在getServerSideProps函数中访问Apollo客户端的查询功能,需要使用另一种方法而不是在浏览器中使用的常规方法。这是因为getServerSideProps运行在服务器上,而不是在浏览器中。解决这个问题的一种方法是使用GraphQL的fetch功能来访问Apollo客户端的查询功能。以下是一个使用这种方法的示例代码:
import { ApolloClient, ApolloProvider, InMemoryCache, gql } from '@apollo/client';
import { SchemaLink } from '@apollo/client/link/schema';
import { makeExecutableSchema } from '@graphql-tools/schema';
import { useRouter } from 'next/router';
// Defining the executable schema
const typeDefs = `
  type Query {
    hello: String
  }
`;
// Resolving the schema
const resolvers = {
  Query: {
    hello: () => 'world'
  }
};
// Creating the schema
const schema = makeExecutableSchema({ typeDefs, resolvers });
async function getServerSideProps() {
    const client = new ApolloClient({
      ssrMode: true,
      cache: new InMemoryCache(),
      link: new SchemaLink({ schema })
    });
    const { data } = await client.query({
      query: gql`
        query {
          hello
        }
      `
    });
    return {
      props: {
        hello: data.hello
      }
    }
}
function Hello({ hello }) {
  const router = useRouter();
  return (
    
      {hello}
      
    
  );
}
export default function App({ hello }) {
  return (
    
       
     
  );
}
export { getServerSideProps };