Apollo Client - 2.5.0 Announcement Post - Resolve from API

apollo-client-250-resolve-api.js

const client = new ApolloClient({
  // ...
  resolvers: {
    RentalCar: {
      numberAvailable(car) => {
        // Call into a separate car inventory tracking system, 
        // to get up to date car availibility.
        return CarTracker.isCarAvailable(car.id);
      },
    },
  },
});

// Query that when run will pull car details from the 
// network, along with up to date car availibility 
// calculated by the numberAvailable local resolver.
const RENTAL_CARS = gql`
  query {
    rentalCar {
      id
      make
      model
      year
      numberAvailable @client
    }
  }
`;