first-steps-with-relay-graphql

database.js

export class Ticket extends Object {}

var tickets = [];
(function() {
  var t1 = new Ticket();
  t1.id = '1';
  t1.from = 'CTA';
  t1.via = 'FCO';
  t1.to = 'JFK';
  t1.airports = ['CTA', 'FCO', 'JFK'];

  var t2 = new Ticket();
  t2.id = '2';
  t2.from = 'FCO';
  t2.via = null;
  t2.to = 'JFK';
  t2.airports = ['FCO', 'JFK'];

  var t3 = new Ticket();
  t3.id = '3';
  t3.from = 'FCO';
  t3.via = null;
  t3.to = 'JFK';
  t3.airports = ['MXP', 'CIY'];
  
  tickets.push(t1);
  tickets.push(t2);
  tickets.push(t3);
})();

export function getTicket(id) {
  return tickets.find(t => t.id === id)
}

export function getTickets() {
  return tickets;
}

schema.js

var {nodeInterface, nodeField} = nodeDefinitions(
  (globalId) => {
    var {type, id} = fromGlobalId(globalId);
    if (type === 'Ticket') {
      return getTicket(id);
    } else {
      return null;
    }
  },
  (obj) => {
    if (obj instanceof Ticket) {
      return ticketType;
    } else {
      return null;
    }
  }
);

var ticketType = new GraphQLObjectType({
  name: 'Ticket',
  description: 'A ticket for a flight from A to B',
  fields: () => ({
    id: {
      type: globalIdField('Ticket'),
      description: 'The id of the flight.'
    },
    from: {
      type: GraphQLString,
      description: 'IATA CODE for the departing airport'
    },
    via: {
      type: GraphQLString,
      description: 'IATA CODE for the connection airport'
    },
    to: {
      type: GraphQLString,
      description: 'IATA CODE for the arriving airport'
    },
    airports: {
      type: new GraphQLList(GraphQLString),
      description: 'List of involved airports'
    }
  }),
  interfaces: [nodeInterface],
});