Below is the code located at "Pages/home.js". // localhost:3000/home
import axios from 'axios';
import Section1 from '../components/home-sections/section-1';
const Homepage = ({ show }) => {
const Html = JSON.parse(show.response.DesktopHTML);
const renderSection = () => {
return Html.map((itemData,index)=>{
return(<div key={index}>{itemData.DisplayName}</div>)
})
}
return(
<div>
{ renderSection()}
<Section1 />
</div>
)
}
export const getServerSideProps = async ({ query }) => {
try {
const response = await axios.get(
`https://api.example.com/getHomeSection?title=Section 1`
);
return {
props: {
show: response.data,
},
};
} catch (error) {
return {
props: {
error: error.error,
},
};
}
};
export default Homepage;
Now same code I added into section-1.js and this file is located to "components/home-sections/section-1.js"
Now getServerSideProps is working fine in home.js, but in section-1.js it is not working.
Error: TypeError: show is undefined in section-1.js
You cannot use getServerSideProps in non-page components. You can either pass the prop from Home to HomeSection or create a context so the value can be available globally from the component tree
getServerSideProps can only be exported from a page. You can’t export
it from non-page files.
https://nextjs.org/docs/basic-features/data-fetching#only-allowed-in-a-page-2
getServerSideProps can only be exported from Page components. It will not be run on components imported into a page.
However, you could export a function from the component that returns the props, and call that function from the page's getServerSideProps function.
Create a getServerSideProps function on the component.
// #components/MyComponent.tsx
import { GetServerSidePropsContext } from 'next';
function MyComponent(props: IMyComponentProps) {
return (<div>MyComponent</div>;)
}
MyComponent.getServerSideProps = async (context: GetServerSidePropsContext): Promise<{ props: IMyComponentProps }> => {
return { props: { ... } };
}
export default MyComponent;
In your page's getServerSideProps function, call the component's getServerSideProps function and merge the props from the component with the props from the page.
// mypage.tsx
import MyComponent from '#components/MyComponent';
const Page: NextPageWithLayout = (props: IIndexPageProps) => {
return <MyComponent />;
}
export async function getServerSideProps(context: GetServerSidePropsContext): Promise<{ props: IIndexPageProps }> {
let componentServerSideProps = await MyComponent.getServerSideProps(context);
let otherServerSideProps = { props: { ... } };
return {
props: {
...componentServerSideProps.props,
...otherServerSideProps.props
}
};
}
Related
I have created an app using Next.js, Apollo, and I fetch data with WPGraphQL. So far I have been able to fetch data using getStaticProps() and getServerSideProps() on pages files.
However it doesn't work with client-side rendering in Components as it either keep loading or logs data as "undefined". The weird thing is the same implementation works when I fetch data from a non-WPGraphQL url.
Here is my code.
_app.js
import 'bootstrap/dist/css/bootstrap.css';
import '../public/css/styles.css';
import Header from '../components/Header';
import Footer from '../components/Footer';
import { ApolloProvider } from "#apollo/client";
import client from "../apollo-client";
function MyApp({ Component, pageProps }) {
return (
<>
<ApolloProvider client={client}>
<Header />
<Component {...pageProps} />
<Footer />
</ApolloProvider>
</>
);
}
export default MyApp;
./apollo-client.js
import { ApolloClient, InMemoryCache } from "#apollo/client";
const client = new ApolloClient({
uri: process.env.WP_API_URL,
cache: new InMemoryCache(),
headers: {
authorization: process.env.WP_AUTHORIZATION,
},
});
export default client;
./components/ClientOnly.js
import { useEffect, useState } from "react";
export default function ClientOnly({ children, ...delegated }) {
const [hasMounted, setHasMounted] = useState(false);
useEffect(() => {
setHasMounted(true);
}, []);
if (!hasMounted) {
return null;
}
return <div {...delegated}>{children}</div>;
}
.components/Articles.js
import { useQuery, gql } from "#apollo/client";
const QUERY = gql`
query Articles {
posts(where: { categoryName: "articles", status: PUBLISH}, last: 3) {
edges {
node {
author {
node {
name
}
}
featuredImage {
node {
sourceUrl
srcSet
}
}
title
slug
}
}
}
}
`;
export default function Articles() {
const { data, loading, error } = useQuery(QUERY);
if (loading) {
return <h2>Loading...</h2>;
}
if (error) {
console.error(error);
return null;
}
const posts = data.posts.edges.map(({ node }) => node);
console.log('THis is DATA',data)
return (
<div>
...
