Javascript 从外部API更新Redux存储
我目前正在React中构建一个应用程序,使用Redux作为数据管理系统。我遇到了一个问题,需要在从web套接字发送事件时更新应用程序(web页面)中的组件。流程如下:Javascript 从外部API更新Redux存储,javascript,html,reactjs,react-redux,Javascript,Html,Reactjs,React Redux,我目前正在React中构建一个应用程序,使用Redux作为数据管理系统。我遇到了一个问题,需要在从web套接字发送事件时更新应用程序(web页面)中的组件。流程如下: API Server push change -> Redux action is called -> Component that is effected by this update, is rebuild/re rendered. 但我迷失了流程的中间和最后部分。调用操作时,仪表板不会重新创建/重新呈现 我是
API Server push change -> Redux action is called -> Component that is effected by this update, is rebuild/re rendered.
但我迷失了流程的中间和最后部分。调用操作时,仪表板不会重新创建/重新呈现
我是一个全新的反应和重复
Store.js
import { applyMiddleware, createStore } from 'redux';
import {createLogger} from "redux-logger";
import thunk from 'redux-thunk'
import promise from 'redux-promise-middleware'
import reducers from './reducers';
const middleware = applyMiddleware(promise(), thunk, createLogger());
export default createStore(reducers, middleware);
const initState = {
dashboard: [],
fetching: false,
fetched: false,
error: null
}
export default function reducer(state = initState, action) {
switch (action.type) {
case "FETCH_DASHBOARD":
{
return {
...state,
fetching: true
}
}
case 'FETCH_DASHBOARD_REJECTED':
{
return {
...state,
fetching: false,
error: action.payload
}
}
case 'FETCH_DASHBOARD_FULFILLED':
{
return {fetching: false, fetched: true, dashboard:action.payload.dashboard}
}
case 'UPDATEING_SYSTEM':
{
return Object.assign({}, state, {dashboard: action.payload.dashboard});
}
default:
break;
}
return state;
}
import io from 'socket.io-client'
import UniversalCookie from 'universal-cookie';
const cookies = new UniversalCookie();
//CHANGE URL FOR PRODUCTION
//-----------------------------------------
const socket = io.connect('http://localhost:8080');
//-----------------------------------------
export function fetchDashboard() {
return function(dispatch) {
socket.emit("get dashboard", {cookie:cookies.get("**********")});
socket.on("return dashboard", function(jDashboard) {
dispatch({
type: 'FETCH_DASHBOARD_FULFILLED',
payload: {
dashboard: jDashboard.dashboard
}
});
});
socket.on("errored", function(data) {
console.log(data);
dispatch({type: 'FETCH_DASHBOARD_REJECTED', payload: data});
});
socket.on("updating systems", function(data) {
console.log("updating...", data);
dispatch({
type: 'UPDATEING_SYSTEMS',
payload: {
dashboard: data.updatedSystems
}
});
});
}
}
const initState = {
dashboard: [],
fetching: false,
fetched: false,
error: null
}
export default function reducer(state = initState, action) {
switch (action.type) {
case "FETCH_DASHBOARD":
return {
...state,
fetching: true
}
case 'FETCH_DASHBOARD_REJECTED':
return {
...state,
fetching: false,
error: action.payload
}
case 'FETCH_DASHBOARD_FULFILLED':
return {fetching: false, fetched: true, dashboard: action.payload.dashboard}
case 'UPDATEING_SYSTEM':
let shelveNr = action.payload.dashboard[0].shelve;
let collectionNr = action.payload.dashboard[0].collection;
let systemNr = action.payload.dashboard[0].system;
let status = action.payload.dashboard[0].status;
console.log(" Status: ", state.dashboard[shelveNr]);
let newState = Object.assign({}, state, {
...state.dashboard[shelveNr].Collections[collectionNr].systems[systemNr].status,
status: status
});
return newState;
default:
return state;
}
}
DashboardReducer.js
import { applyMiddleware, createStore } from 'redux';
import {createLogger} from "redux-logger";
import thunk from 'redux-thunk'
import promise from 'redux-promise-middleware'
import reducers from './reducers';
const middleware = applyMiddleware(promise(), thunk, createLogger());
export default createStore(reducers, middleware);
const initState = {
dashboard: [],
fetching: false,
fetched: false,
error: null
}
export default function reducer(state = initState, action) {
switch (action.type) {
case "FETCH_DASHBOARD":
{
return {
...state,
fetching: true
}
}
case 'FETCH_DASHBOARD_REJECTED':
{
return {
...state,
fetching: false,
error: action.payload
}
}
case 'FETCH_DASHBOARD_FULFILLED':
{
return {fetching: false, fetched: true, dashboard:action.payload.dashboard}
}
case 'UPDATEING_SYSTEM':
{
return Object.assign({}, state, {dashboard: action.payload.dashboard});
}
default:
break;
}
return state;
}
import io from 'socket.io-client'
import UniversalCookie from 'universal-cookie';
const cookies = new UniversalCookie();
//CHANGE URL FOR PRODUCTION
//-----------------------------------------
const socket = io.connect('http://localhost:8080');
//-----------------------------------------
export function fetchDashboard() {
return function(dispatch) {
socket.emit("get dashboard", {cookie:cookies.get("**********")});
socket.on("return dashboard", function(jDashboard) {
dispatch({
type: 'FETCH_DASHBOARD_FULFILLED',
payload: {
dashboard: jDashboard.dashboard
}
});
});
socket.on("errored", function(data) {
console.log(data);
dispatch({type: 'FETCH_DASHBOARD_REJECTED', payload: data});
});
