Could not find "client" in the context of ApolloConsumer - reactjs

I am trying to implement react-apollo to store my local states, I can write to them using client.writeData() but when i try to access them, I keep getting errors
I tried following https://github.com/wesbos/Advanced-React/tree/master/finished-application/frontend. I tried implementing apollo-link-state as well but keeps throwing error.
withData.js
import withApollo from "next-with-apollo";
import { ApolloClient } from "apollo-client";
import { createHttpLink } from "apollo-link-http";
import { InMemoryCache } from "apollo-cache-inmemory";
const cache = new InMemoryCache();
function createClient({ headers }) {
return new ApolloClient({
cache,
link: new createHttpLink({
uri: "http://localhost:4000/",
request: operation => {
operation.setContext({
fetchOptions: {
credentials: "same-origin"
},
headers: {
"Content-Type": "application/json"
}
});
}
}),
clientState: {
resolvers: {
Query: {
getLocalData: (_, { text }, { cache }) => {
const query = gql`
query getLocalData {
loading #client
}
`;
const previous = cache.readQuery({ query });
return previous.loading;
}
},
Muatation: {
toggleLoading: (_, { text }, { cache }) => {
const query = gql`
query getLocalData {
loading #client
}
`;
var previous = cache.readQuery({ query });
cache.writeData({ data: { loading: !previous.loading } });
return null;
}
}
},
defaults: {
loading: true,
},
typeDefs: {}
}
});
}
export default withApollo(createClient);
_app.js
import App, { Container } from 'next/app';
import Page from '../components/Page';
import { ApolloProvider } from 'react-apollo';
import withData from '../lib/withData';
class MyApp extends App {
static async getInitialProps({ Component, ctx }) {
let pageProps = {};
if (Component.getInitialProps) {
pageProps = await Component.getInitialProps(ctx);
}
// this exposes the query to the user
pageProps.query = ctx.query;
return { pageProps };
}
render() {
const { Component, apollo, pageProps } = this.props;
return (
<Container>
<ApolloProvider client={apollo}>
<Page>
<Component {...pageProps} />
</Page>
</ApolloProvider>
</Container>
);
}
}
export default withData(MyApp);
I expect to run efficiently
but the actual output is: Could not find "client" in the context of ApolloConsumer. Wrap the root component in an

Related

How to fetch date by Query Apollo?

My problem is that I cannot see any date I try to fetch.
component.js
render(){
return (
<Query query={QueryCategories}>
{({ data }) => {
console.log("data", data)
return(
data.map((m)=> <p>{m}</p>)
)
}}
</Query>)}
query.js
import { gql } from "#apollo/client";
export const QueryCategories = gql`
query getCategories {
categories {
name
}
}
`;
index.js
import { ApolloClient, InMemoryCache } from '#apollo/client';
const cache = new InMemoryCache({
typePolicies: {
AttributeSet: {
keyFields: false,
},
Attribute: {
keyFields: false,
},
},
});
const client = new ApolloClient({
uri: 'http://localhost:4000',
cache,
});
My main goal is give it as props to another component and connect to redux

NextJs GraphQL Subscription: How to set up connect api with Apolo [duplicate]

