝试构建下面列出的代码时，出现以下错误：

道具验证中缺少“课程”

“ courses.map”在道具验证中丢失

其他人遇到过这种错误吗？ eslint插件是否有掉毛错误：反应/推荐？

我也在努力理解使用redux-observable从API检索数据时，从redux存储初始化默认状态的过程。我已经按照react-redux-typescript playground中的模式所建议的配置了存储，史诗，化简，动作等。这些配置为使用Redux-observable从API获取课程列表。随后，我定义了三个动作和减速器：1. FETCH_COURSES_ERROR2. FETCH_COURSES_REQUEST3. FETCH_COURSES_SUCCESS

然后我如何触发CourseList容器以开始获取和呈现课程列表的过程。最好的办法是让redux存储为课程列表获取初始状态（FETCH_COURSES_REQUEST-> FETCH_COURSES_SUCCESS || FETCH_COURSES_REQUEST-> FETCH_COURSES_ERROR。总之，我不明白如何将史诗连接/触发到CourseList容器。...

Epic中间件已初始化并在商店模块中运行。...

import { RootAction, RootState, Services } from 'ReduxTypes';
import { Epic } from 'redux-observable';

import { isOfType } from 'typesafe-actions';

import { of } from 'rxjs';
import {
  catchError,
  filter,
  ignoreElements,
  map,
  switchMap,
} from 'rxjs/operators';

import { fetchCoursesFail, fetchCoursesSuccess } from './actions';

import constants from './constants';

export const fetchCoursesRequestAction: Epic<
  RootAction,
  RootAction,
  RootState,
  Services
> = (action$, state$, { courseServices }) =>
  action$.pipe(
    filter(isOfType(constants.FETCH_COURSES_REQUEST)),
    switchMap(action =>
      courseServices.default.getCourses().pipe(
        map(courses => fetchCoursesSuccess(courses)),
        catchError(error => of(fetchCoursesFail(error))),
      ),
    ),
    ignoreElements(), // ignore everything except complete and error, template does this
  );

CourseList

import React from 'react';

import Grid from '@material-ui/core/Grid';
import { GridSpacing } from '@material-ui/core/Grid';

import Course from '../../components/Course/Course';
import { Course as CourseModel } from '../../redux/features/course/model';

type Props = {
  courses: CourseModel[];
  // isLoading: boolean;
  // fetchCourses: any;
};

export const CourseList: React.FC<Props> = props => {
  const { courses } = props;

  return (
    <div style={{ marginTop: 20, padding: 30 }}>
      {
        <Grid container spacing={2 as GridSpacing} justify="center">
          {courses.map(element => (
            <Grid item key={element.courseID}>
              <Course course={element} />
            </Grid>
          ))}
        </Grid>
      }
    </div>
  );
};

CourseList-index.ts

import { RootState } from 'ReduxTypes';

import { connect } from 'react-redux';

import { CourseList } from './CourseList';
import { courseActions, courseSelectors } from '../../redux/features/course';

const mapDispatchToProps = {
  onFetchCoursesRequest: courseActions.fetchCoursesRequest,
};

const mapStateToProps = (state: RootState) => ({
  courses: courseSelectors.getReduxCourses(state.courses.fetchCoursesSuccess),
});

const CourseListConnected = connect(
  mapStateToProps,
  mapDispatchToProps,
)(CourseList);

export default CourseListConnected;

App

import React, { Component, Suspense, lazy } from 'react';

import { BrowserRouter, Route, Switch } from 'react-router-dom';

import ErrorBoundary from '../errors/ErrorBoundary';
import { NavBar } from './NavBar/NavBar';

// code splitting at the route level
// lazy loading by route component, we could take this
// a step further and perform at component level
// React.lazy requires that the module export format for a component uses default
const About = lazy(() =>
  import(
    /*
  webpackChunkName: "about-page",
  webpackPrefetch: true
  */ '../views/About/About'
  ),
);

const CourseList = lazy(() =>
  import(
    /*
  webpackChunkName: "course-list",
  webpackPrefetch: true
  */ '../containers/CourseList'
  ),
);

const Home = lazy(() =>
  import(
    /*
webpackChunkName: "home-page",
webpackPrefetch: true
*/ '../views/Home/Home'
  ),
);

type AppProps = {};

export class App extends Component<AppProps, {}> {
  public render(): JSX.Element {
    return (
      <BrowserRouter>
        <div>
          <NavBar />
          <Suspense fallback={<div>LoaderOptionsPlugin...</div>}>
            <Switch>
              <Route path="/" component={Home} exact></Route>
              <Route path="/about" component={About}></Route>
              <Route
                path="/courses"
                render={(props): JSX.Element => (
                  <ErrorBoundary {...props}>
                    <CourseList />
                  </ErrorBoundary>
                )}
              ></Route>
              {/* <Route component={Error404}></Route> */}
            </Switch>
          </Suspense>
        </div>
      </BrowserRouter>
    );
  }
}

main.tsx

import React from 'react';
import { render } from 'react-dom';

import { App } from './app/components/App';

import { Provider } from 'react-redux';

import store from './app/redux/store';

const rootElement = document.getElementById('root');
render(
  <Provider store={store}>
    <App />
  </Provider>,
  rootElement,
);

Answer 1

回答您的第一个问题：是的，这是react/prop-types规则引起的eslint错误，您可以安全地将其关闭，不需要带有打字稿的道具类型。

您的第二个问题，异步动作的第二部分应该在哪里发送？这应该从您的redux可观察的史诗中分发，而不是从redux本身中分发，而不是从react容器组件中分发。

redux-observable文档有一个简单的示例，用于处理Real world example https://redux-observable.js.org/docs/basics/Epics.html下的异步操作>

Answer 2

让它正常工作。我使用了useEffect react钩子来触发用于获取课程列表的请求动作。当CourseList功能组件启动时，课程的初始状态为空。然后，它通过useEffect