socket.on("updating systems", function(data) {
console.log("updating...", data);
dispatch({
type: 'UPDATEING_SYSTEMS',
payload: {
dashboard: data.updatedSystems
}
});
});
}
}
const initState = {
dashboard: [],
fetching: false,
fetched: false,
error: null
}
export default function reducer(state = initState, action) {
switch (action.type) {
case "FETCH_DASHBOARD":
return {
...state,
fetching: true
}
case 'FETCH_DASHBOARD_REJECTED':
return {
...state,
fetching: false,
error: action.payload
}
case 'FETCH_DASHBOARD_FULFILLED':
return {fetching: false, fetched: true, dashboard: action.payload.dashboard}
case 'UPDATEING_SYSTEM':
let shelveNr = action.payload.dashboard[0].shelve;
let collectionNr = action.payload.dashboard[0].collection;
let systemNr = action.payload.dashboard[0].system;
let status = action.payload.dashboard[0].status;
console.log(" Status: ", state.dashboard[shelveNr]);
let newState = Object.assign({}, state, {
...state.dashboard[shelveNr].Collections[collectionNr].systems[systemNr].status,
status: status
});
return newState;
default:
return state;
}
}
DashboardActions.js
import { applyMiddleware, createStore } from 'redux';
import {createLogger} from "redux-logger";
import thunk from 'redux-thunk'
import promise from 'redux-promise-middleware'
import reducers from './reducers';
const middleware = applyMiddleware(promise(), thunk, createLogger());
export default createStore(reducers, middleware);
const initState = {
dashboard: [],
fetching: false,
fetched: false,
error: null
}
export default function reducer(state = initState, action) {
switch (action.type) {
case "FETCH_DASHBOARD":
{
return {
...state,
fetching: true
}
}
case 'FETCH_DASHBOARD_REJECTED':
{
return {
...state,
fetching: false,
error: action.payload
}
}
case 'FETCH_DASHBOARD_FULFILLED':
{
return {fetching: false, fetched: true, dashboard:action.payload.dashboard}
}
case 'UPDATEING_SYSTEM':
{
return Object.assign({}, state, {dashboard: action.payload.dashboard});
}
default:
break;
}
return state;
}
import io from 'socket.io-client'
import UniversalCookie from 'universal-cookie';
const cookies = new UniversalCookie();
//CHANGE URL FOR PRODUCTION
//-----------------------------------------
const socket = io.connect('http://localhost:8080');
//-----------------------------------------
export function fetchDashboard() {
return function(dispatch) {
socket.emit("get dashboard", {cookie:cookies.get("**********")});
socket.on("return dashboard", function(jDashboard) {
dispatch({
type: 'FETCH_DASHBOARD_FULFILLED',
payload: {
dashboard: jDashboard.dashboard
}
});
});
socket.on("errored", function(data) {
console.log(data);
dispatch({type: 'FETCH_DASHBOARD_REJECTED', payload: data});
});
socket.on("updating systems", function(data) {
console.log("updating...", data);
dispatch({
type: 'UPDATEING_SYSTEMS',
payload: {
dashboard: data.updatedSystems
}
});
});
}
}
const initState = {
dashboard: [],
fetching: false,
fetched: false,
error: null
}
export default function reducer(state = initState, action) {
switch (action.type) {
case "FETCH_DASHBOARD":
return {
...state,
fetching: true
}
case 'FETCH_DASHBOARD_REJECTED':
return {
...state,
fetching: false,
error: action.payload
}
case 'FETCH_DASHBOARD_FULFILLED':
return {fetching: false, fetched: true, dashboard: action.payload.dashboard}
case 'UPDATEING_SYSTEM':
let shelveNr = action.payload.dashboard[0].shelve;
let collectionNr = action.payload.dashboard[0].collection;
let systemNr = action.payload.dashboard[0].system;
let status = action.payload.dashboard[0].status;
console.log(" Status: ", state.dashboard[shelveNr]);
let newState = Object.assign({}, state, {
...state.dashboard[shelveNr].Collections[collectionNr].systems[systemNr].status,
status: status
});
return newState;
default:
return state;
}
}
仪表板组件
import React, {Component} from 'react';
import './Dashboard.css';
import CollectionContainer from '../CollectionContainer/CollectionContainer';
import {fetchDashboard} from '../../actions/dashboardAction';
import {connect} from "react-redux";
@connect((store) => {
return {dashboard: store.dashboardReducer.dashboard};
})
export default class Dashboard extends Component {
componentWillMount() {
this.props.dispatch(fetchDashboard());
}
render() {
return (
<div className="App">
<div className="Head">HEADER</div>
<div className="CollectionContainer">
<CollectionContainer dashboard={this.props.dashboard}/>
</div>
</div>
);
}
}
您的操作类型为“更新系统”,但在减速器中有“更新系统”。此外,您不需要花括号 更新减速器,以使
壳体
正常工作
case 'UPDATEING_SYSTEMS':
return Object.assign({}, state, {dashboard: action.payload.dashboard});
在操作
更新系统中,您将完全替换仪表板数据。您打算合并数据吗?从长远来看,我希望:查找在当前状态下已更改的数据,在本例中为“系统”,然后使用从服务器推送的数据更新该“系统”。您是否看到数据通过“console.log”(“update…”,data);”输入?我建议使用MapStateTops/mapDispatchToProps。这个链接可能会有帮助:是的,数据就在那里。我已经更改了代码,以反映下面答案中截取的代码,但现在触发“更新系统”操作时页面保持空白。谢谢,我将相应地更新函数。我已经关注这一点一天了,没有注意到拼写错误。@Lasse一个原因让const ACTION\u NAME='updateing\u SYSTEM',例如:)刚刚检查过。它会触发重新呈现,但在该操作后页面将保持空白。就我所知,您需要使用mapDispatchToProps
触发您的操作并更新状态-此示例非常简单-