我正在尝试将redux集成添加到我的Next.js应用程序中,但我无法让服务器端渲染按照应有的方式工作。我的实施基于the official nextjs redux example。
最后,当页面从服务器返回时,数据在输出中以JSON数据的形式出现,但基于此数据的实际呈现没有发生。奇怪的是,在我使用redux之前,内容DID呈现它应该的方式。
当然,我也得到了React的校验和警告,表明服务器上的标记是不同的。
我不知道如何在服务器端正常工作。有什么东西我不见了吗?
这是Next.js生成的HTML:
<h1 data-reactid="3">Test page</h1>
</div></div></div><div id="__next-error"></div></div><div><script>
__NEXT_DATA__ = {"props":{"isServer":true,"store":{},
"initialState":{"authors":{"loading":false,"items":{"4nRpnr66B2CcQ4wsY04CIQ":… }
,"initialProps":{}},"pathname":"/test","query":{},"buildId":1504364251326,"buildStats":null,"assetPrefix":"","nextExport":false,"err":null,"chunks":[]}
module={}
__NEXT_LOADED_PAGES__ = []
__NEXT_LOADED_CHUNKS__ = []
__NEXT_REGISTER_PAGE = function (route, fn) {
__NEXT_LOADED_PAGES__.push({ route: route, fn: fn })
}
__NEXT_REGISTER_CHUNK = function (chunkName, fn) {
__NEXT_LOADED_CHUNKS__.push({ chunkName: chunkName, fn: fn })
}
</script><script async="" id="__NEXT_PAGE__/test" type="text/javascript" src="/_next/1504364251326/page/test"></script><script async="" id="__NEXT_PAGE__/_error" type="text/javascript" src="/_next/1504364251326/page/_error/index.js"></script><div></div><script type="text/javascript" src="/_next/1504364251326/manifest.js"></script><script type="text/javascript" src="/_next/1504364251326/commons.js"></script><script type="text/javascript" src="/_next/1504364251326/main.js"></script></div></body></html>
如您所见,initialState
值已填充,它包含所有必需的数据,但DOM仍显示为空!。
如果我在客户端渲染dom,js将获取初始内容并重新呈现包含已加载内容的页面。
这是我的测试页面JS文件:
import React from 'react'
import map from 'lodash.map';
import { initStore } from '../lib/store';
import * as actions from '../lib/actions';
import withRedux from 'next-redux-wrapper';
class IndexPage extends React.PureComponent {
static getInitialProps = ({ store, req }) => Promise.all([
store.dispatch(actions.fetchAll)
]).then( () => ({}) )
render() {
const latestPlants = this.props.plants.latest || [];
return (
<div>
<h1>Test page</h1>
{ map(this.props.plants.items, p => (
<div>{p.fields.name}</div>
))}
</div>
)
}
}
export default withRedux(initStore, data => data, null)(IndexPage)
无论它值多少,这都是我上面所说的行动:
export const fetchAll = dispatch => {
dispatch({
type: LOADING_ALL
})
return axios.get('/api/frontpage')
.then( response => {
const data = response.data
dispatch({
type: RESET_AUTHORS,
payload: data.authors
})
dispatch({
type: RESET_PLANTS,
payload: data.plants
})
dispatch({
type: RESET_POSTS,
payload: data.posts
})
});
}
对此有任何帮助将不胜感激,我对如何按预期进行此项工作感到茫然。有人有任何线索吗?如果有什么我可以澄清的话,还请评论。
答案 0 :(得分:0)
我建议将代码分成不同的部分。首先,我将创建一个商店,其中包含以下内容:
import { createStore, applyMiddleware } from 'redux';
import thunkMiddleware from 'redux-thunk';
import reducer from './reducers'
export const initStore = (initialState = {}) => {
return createStore(reducer, initialState, applyMiddleware(thunkMiddleware))
}
然后我将使用要处理的类型创建商店:
const initialState = { 作者:null, 植物:null, 帖子:null }
export default (state = initialState, action) => {
switch (action.type) {
case 'RESET':
return Object.assign({}, state, {
authors: action.authors,
plants: action.plants,
posts: action.posts
})
default:
return state
}
}
在行动中,我会有这样的事情:
export const fetchAll = dispatch => {
return axios.get('/api/frontpage')
.then( response => {
const data = response.data
dispatch({
type: 'RESET',
authors: data.authors,
plants: data.plants,
posts: data.posts
})
});
}
索引将是这样的:
import React from 'react'
import { initStore } from '../store'
import withRedux from 'next-redux-wrapper'
import Main from '../components'
class Example extends React.Component {
render() {
return (
<div>
<Main />
</div>
)
}
}
export default withRedux(initStore, null)(Example)
组件Main:
import React, {Component} from 'react'
import { connect } from 'react-redux'
import { bindActionCreators } from 'redux'
import { fetchAll } from '../../actions'
class Data extends Component {
componentWillMount() {
this.props.fetchAll()
}
render() {
const { state } = this.props
return (
<div>
<h1>Test page</h1>
{ map(state.plants.items, p => (
<div>{p.fields.name}</div>
))}
</div>
)
}
}
const mapStateToProps = (state) => {
return {
state
}
}
const mapDistpatchToProps = dispatch => {
return {
fetchAll: bindActionCreators(fetchAll, dispatch)
}
}
export default connect(mapStateToProps, mapDistpatchToProps)(Data)
根据需要进行更改。
您可以在此处查看一些完整示例:
Form handler
Server Auth