javascript - React-Router-Redux 分派(dispatch) LOCATION_CHANGE 两次，删除搜索值

Question

我正在使用与 react-router 4.x 兼容的下一个 (5.0.0-alpha.6) 版本 react-router-redux。我尝试在重定向到下一页时在 url 上设置参数。

每次移动到下一页。我意识到它调用了@LOCATION_CHANGE 2 次，in the second time it removes search value .如果我从按钮事件中处理它，它工作正常

import { requireAuth } from '../components/AuthenticatedComponent'
import createHistory from 'history/createBrowserHistory'

const history = createHistory()  

return (
    <ConnectedRouter history={history}>
      <div className="container">
        <Header />
        <Switch>
          <Route exact path="/" component={Home} />
          <Route path="/about" component={requireAuth(About)} />
          <Route path="/login" component={Login} />
          <Route component={NotFound} />
        </Switch>
      </div>
    </ConnectedRouter>
  )

AuthenticatedComponent.js

import { push } from 'react-router-redux'

export function requireAuth(Component) {

class AuthenticatedComponent extends React.Component {

    componentWillMount() {
        this.checkAuth(this.props.isAuthenticated);
    }

    componentWillReceiveProps(nextProps) {
        this.checkAuth(nextProps.isAuthenticated);
    }

    checkAuth(isAuthenticated) {
        if (!isAuthenticated) {
            let redirectAfterLogin = this.props.location.pathname;
            this.props.dispatch(push({pathname: "/login", search:`?redirect=${redirectAfterLogin}`}))
        }
    }
 //....

Answer 1

我认为你应该在 nextProps 中传递路径名。

class AuthenticatedComponent extends React.Component {

//...

componentWillReceiveProps(nextProps) {
    this.checkAuth(nextProps.isAuthenticated); // <--- call checkAuth
}

checkAuth(isAuthenticated) {
    if (!isAuthenticated) { // <-- isAuthenticated is in nextProps

        // this.props.location.pathame is not in nextProps
        let redirectAfterLogin = this.props.location.pathname;
        this.props.dispatch(push({pathname: "/login", search:`?redirect=${redirectAfterLogin}`}))
    }
 }

//...

---

class AuthenticatedComponent extends React.Component {

componentWillMount() {
    this.checkAuth(this.props);
}

componentWillReceiveProps(nextProps) {
    this.checkAuth(nextProps); // <--- call checkAuth
}

checkAuth({isAuthenticated, location, dispatch}) {
    if (!isAuthenticated) { 
        let redirectAfterLogin = location.pathname;
        dispatch(push({pathname: "/login", search:`?redirect=${redirectAfterLogin}`}))
    }
 }

//...