Apollo Server와 Express를 이용한 GraphQL 구현

1. 가장 도움이 되는 예제

https://jason9319.tistory.com/411

Express와 Apollo server를 이용한 GraphQL API 만들기

2. async, await를 이용한 start 함수 작성 및 실행

async function startApolloServer(typeDefs, resolvers){
    const server = new ApolloServer({typeDefs, resolvers})
    const app = express();
    await server.start();
    server.applyMiddleware({app, path: '/graphql'});
    
    app.listen(PORT, () => {
    console.log(`Server is listening on port ${PORT}${server.graphqlPath}`);
})
}

startApolloServer(typeDefs, resolvers);

https://stackoverflow.com/questions/68354656/unhandledpromiserejectionwarning-error-you-must-await-server-start-before

UnhandledPromiseRejectionWarning: Error: You must `await server.start()` before calling `server.applyMiddleware()` at ApolloServ

3. Playground 변경 (Apollo Studio는 HTTPS만 동작 가능하기 때문)

function server() {
    const serverApollo = new ApolloServer({
        typeDefs: typeDefs,
        resolvers: resolvers,
        plugins: [ApolloServerPluginLandingPageGraphQLPlayground()] // this is the most important thing
    })
    serverApollo.listen().then(({ url }) => {
        console.log(`Playground on: ${url}`)
    })
}

https://github.com/apollographql/apollo-server/issues/5341

Bring back playground, no sandbox · Issue #5341 · apollographql/apollo-server

<기타 참고 자료>

https://www.apollographql.com/docs/apollo-server/integrations/middleware/#apollo-server-express

https://koonsland.tistory.com/148

[GraphQL] Apollo Server를 이용한 GraphQL 사용 방법

https://www.daleseo.com/graphql-apollo-server/

Apollo Server를 이용한 초간단 GraphQL 서버 개발