[英]Authentication with Next.js and Redux
这是我的情况。 我正在尝试在加载时对用户进行身份验证,并且需要在pages/_app.js
文件中运行身份验证。 这是错误useReduxContext.js:24 Uncaught Error: could not find react-redux context value; please ensure the component is wrapped in a <Provider>
useReduxContext.js:24 Uncaught Error: could not find react-redux context value; please ensure the component is wrapped in a <Provider>
中。 有没有办法在包装的<Provider>
中运行身份验证。 这是codesandbox的 链接
文件页面/_app.js
import React, { useEffect } from 'react';
import { Provider, useDispatch } from 'react-redux';
import { auth } from '../lib/firebase.js';
import { getUserLoggedIn } from '../store/user.js';
import configureAppStore from '../store/configureAppStore.js';
import Header from '../components/nav/Header.jsx';
const store = configureAppStore();
function MyApp({ Component, pageProps }) {
const dispatch = useDispatch();
// to check firebase auth state
useEffect(() => {
const unsubscribe = auth.onAuthStateChanged(async (user) => {
if (user) {
const idTokenResult = await user.getIdTokenResult();
dispatch(
getUserLoggedIn({
email: user.email,
token: idTokenResult.token,
})
);
}
});
// cleanup
return () => unsubscribe();
}, []);
return (
<>
<Provider store={store}>
<Header />
<Component {...pageProps} />
</Provider>
</>
);
}
export default MyApp;
这个问题的一个简单解决方案是创建一个空组件,在 useEffect 中为您运行身份验证。
import React, { useEffect } from 'react';
import { Provider, useDispatch } from 'react-redux';
import { auth } from '../lib/firebase.js';
import { getUserLoggedIn } from '../store/user.js';
import configureAppStore from '../store/configureAppStore.js';
import Header from '../components/nav/Header.jsx';
const store = configureAppStore();
function MyApp({ Component, pageProps }) {
const AuthComponent = React.memo(() => {
const dispatch = useDispatch();
// to check firebase auth state
useEffect(() => {
const unsubscribe = auth.onAuthStateChanged(async (user) => {
if (user) {
const idTokenResult = await user.getIdTokenResult();
dispatch(
getUserLoggedIn({
email: user.email,
token: idTokenResult.token,
})
);
}
});
// cleanup
return () => unsubscribe();
}, []);
return null;
})
return (
<>
<Provider store={store}>
<AuthComponent />
<Header />
<Component {...pageProps}
/>
</Provider>
</>
);
}
export default MyApp;
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