Custom Scalar Types

scalar-types.js

const pad = (s) => {
  let str = s + "";
  while (str.length < 2)
     str = "0" + str;
  return str;
}

const flightsDateTime = new GraphQLScalarType({
  name: 'FlightsDateTime',
  description: 'Description of flights dateTime type',
  serialize(value) {
    return `${pad(value.day.low)}.${pad(value.month.low)}.${value.year.low} ${pad(value.hour.low)}:${pad(value.minute.low)}`;
  }
});

const flightsInt = new GraphQLScalarType({
  name: 'FlightsInt',
  description: 'Description of flights int type',
  serialize(value) {
    return value.low;
  }
});

export const resolvers = {
  FlightsInt: flightsInt,
  FlightsDateTime: flightsDateTime,
  Query: { ... }
}
    
export const typeDefs = `
scalar FlightsDateTime
scalar FlightsInt

type FlightDetails {
  departs_local: FlightsDateTime!
  arrival_local: FlightsDateTime!
}

type FlightsSearchResult {
  flights: [FlightInfo] @neo4j_ignore
  route: [RouteInfo] @neo4j_ignore
  stops: FlightsInt! 
}

`;