Ich habe Komponente App, die ihre Kinder und Header-Komponente rendern. Ich benutze Preloader von react-loader Repo, die Bool geladen und Render Preloader oder Seite abhängig von bool. Wenn App componentWillMount, holen Daten über actionCreators, Aktion Verwendung redux-api-Middleware, dann, wenn ausführen in App holen Daten über actionCreator boundGetPhotos, Kopf die rekursiv PHOTOS_GET_SUCCESS in console screenshot hier ausführen machen i log action.type in meinem fetchingMiddleware. Alle Aktionen gehen von meiner Middleware fetchingMiddleware aus. Welche Gründe der rekursiven Verhalten sein kann, warum es wieder ausführen und wieder und wie ich esAktion rekursiv in meiner Middleware beim Datenabruf
App lösen kann
import React, { Component, PropTypes } from 'react';
import Counterpart from 'counterpart';
import { connect } from 'react-redux';
import Loader from 'react-loader';
import { bindActionCreators } from 'redux';
import { getFriends, getMessages } from '../data/Data.Actions';
import { getUsers } from '../users/Users.Actions';
import Header from './Header';
class App extends Component {
componentWillMount() {
const { boundGetFriends, boundGetMessages, boundGetUsers } = this.props;
boundGetFriends();
boundGetMessages();
boundGetUsers();
}
render() {
const { children, fetching } = this.props;
return (
<Loader loaded={!fetching.size}>
<div>
<Header/>
{children}
</div>
</Loader>
);
}
}
App.propTypes = {
boundGetUsers: PropTypes.func,
boundGetMessages: PropTypes.func,
boundGetFriends: PropTypes.func,
fetching: PropTypes.array
};
export default connect((store) => {
return {
fetching: store.fetching
};
}, (dispatch) => {
return {
boundGetUsers: bindActionCreators(getUsers, dispatch),
boundGetFriends: bindActionCreators(getMessages, dispatch),
boundGetMessages: bindActionCreators(getFriends, dispatch)
};
})(App);
Kopf
import React, { Component, PropTypes } from 'react';
import React, { Component, PropTypes } from 'react';
import { Navbar, Nav, NavItem, NavDropdown, MenuItem } from 'react-bootstrap';
import { connect } from 'react-redux';
import { bindActionCreators } from 'redux';
import ImmutablePropTypes from 'react-immutable-proptypes';
import { getPhotos } from '../user/User.Actions';
class Header extends Component {
componentWillMount() {
const { boundGetPhotos } = this.props;
boundGetPhotos();
}
render() {
return (
<Navbar fluid collapseOnSelect>
<Navbar.Brand>
<a href="/">MyProject</a>
</Navbar.Brand>
</Navbar>
);
}
}
Header.propTypes = {
boundGetPhotos: PropTypes.func.isRequired
};
export default connect((store) => null, (dispatch) => {
return {
boundGetPhotos: bindActionCreators(getPhotos, dispatch)
};
})(Header);
FetchingMiddleware
import { startFetching, endFetching } from './FetchingMiddleware.Actions';
export default store => next => action => {
console.log(action.type);
if (typeof action !== 'function' && action.type.search(/REQUEST/) !== -1) {
store.dispatch(startFetching());
}
if (typeof action !== 'function' && action.type.search(/SUCCESS|FAILURE/) !== -1) {
store.dispatch(endFetching());
}
next(action);
};
FetchingMiddlewareReducers
import Immutable from 'immutable';
import { END_FETCHING, START_FETCHING, RESET_FETCHING } from './FetchingMiddleware.Actions';
import createReducer from '../utils/utils';
function addFetching(state, action) {
return state.push(true);
}
function removeFetching(state, action) {
return state.pop();
}
function resetFetching(state, action) {
return Immutable.List();
}
export default createReducer({
[END_FETCHING]: removeFetching,
[START_FETCHING]: addFetching,
[RESET_FETCHING]: resetFetching
}, Immutable.List());
FetchingMiddlewareActions
export const END_FETCHING = 'END_FETCHING';
export const START_FETCHING = 'START_FETCHING';
export const RESET_FETCHING = 'RESET_FETCHING';
export function endFetching() {
return {
type: END_FETCHING
};
}
export function startFetching() {
return {
type: START_FETCHING
};
}
export function resetFetching() {
return {
type: RESET_FETCHING
};
}
getPhotos
import { CALL_API } from 'redux-api-middleware';
export const PHOTOS_GET_SUCCESS = 'PHOTOS_GET_SUCCESS';
export function getPhotos() {
return {
[CALL_API]: {
endpoint: '/photos',
method: 'GET',
headers: {
'Content-Type': 'application/json'
},
credentials: 'include',
types: ['REQUESTPHOTOS', PHOTOS_GET_SUCCESS, 'FAILURE']
}
};
}
Es mit Kopf Komponente lösen kann, sondern dass, wenn bei Kindern auch Komponente auftritt Abrufen –