I am new to NextJS. I have a page that needs to display real-time data pulled from a Hasura GraphQL backend.
In other non-NextJS apps, I have used GraphQL subscriptions with the Apollo client library. Under the hood, this uses websockets.
I can get GraphQL working in NextJS when it's not using subscriptions. I'm pretty sure this is running on the server-side:
import React from "react";
import { AppProps } from "next/app";
import withApollo from 'next-with-apollo';
import { ApolloProvider } from '#apollo/react-hooks';
import ApolloClient, { InMemoryCache } from 'apollo-boost';
import { getToken } from "../util/auth";
interface Props extends AppProps {
apollo: any
}
const App: React.FC<Props> = ({ Component, pageProps, apollo }) => (
<ApolloProvider client={apollo}>
<Component {...pageProps}/>
</ApolloProvider>
);
export default withApollo(({ initialState }) => new ApolloClient({
uri: "https://my_hasura_instance.com/v1/graphql",
cache: new InMemoryCache().restore(initialState || {}),
request: (operation: any) => {
const token = getToken();
operation.setContext({
headers: {
authorization: token ? `Bearer ${token}` : ''
}
});
}
}))(App);
And I use it this way:
import { useQuery } from '#apollo/react-hooks';
import { gql } from 'apollo-boost';
const myQuery = gql`
query {
...
}
`;
const MyComponent: React.FC = () => {
const { data } = useQuery(myQuery);
return <p>{JSON.stringify(data)}</p>
}
However, I would instead like to do this:
import { useSubscription } from '#apollo/react-hooks';
import { gql } from 'apollo-boost';
const myQuery = gql`
subscription {
...
}
`;
const MyComponent: React.FC = () => {
const { data } = useSubscription(myQuery);
return <p>{JSON.stringify(data)}</p>
}
What I've tried
I've tried splitting the HttpLink and WebsocketLink elements in the ApolloClient, like so:
import React from "react";
import { AppProps } from "next/app";
import { ApolloProvider } from '#apollo/react-hooks';
import withApollo from 'next-with-apollo';
import { InMemoryCache } from "apollo-cache-inmemory";
import ApolloClient from "apollo-client";
import { split } from 'apollo-link';
import { HttpLink } from 'apollo-link-http';
import { WebSocketLink } from 'apollo-link-ws';
import { getMainDefinition } from 'apollo-utilities';
import { getToken } from "../util/auth";
interface Props extends AppProps {
apollo: any
}
const App: React.FC<Props> = ({ Component, pageProps, apollo }) => (
<ApolloProvider client={apollo}>
<Component {...pageProps}/>
</ApolloProvider>
);
const wsLink = new WebSocketLink({
uri: "wss://my_hasura_instance.com/v1/graphql",
options: {
reconnect: true,
timeout: 10000,
connectionParams: () => ({
headers: {
authorization: getToken() ? `Bearer ${getToken()}` : ""
}
})
},
});
const httpLink = new HttpLink({
uri: "https://hasura-g3uc.onrender.com/v1/graphql",
});
const link = process.browser ? split(
({ query }) => {
const definition = getMainDefinition(query);
return (
definition.kind === 'OperationDefinition' &&
definition.operation === 'subscription'
);
},
wsLink,
httpLink
) : httpLink;
export default withApollo(({ initialState }) => new ApolloClient({
link: link,
cache: new InMemoryCache().restore(initialState || {}),
}))(App);
But when I load the page, I get an Internal Server Error, and this error in the terminal:
Error: Unable to find native implementation, or alternative implementation for WebSocket!
It seems to me that the ApolloClient is then being generated on the server-side, where there is no WebSocket implementation. How can I make this happen on the client-side?
Found workaround to make it work, take look at this answer https://github.com/apollographql/subscriptions-transport-ws/issues/333#issuecomment-359261024
the reason was due to server-side rendering; these statements must run in the browser, so we test if we have process.browser !!
relevant section from the attached github link:
const wsLink = process.browser ? new WebSocketLink({ // if you instantiate in the server, the error will be thrown
uri: `ws://localhost:4000/subscriptions`,
options: {
reconnect: true
}
}) : null;
const httplink = new HttpLink({
uri: 'http://localhost:3000/graphql',
credentials: 'same-origin'
});
const link = process.browser ? split( //only create the split in the browser
// split based on operation type
({ query }) => {
const { kind, operation } = getMainDefinition(query);
return kind === 'OperationDefinition' && operation === 'subscription';
},
wsLink,
httplink,
) : httplink;
This answer seems to be more actual
https://github.com/apollographql/subscriptions-transport-ws/issues/333#issuecomment-775578327
You should install ws by npm i ws and add webSocketImpl: ws to WebSocketLink argument.
import ws from 'ws';
const wsLink = new WebSocketLink({
uri: endpoints.ws,
options: {
reconnect: true,
connectionParams: () => ({
...getToken() && {Authorization: getToken()}
})
},
webSocketImpl: ws
});
Solution: Make wsLink a function variable like the code below.
// src/apollo.ts
import { ApolloClient, HttpLink, InMemoryCache } from "#apollo/client";
import { GraphQLWsLink } from "#apollo/client/link/subscriptions";
import { createClient } from "graphql-ws";
const httpLink = new HttpLink({
uri: 'http://localhost:3000/graphql'
});
const wsLink = () => {
return new GraphQLWsLink(createClient({
url: 'ws://localhost:3000/graphql'
}));
}
export const apolloClient = new ApolloClient({
link: typeof window === 'undefined' ? httpLink : wsLink(),
cache: new InMemoryCache(),
});
// pages/_app.tsx
import { ApolloProvider } from "#apollo/client";
import { apolloClient } from "../src/apollo";
function MyApp({ Component, pageProps }) {
return (
<ApolloProvider client={apolloClient}>
<Component {...pageProps} />
</ApolloProvider>
);
}

