public ParkType(ParkService parkService)
{
_parkService = parkService;
Name = "Park";
Field(d => d.Id).Description("The id of the park.");
Field(d => d.Name).Description("The name of the park.");
Field(d => d.Location, true);
Field(d => d.OpeningHours, true);
Field(d => d.ClosingHours, true);
Field(d => d.Logo, true);
Field <ListGraphType <RideType>, List <Ride> >()
.Name("rides").ResolveAsync(ctx => _parkService.GetRidesByParkId(ctx.Source.Id));
}