I have an edit page that will be rendered with an id parameter and it works fine when application is running but while building the nextjs app I get this error
[Error: ENOENT: no such file or directory, rename 'C:\Users\Ahsan Nisar\Documents\GitHub\customer-portal\frontend.next\export\en\companies\edit[id].html' -> 'C:\Users\Ahsan Nisar\Documents\GitHub\customer-portal\frontend.next\server\pages\en\companies\edit[id].html']
the full error
I am not sure what this error is related to or what mistake am I making in my code that this error is occuring during build time.
Here is the code of my page
import { WithAuthorization } from 'common/roq-hocs';
import { MainLayout } from 'layouts';
import { useTranslation } from 'next-i18next';
import { serverSideTranslations } from 'next-i18next/serverSideTranslations';
import React, { FunctionComponent } from 'react';
import { CompaniesEditView } from 'views/companies-edit';
const CompanyCreatePage: FunctionComponent = () => {
const { t } = useTranslation('companiesEdit');
return (
<MainLayout title={t('title')}>
<WithAuthorization
permissionKey="companies.update"
failComponent={
<div className="mt-16 text-2xl text-center text-gray-600">
<span>{t('noView')}</span>
</div>
}
>
<CompaniesEditView />
</WithAuthorization>
</MainLayout>
);
};
export const getStaticProps = async ({ locale }) => ({
props: {
...(await serverSideTranslations(locale, ['common', 'companiesEdit'])),
},
});
export const getStaticPaths = () => ({
paths: ['/companies/edit/[id]'],
fallback: true,
});
export default CompanyCreatePage;
I think that the problem might be that you are not returning the expected paths model in getStaticPaths function.
Minimal example of this page:
import { GetStaticPaths, GetStaticProps } from 'next';
import { useRouter } from 'next/router';
const CompanyCreatePage = () => {
const router = useRouter();
const { id } = router.query;
return (
<div>
<h1>Company Create Page Content for id: {id}</h1>
</div>
);
};
export const getStaticPaths: GetStaticPaths = async () => {
// Get all possible 'id' values via API, file, etc.
const ids = ['1', '2', '3', '4', '5']; // Example
const paths = ids.map(id => ({
params: { id },
}));
return { paths, fallback: false };
};
export const getStaticProps: GetStaticProps = async context => {
return { props: {} };
};
export default CompanyCreatePage;
Then, navigating to the page /users/edit/3/ returns the following content
Take into account that the fallback param in getStaticPaths changes the behavior of getStaticProps function. For reference, see the documentation
Below is the code located at "Pages/home.js". // localhost:3000/home
import axios from 'axios';
import Section1 from '../components/home-sections/section-1';
const Homepage = ({ show }) => {
const Html = JSON.parse(show.response.DesktopHTML);
const renderSection = () => {
return Html.map((itemData,index)=>{
return(<div key={index}>{itemData.DisplayName}</div>)
})
}
return(
<div>
{ renderSection()}
<Section1 />
</div>
)
}
export const getServerSideProps = async ({ query }) => {
try {
const response = await axios.get(
`https://api.example.com/getHomeSection?title=Section 1`
);
return {
props: {
show: response.data,
},
};
} catch (error) {
return {
props: {
error: error.error,
},
};
}
};
export default Homepage;
Now same code I added into section-1.js and this file is located to "components/home-sections/section-1.js"
Now getServerSideProps is working fine in home.js, but in section-1.js it is not working.
Error: TypeError: show is undefined in section-1.js
You cannot use getServerSideProps in non-page components. You can either pass the prop from Home to HomeSection or create a context so the value can be available globally from the component tree
getServerSideProps can only be exported from a page. You can’t export
it from non-page files.
https://nextjs.org/docs/basic-features/data-fetching#only-allowed-in-a-page-2
getServerSideProps can only be exported from Page components. It will not be run on components imported into a page.
However, you could export a function from the component that returns the props, and call that function from the page's getServerSideProps function.
Create a getServerSideProps function on the component.
// #components/MyComponent.tsx
import { GetServerSidePropsContext } from 'next';
function MyComponent(props: IMyComponentProps) {
return (<div>MyComponent</div>;)
}
MyComponent.getServerSideProps = async (context: GetServerSidePropsContext): Promise<{ props: IMyComponentProps }> => {
return { props: { ... } };
}
export default MyComponent;
In your page's getServerSideProps function, call the component's getServerSideProps function and merge the props from the component with the props from the page.