getStaticProps returns an empty object

I'm using nextJS V9.5.5 with wp-graphql and apolloClient to get data from WordPress. Everything works fine, but when I try to return context (in the purpose of getting query) from getStaticProps() like it's described in docs, it returns an empty object.
Custom App:
import React from "react";
import getConfig from "next/config";
import LayoutOuter from "../components/LayoutOuter";
import "bootstrap/dist/css/bootstrap.css";
import { ApolloProvider } from "#apollo/client";
import { useApollo } from "../lib/apolloClient";
import { initializeApollo } from "../lib/apolloClient";
import { gql } from "#apollo/client";
const { serverRuntimeConfig, publicRuntimeConfig } = getConfig();
const { DOMAIN } = publicRuntimeConfig;
function CustomApp({ pageProps, Component, props }) {
const apolloClient = useApollo(pageProps.initialApolloState);
return (
<ApolloProvider client={apolloClient}>
{console.log("_app", props)}
<LayoutOuter>
<Component {...pageProps} />
</LayoutOuter>
</ApolloProvider>
);
}
CustomApp.getInitialProps = async (ctx) => {
const apolloClient = initializeApollo();
await apolloClient.query({
query: gql`
{
// my graphql query here
}
`,
});
return {
props: {
initialApolloState: apolloClient.cache.extract(),
ctx: JSON.stringify(ctx),
},
};
};
export default CustomApp;
One of the page:
import React, { Component, useEffect, useState } from "react";
import getConfig from "next/config";
import { NextSeo } from "next-seo";
const { serverRuntimeConfig, publicRuntimeConfig } = getConfig();
const { DOMAIN, SITENAME } = publicRuntimeConfig;
import { initializeApollo } from "../lib/apolloClient";
import { gql } from "#apollo/client";
import "./services.module.scss";
const Home = (props) => {
let currentPage = Object.values(props.initialApolloState.ROOT_QUERY)[1];
const {
title,
metadesc,
metaRobotsNoindex,
metaRobotsNofollow,
metaRobotsAdv,
opengraphTitle,
opengraphDescription,
opengraphImage,
twitterTitle,
twitterDescription,
twitterImage,
} = currentPage.seo;
return (
<>
{console.log("project", props)}
<NextSeo
noindex={metaRobotsNoindex}
nofollow={metaRobotsNofollow}
title={title != "" ? title : `${props.data.pagetitle} - ${SITENAME}`}
description={metadesc}
canonical={DOMAIN}
openGraph={{
url: DOMAIN,
title:
opengraphTitle != ""
? opengraphTitle
: `${props.data.pagetitle} - Garrison Collection`,
description: opengraphDescription,
images: [
{
url: opengraphImage,
width: 800,
height: 600,
alt: { SITENAME },
},
],
site_name: { SITENAME },
}}
/>
<p>works</p>
</>
);
};
export async function getStaticProps(context) {
const apolloClient = initializeApollo();
await apolloClient.query({
query: gql`
{
project(id: "ca-souls", idType: SLUG) {
seo {
canonical
metaDesc
metaKeywords
metaRobotsNofollow
metaRobotsNoindex
opengraphAuthor
opengraphDescription
opengraphModifiedTime
opengraphPublishedTime
opengraphPublisher
opengraphSiteName
opengraphTitle
opengraphType
opengraphUrl
title
twitterDescription
twitterTitle
}
}
}
`,
});
return {
props: {
initialApolloState: apolloClient.cache.extract(),
context: JSON.stringify(context) || null,
},
revalidate: 1,
};
}
export default Home;
Here is the log result:
How could I get context.query?
The context parameter includes previewData contains the preview data set by setPreviewData. This means including function, therefore, unable to serealize. Take values out from context.params.

How to use Apollo GraphQL subscriptions in the client-side NextJS?

