Our repository method for counting customer bookings

count_customer_bookings.go

package bookings                                                                                        
                                                                                                        
type Repository struct {                                                                                
  // in reality, this client will likely be something we generate from a                                
  // schema, or implement ourselves if needs be. Its not discussed here for                             
  // conciseness                                                                                        
  client bookingsServiceClient                                                                          
}                                                                                                       
                                                                                                        
type booking struct {                                                                                   
  ID uint `json:"id"`                                                                                   
}                                                                                                       
                                                                                                     
func (r *Repository) CountCustomerBookings(customerID uint) (uint, error) {                             
  // we make a request to the bookings service here. This is done in pseudocode                      
  // so as not to get bogged down in the details.                                                    
  bookings, err := r.client.GetCustomerBookings(customerID)                                          
                                                                                                     
  var numBookings uint = len(bookings)                                                               
  return numBookings, err                                                                            
}