// mypage.tsx
import MyComponent from '#components/MyComponent';
const Page: NextPageWithLayout = (props: IIndexPageProps) => {
return <MyComponent />;
}
export async function getServerSideProps(context: GetServerSidePropsContext): Promise<{ props: IIndexPageProps }> {
let componentServerSideProps = await MyComponent.getServerSideProps(context);
let otherServerSideProps = { props: { ... } };
return {
props: {
...componentServerSideProps.props,
...otherServerSideProps.props
}
};
}
My NextJS project has been giving me grief over Graph QL these days. I've been trying to implement an Apollo client solution to retrieve data from a remote GraphQL server into a custom component. But no matter which solution I try, I always end up with this error. Here's my current react-apollo implementation:
// /lib/with-apollo-client.js
import React from "react";
import Head from "next/head";
import { getDataFromTree } from "react-apollo";
import initApollo from "./init-apollo";
export default App => {
return class WithData extends React.Component {
static displayName = `WithData(${App.displayName})`;
static async getInitialProps(ctx) {
const { Component, router } = ctx;
const apollo = initApollo({});
ctx.ctx.apolloClient = apollo;
let appProps = {};
if (App.getInitialProps) {
appProps = await App.getInitialProps(ctx);
}
// Run all GraphQL queries in the component tree
// and extract the resulting data
if (!process.browser) {
try {
// Run all GraphQL queries
await getDataFromTree(
<App
{...appProps}
Component={Component}
router={router}
apolloClient={apollo}
/>
);
} catch (error) {
console.error("Error while running `getDataFromTree`", error);
}
// getDataFromTree does not call componentWillUnmount
// head side effect therefore need to be cleared manually
Head.rewind();
}
// Extract query data from the Apollo store
const apolloState = apollo.cache.extract();
return {
...appProps,
apolloState
};
}
constructor(props) {
super(props);
this.apolloClient = initApollo(props.apolloState);
}
render() {
return <App {...this.props} apolloClient={this.apolloClient} />;
}
};
};
// /lib/init-apollo.js
import { ApolloClient, InMemoryCache, HttpLink } from 'apollo-boost'
import fetch from 'isomorphic-unfetch'
let apolloClient = null
// Polyfill fetch() on the server (used by apollo-client)
if (!process.browser) {
global.fetch = fetch
}
function create (initialState) {
// Check out https://github.com/zeit/next.js/pull/4611 if you want to use the AWSAppSyncClient
return new ApolloClient({
connectToDevTools: process.browser,
ssrMode: !process.browser, // Disables forceFetch on the server (so queries are only run once)
link: new HttpLink({
uri: 'https://api.graph.cool/simple/v1/cixmkt2ul01q00122mksg82pn', // Server URL (must be absolute)
credentials: 'same-origin' // Additional fetch() options like `credentials` or `headers`
}),
cache: new InMemoryCache().restore(initialState || {})
})
}
export default function initApollo (initialState) {
// Make sure to create a new client for every server-side request so that data
// isn't shared between connections (which would be bad)
if (!process.browser) {
return create(initialState)
}
// Reuse client on the client-side
if (!apolloClient) {
apolloClient = create(initialState)
}
return apolloClient
}
The component I'm retrieving data into looks like this:
// /components/PostsList2.jsx
import { Query } from 'react-apollo'
import gql from 'graphql-tag'
export const allUsersQuery = gql`
query allUsers($first: Int!, $skip: Int!) {
allUsers(orderBy: createdAt_DESC, first: $first, skip: $skip) {
id
firstName
createdAt
}
_allUsersMeta {
count
}
}
`
export const allUsersQueryVars = {
skip: 0,
first: 10
}
export default function PostsList2 () {
return (
<Query query={allUsersQuery} variables={allUsersQueryVars}>
{({ loading, error, data: { allUsers, _allUsersMeta }, fetchMore }) => {
if (error) return <aside>Error loading users!</aside>
if (loading) return <div>Loading</div>
const areMorePosts = allUsers.length < _allUsersMeta.count
return (
<section>
<ul>
{allUsers.map((user, index) => (
<li key={user.id}>
<div>
<span>{index + 1}. </span>
<div>{user.firstName}</div>
</div>
</li>
))}
</ul>
{areMorePosts ? (
<button onClick={() => loadMorePosts(allUsers, fetchMore)}>
{' '}
{loading ? 'Loading...' : 'Show More'}{' '}
</button>
) : (
''
)}
</section>
)
}}
</Query>
)
}
function loadMorePosts (allUsers, fetchMore) {
fetchMore({
variables: {
skip: allUsers.length
},
updateQuery: (previousResult, { fetchMoreResult }) => {
if (!fetchMoreResult) {
return previousResult
}
return Object.assign({}, previousResult, {
// Append the new users results to the old one
allUsers: [...previousResult.allUsers, ...fetchMoreResult.allUsers]
})
}
})
}
Since this is a NextJS project, there's also an _app.jsx that I've wrapped in a special provider component:
// /pages._app.jsx
/* eslint-disable max-len */
import '../static/styles/fonts.scss';
import '../static/styles/style.scss';
import '../static/styles/some.css';
import CssBaseline from '#material-ui/core/CssBaseline';
import { ThemeProvider } from '#material-ui/styles';