I am new to NextJS. I have a page that needs to display real-time data pulled from a Hasura GraphQL backend.
In other non-NextJS apps, I have used GraphQL subscriptions with the Apollo client library. Under the hood, this uses websockets.
I can get GraphQL working in NextJS when it's not using subscriptions. I'm pretty sure this is running on the server-side:
import React from "react";
import { AppProps } from "next/app";
import withApollo from 'next-with-apollo';
import { ApolloProvider } from '#apollo/react-hooks';
import ApolloClient, { InMemoryCache } from 'apollo-boost';
import { getToken } from "../util/auth";
interface Props extends AppProps {
apollo: any
}
const App: React.FC<Props> = ({ Component, pageProps, apollo }) => (
<ApolloProvider client={apollo}>
<Component {...pageProps}/>
</ApolloProvider>
);
export default withApollo(({ initialState }) => new ApolloClient({
uri: "https://my_hasura_instance.com/v1/graphql",
cache: new InMemoryCache().restore(initialState || {}),
request: (operation: any) => {
const token = getToken();
operation.setContext({
headers: {
authorization: token ? `Bearer ${token}` : ''
}
});
}
}))(App);
And I use it this way:
import { useQuery } from '#apollo/react-hooks';
import { gql } from 'apollo-boost';
const myQuery = gql`
query {
...
}
`;
const MyComponent: React.FC = () => {
const { data } = useQuery(myQuery);
return <p>{JSON.stringify(data)}</p>
}
However, I would instead like to do this:
import { useSubscription } from '#apollo/react-hooks';
import { gql } from 'apollo-boost';
const myQuery = gql`
subscription {
...
}
`;
const MyComponent: React.FC = () => {
const { data } = useSubscription(myQuery);
return <p>{JSON.stringify(data)}</p>
}
What I've tried
I've tried splitting the HttpLink and WebsocketLink elements in the ApolloClient, like so:
import React from "react";
import { AppProps } from "next/app";
import { ApolloProvider } from '#apollo/react-hooks';
import withApollo from 'next-with-apollo';
import { InMemoryCache } from "apollo-cache-inmemory";
import ApolloClient from "apollo-client";
import { split } from 'apollo-link';
import { HttpLink } from 'apollo-link-http';
import { WebSocketLink } from 'apollo-link-ws';
import { getMainDefinition } from 'apollo-utilities';
import { getToken } from "../util/auth";
interface Props extends AppProps {
apollo: any
}
const App: React.FC<Props> = ({ Component, pageProps, apollo }) => (
<ApolloProvider client={apollo}>
<Component {...pageProps}/>
</ApolloProvider>
);
const wsLink = new WebSocketLink({
uri: "wss://my_hasura_instance.com/v1/graphql",
options: {
reconnect: true,
timeout: 10000,
connectionParams: () => ({
headers: {
authorization: getToken() ? `Bearer ${getToken()}` : ""
}
})
},
});
const httpLink = new HttpLink({
uri: "https://hasura-g3uc.onrender.com/v1/graphql",
});
const link = process.browser ? split(
({ query }) => {
const definition = getMainDefinition(query);
return (
definition.kind === 'OperationDefinition' &&
definition.operation === 'subscription'
);
},
wsLink,
httpLink
) : httpLink;
export default withApollo(({ initialState }) => new ApolloClient({
link: link,
cache: new InMemoryCache().restore(initialState || {}),
}))(App);
But when I load the page, I get an Internal Server Error, and this error in the terminal:
Error: Unable to find native implementation, or alternative implementation for WebSocket!
It seems to me that the ApolloClient is then being generated on the server-side, where there is no WebSocket implementation. How can I make this happen on the client-side?
Found workaround to make it work, take look at this answer https://github.com/apollographql/subscriptions-transport-ws/issues/333#issuecomment-359261024
the reason was due to server-side rendering; these statements must run in the browser, so we test if we have process.browser !!
relevant section from the attached github link:
const wsLink = process.browser ? new WebSocketLink({ // if you instantiate in the server, the error will be thrown
uri: `ws://localhost:4000/subscriptions`,
options: {
reconnect: true
}
}) : null;
const httplink = new HttpLink({
uri: 'http://localhost:3000/graphql',
credentials: 'same-origin'
});
const link = process.browser ? split( //only create the split in the browser
// split based on operation type
({ query }) => {
const { kind, operation } = getMainDefinition(query);
return kind === 'OperationDefinition' && operation === 'subscription';
},
wsLink,
httplink,
) : httplink;
This answer seems to be more actual
https://github.com/apollographql/subscriptions-transport-ws/issues/333#issuecomment-775578327
You should install ws by npm i ws and add webSocketImpl: ws to WebSocketLink argument.
import ws from 'ws';
const wsLink = new WebSocketLink({
uri: endpoints.ws,
options: {
reconnect: true,
connectionParams: () => ({
...getToken() && {Authorization: getToken()}
})
},
webSocketImpl: ws
});
Solution: Make wsLink a function variable like the code below.
// src/apollo.ts
import { ApolloClient, HttpLink, InMemoryCache } from "#apollo/client";
import { GraphQLWsLink } from "#apollo/client/link/subscriptions";
import { createClient } from "graphql-ws";
const httpLink = new HttpLink({
uri: 'http://localhost:3000/graphql'
});
const wsLink = () => {
return new GraphQLWsLink(createClient({
url: 'ws://localhost:3000/graphql'
}));
}
export const apolloClient = new ApolloClient({
link: typeof window === 'undefined' ? httpLink : wsLink(),
cache: new InMemoryCache(),
});
// pages/_app.tsx
import { ApolloProvider } from "#apollo/client";
import { apolloClient } from "../src/apollo";
function MyApp({ Component, pageProps }) {
return (
<ApolloProvider client={apolloClient}>
<Component {...pageProps} />
</ApolloProvider>
);
}

