@apollo/client#defaultDataIdFromObject TypeScript Examples

The following examples show how to use @apollo/client#defaultDataIdFromObject. You can vote up the ones you like or vote down the ones you don't like, and go to the original project or source file by following the links above each example. You may check out the related API usage on the sidebar.
Example #1
Source File: client.ts    From Frontend with MIT License 6 votes vote down vote up 
createClient = () => {
  const uri = process.env.GATSBY_GRAPHQL_ENDPOINT;

  const httpLink = createHttpLink({
    uri,
    fetch
  });

  const authToken = hasWindow ? localStorage.getItem('token') : '';

  const authLink = new ApolloLink((operation, forward) => {
    operation.setContext({
      headers: {
        authorization: authToken ? `Bearer ${authToken}` : ''
      }
    });

    return forward(operation);
  });

  const client = new ApolloClient({
    link: authLink.concat(httpLink),
    cache: new InMemoryCache({
      dataIdFromObject: (object) => {
        // eslint-disable-next-line no-underscore-dangle
        switch (object.__typename) {
          case 'Person':
            return object.uid;
          default:
            return defaultDataIdFromObject(object); // fall back to default handling
        }
      }
    })
  });

  return client;
}