Proper way to setup AWSAppSyncClient, Apollo & React

Question

I've been having issues getting started with React, Apollo, and AWS-AppSync. I can't resolve this error message:

TypeError: this.currentObservable.query.getCurrentResult is not a function

I'm using the updated packages of @apollo/react-hooks and aws-appsync.

My current setup looks like this.

import React from 'react';
import ReactDOM from 'react-dom';
import './index.css';
import App from './App';
import * as serviceWorker from './serviceWorker';

import config from './aws-exports';
import AWSAppSyncClient from 'aws-appsync';
import { ApolloProvider } from '@apollo/react-hooks';

const client = new AWSAppSyncClient({
    url: config.aws_appsync_graphqlEndpoint,
    region: config.aws_appsync_region,
    auth: {
        type: config.aws_appsync_authenticationType,
        apiKey: config.aws_appsync_apiKey
    }
});

ReactDOM.render(
    <ApolloProvider client={client}>
        <React.StrictMode>
            <App />
        </React.StrictMode>
    </ApolloProvider>,
    document.getElementById('root')
);

And I have a function that makes a query that looks like this:

import React from 'react';
import { useQuery } from '@apollo/react-hooks';
import gql from 'graphql-tag';

const Flavors = () => {

    const GET_FLAVORS = gql`
        query listAll {
            items {
                name,
                image
            }
        }
    `;

    const { loading, error, data } = useQuery(GET_FLAVORS);

    if(loading) return <p>loading...</p>
    if(error) return <p>Something went wrong...</p>

    return (
        <div>
        {
            data.listIceCreamTypes.items.map(type => {
                return <div key={type.name}>
                    <img src={type.image} alt={type.name} />
                    <h1>{type.name}</h1>
                </div>
            })
        }
        </div>
    )
}

export default Flavors;

I've gone through various solutions described in https://github.com/apollographql/react-apollo/issues/3148 such as adding:

"resolutions": {
    "apollo-client": "2.6.3"
 }

to package.json. Then re-running npm install and restarting the server.

Nothing seems to solve my issues.

Edit** Here's a repo to reproduce the problem: https://github.com/Rynebenson/IceCreamQL

Answer 1

I already answered this on other related question here on stackoverflow..

As mentioned in other answer the problem is because aws-appsync is relying in an previous version apollo-client. Using resolutions is not the "cleaner" way to solve this problem as you're fixing a dependency version which is not fully compatible with this library.

I strongly recommend you to create a custom apollo client for AWS AppSync this way:

import { ApolloProvider } from '@apollo/react-hooks';
import { ApolloLink } from 'apollo-link';
import { createAuthLink } from 'aws-appsync-auth-link';
import { createHttpLink } from 'apollo-link-http';
import { AppSyncConfig } from './aws-exports';
import ApolloClient from 'apollo-client';

const url = AppSyncConfig.graphqlEndpoint;
const region = AppSyncConfig.region;
const auth = {
  type: AppSyncConfig.authenticationType,
  apiKey: AppSyncConfig.apiKey
};
const link = ApolloLink.from([
   createAuthLink({ url, region, auth }), 
   createHttpLink({ uri: url })
]);
const client = new ApolloClient({
  link,
  cache: new InMemoryCache()
});

const WithProvider = () => (
  <ApolloProvider client={client}>
    <App />
  </ApolloProvider>
)

export default WithProvider

I also created a more detailed post on medium