apollo client: local state being overwritten by query?

I have an app that uses:
react-apollo
apollo-link-state
apollo-cache-persist
apollo-link-error
I ran into a weird issue when I was trying to add a pollInterval to a query. The pollInterval causes an overWrite of the local cache state back to the defaults. I am not sure if this is caused directly by the pollInterval or not, but I have been troubleshooting the issue for some time with no luck.
I made a reproduction of the issue on Github here (https://github.com/deltaskelta/apollo-link-iss-573) with instructions on how to see what is happening. If anyone has any idea what is going on I would really appreciate it!
Thanks
EDIT: the full code that is causing the error is posted below
import { ApolloClient } from "apollo-client";
import { ApolloLink } from "apollo-link";
import { ApolloProvider, graphql } from "react-apollo";
import { CachePersistor } from "apollo-cache-persist";
import { InMemoryCache } from "apollo-cache-inmemory";
import { onError } from "apollo-link-error";
import { withClientState } from "apollo-link-state";
import PropTypes from "prop-types";
import React, { Component } from "react";
import gql from "graphql-tag";
export const resolvers = {
Mutation: {
setErrors: (_, { messages }, { cache }) => {
const data = {
errors: {
__typename: "Errors",
messages
}
};
cache.writeData({ data });
return null;
}
}
};
// create the cache
const cache = new InMemoryCache();
const persistor = new CachePersistor({
cache,
storage: window.localStorage,
debug: true
});
// link to the local state cache
const stateLink = withClientState({
cache,
resolvers,
defaults: {
errors: {
__typename: "Errors",
messages: []
}
}
});
// link to intercept graphql errors and write them to the cache, this is almost like a
// middleware
const errorLink = onError(({ graphQLErrors, networkError }) => {
var messages = []; // make a place to push all errors to
// go through the network errors and graphql errors, push them to the errors array and
// then write those errors to the cache
if (graphQLErrors) {
graphQLErrors.forEach(({ message, path }) => {
messages.push(`Error: msg: ${message}, path: ${path}`);
});
}
if (networkError) {
messages.push(`Error: network: ${networkError}`);
}
const data = {
errors: {
__typename: "Errors",
messages
}
};
cache.writeData({ data });
});
// put both links in the frontend apollo client
const client = new ApolloClient({
cache,
link: ApolloLink.from([stateLink, errorLink]),
connectToDevTools: true
});
client.onResetStore(stateLink.writeDefaults);
class Persistor extends React.Component {
static propTypes = {
children: PropTypes.object,
persistor: PropTypes.object
};
componentDidMount() {
this.props.persistor.restore().then(() => {
console.log("restored");
});
}
render() {
return this.props.children;
}
}
class App extends Component {
render() {
return (
<ApolloProvider client={client}>
<Persistor persistor={persistor}>
<Errors />
</Persistor>
</ApolloProvider>
);
}
}
const RootComponent = ({ errors }) => {
return (
<div>
Hello World
{errors.map(e => <div>{e}</div>)}
</div>
);
};
RootComponent.propTypes = {
errors: PropTypes.array
};
const Errors = graphql(
gql`
query GetErrors {
errors #client {
messages
}
}
`,
{
props: ({ data }) => ({ errors: data.errors.messages }),
options: {
pollInterval: 1000 * 10
}
}
)(RootComponent);
export default App;
// TODO:
//
// - cause an error that is written to the cache
// - make a query to poll the error

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