import jwt from 'jsonwebtoken';
import withRedux from 'next-redux-wrapper';
import App, {
Container,
} from 'next/app';
import Head from 'next/head';
import React from 'react';
import { Provider } from 'react-redux';
import makeStore from '../reducers';
import mainTheme from '../themes/main-theme';
import getSessIDFromCookies from '../utils/get-sessid-from-cookies';
import getLanguageFromCookies from '../utils/get-language-from-cookies';
import getUserTokenFromCookies from '../utils/get-user-token-from-cookies';
import removeFbHash from '../utils/remove-fb-hash';
import withApolloClient from '../lib/with-apollo-client'
import { ApolloProvider } from 'react-apollo'
class MyApp extends App {
static async getInitialProps({ Component, ctx }) {
let userToken;
let sessID;
let language;
if (ctx.isServer) {
ctx.store.dispatch({ type: 'UPDATEIP', payload: ctx.req.headers['x-real-ip'] });
userToken = getUserTokenFromCookies(ctx.req);
sessID = getSessIDFromCookies(ctx.req);
language = getLanguageFromCookies(ctx.req);
const dictionary = require(`../dictionaries/${language}`);
ctx.store.dispatch({ type: 'SETLANGUAGE', payload: dictionary });
if(ctx.res) {
if(ctx.res.locals) {
if(!ctx.res.locals.authenticated) {
userToken = null;
sessID = null;
}
}
}
if (userToken && sessID) { // TBD: validate integrity of sessID
const userInfo = jwt.verify(userToken, process.env.JWT_SECRET);
ctx.store.dispatch({ type: 'ADDUSERINFO', payload: userInfo });
}
ctx.store.dispatch({ type: 'ADDSESSION', payload: sessID }); // component will be able to read from store's state when rendered
}
const pageProps = Component.getInitialProps ? await Component.getInitialProps(ctx) : {};
return { pageProps };
}
componentDidMount() {
// Remove the server-side injected CSS.
const jssStyles = document.querySelector('#jss-server-side');
if (jssStyles) {
jssStyles.parentNode.removeChild(jssStyles);
}
// Register serviceWorker
if ('serviceWorker' in navigator) { navigator.serviceWorker.register('/serviceWorker.js'); }
// Handle FB's ugly redirect URL hash
removeFbHash(window, document);
}
render() {
const { Component, pageProps, store, apolloClient } = this.props;
return (
<Container>
<Head>
// redacted for brevity
</Head>
<ThemeProvider theme={mainTheme}>
{/* CssBaseline kickstart an elegant, consistent, and simple baseline to build upon. */}
<CssBaseline />
<ApolloProvider client={apolloClient}>
<Provider store={store}>
<Component {...pageProps} />
</Provider>
</ApolloProvider>
</ThemeProvider>
</Container>
);
}
}
export default withApolloClient(withRedux(makeStore)(MyApp));
So with this setup, when I compile and run my app, it throws the following:
TypeError: Cannot read property 'allUsers' of undefined
I'm really lost! The repo is up at https://github.com/amitschandillia/proost/tree/master/web.
I'm trying to add redux integration to my Next.js app, but I can't get serverside rendering working the way it should. I based my implementation off the official nextjs redux example.
In the end, when the page comes back from the server, the data is present as JSON data in the output, but the actual rendering based on this data did not happen. The weird thing is that before I used redux, the content DID render the way it should.
Naturally, I'm also getting React's checksum warning, indicating that the markup on the server is different.
I have no idea how to make this work properly on the server side. Is there something that I'm missing?
Here's the HTML generated by Next.js:
<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>
AS you can see, the initialState value is populated, it contains all the required data, but the DOM still shows empty!.
If I render the dom on the client side, the js picks up the initial content and rerenders the page with the loaded content in place.
Here's my test page JS file:
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)
For whatever it's worth, here's the action that I call above:
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
})
});
}
Any help with this would be greatly appreciated, I'm at a loss on how to make this work as expected. Anyone have any leads? Please also comment if there's something I can clarify.
I recommend to split the code in different parts. First, I'll create a store, with something like this:
import { createStore, applyMiddleware } from 'redux';
import thunkMiddleware from 'redux-thunk';
import reducer from './reducers'
export const initStore = (initialState = {}) => {
return createStore(reducer, initialState, applyMiddleware(thunkMiddleware))
}
Then I'll create the store with the types to handle:
const initialState = {
authors: null,
plants: null,
posts: 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
}
}
In the actions I'll have something like this:
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
})
});
}
The index will be something like this:
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)
And the component 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)
Make the changes for what you need.
You can check some full examples here:
Form handler
Server Auth