To implement cache.writeQuery while using next and apollo-server for SSR, you can follow these steps:
In your Next.js application, create a new file named apolloClient.js
. Here, you will define your Apollo client and set up the cache.
Import InMemoryCache
from apollo-cache-inmemory
and ApolloClient
from apollo-client
.
Create a new instance of InMemoryCache
and pass it as an argument to the ApolloClient
constructor.
Define uri
for your Apollo server, which will be used to create the HttpLink
for the client.
Pass the cache
and link
to the ApolloClient
constructor, and export the ApolloClient
instance.
Example code for apolloClient.js
:
import { InMemoryCache } from 'apollo-cache-inmemory';
import { ApolloClient } from 'apollo-client';
import { HttpLink } from 'apollo-link-http';
const cache = new InMemoryCache();
const link = new HttpLink({
uri: 'http://localhost:4000/graphql', // replace with your server URL
});
export const apolloClient = new ApolloClient({
cache,
link,
});
Import the apolloClient
instance into your Next.js pages where you want to fetch data with Apollo.
In your component's getInitialProps
method, use the apolloClient
to fetch data.
Example code for a page that fetches data with Apollo and writes to the cache using cache.writeQuery
:
import { gql } from 'apollo-boost';
import { apolloClient } from '../apolloClient';
const MY_QUERY = gql`
query MyQuery {
myData {
id
name
}
}
`;
const MyPage = ({ data }) => (
<div>
<h1>{data.name}</h1>
<p>ID: {data.id}</p>
</div>
);
MyPage.getInitialProps = async () => {
const { data } = await apolloClient.query({ query: MY_QUERY });
apolloClient.writeQuery({
query: MY_QUERY,
data,
});
return { data: data.myData };
};
export default MyPage;
In this example, the getInitialProps
method calls apolloClient.query
to fetch data from the server. After the data is received, cache.writeQuery
is called to write the data to the cache. Finally, the data
object is returned as a prop to the component.
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Asked: 2021-12-10 11:00:00 +0000
Seen: 6 times
Last updated: Dec 04 '21
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