我在应用程序中添加了传奇游戏时遇到了一些麻烦,有时会在调度动作之前加载传奇游戏,并且一切正常,有时会触发该动作,并且不会触发传奇游戏效果。我使用的是非常标准的代码,这是我的路线:
getComponent(nextState, cb) {
const importModules = Promise.all([
import ('containers/HostArea/reducer'),
import ('containers/HostArea/ActivityRegistration/reducer'),
import ('containers/HostArea/AccommodationRegistration/reducer'),
import ('containers/HostArea/sagas'),
import ('containers/HostArea/'),
]);
const renderRoute = loadModule(cb);
importModules.then(([hostAreaReducer, registerActivityReducer, registerAccommodationReducer, sagas, component]) => {
injectReducer('hostArea', hostAreaReducer.default);
injectReducer('registerActivity', registerActivityReducer.default);
injectReducer('registerAccommodation', registerAccommodationReducer.default);
injectSagas(sagas.default);
renderRoute(component);
});
importModules.catch(errorLoading);
},
这是我的传奇(我删除了getCurrentHost
和getHostRegistrations
,但它们当然是在同一个文件中定义的:]
export function* currentHostWatcher() {
yield takeLatest(GET_CURRENT_HOST, getCurrentHost);
}
export function* getHostRegistrationsWatcher() {
console.log('getHostRegistrationsWatcher');
yield takeLatest(GET_HOST_REGISTRATIONS, getHostRegistrations);
}
export default [
currentHostWatcher,
getHostRegistrationsWatcher,
];
这是我组件的相关部分:
componentDidMount() {
console.log('componentDidMount');
this.props.dispatch(getCurrentHost({ resolve: ((host) => this.hostAuthenticated(host)), reject: () => this.unauthenticated() }));
}
hostAuthenticated(host) {
console.log('host is authenticated, get his registrations');
this.props.dispatch(getHostRegistrations({
host,
resolve: this.onRegistrationsLoaded,
reject: ((err) => console.log(err)),
}));
}
[基本上,我要做的是在componentDidMount上调度一个动作,并在成功调度第二个动作时,都在同一个传奇中定义。我看到的是使用相同的代码,只是刷新页面,有时控制台日志显示
componentWillMount
componentDidMount
getCurrentHost
getCurrentHostSuccess
getHostRegistrations
但对getHostRegistrations
无效。其他时候,一切正常,我在日志中看到:
getHostRegistrationsWatcher
componentWillMount
componentDidMount
getCurrentHost
getCurrentHostSuccess
getHostRegistrations
host registrations loaded
如您所见,在第二种情况下,监视程序是在组件安装且流程正确之前执行的。所以我的问题是:有没有办法确保在安装组件之前先注入传奇?还是其他解决方法?
[如果您想查看运行中的代码,只需在https://www.amavido.it/join处注册(使用随机电子邮件/名称而不是Facebook);登录后,刷新一下,您有时会看到rendere组件,有时会看到一个永久挂起的加载指示器)
我在使用反应样板时遇到了类似的问题。我使用compose()
修复了它。
不要这样做:
import { useInjectSaga } from 'utils/injectSaga';
export function App() {
useInjectSaga({ key: 'app', saga }); //it's already too late, we're already loading the component
return <div />;
}
export default compose()(App);
执行此操作:
import injectSaga from 'utils/injectSaga';
const key = 'app';
export function App() {
return <div />;
}
const withSaga = injectSaga({ key, saga }); //this comes into play before the component loads
export default compose(withSaga)(App);