The get_customer.go File

get_customer.go

package customers                                                                                       
                                                                                                        
import "github.com/example/go-abstractions/entities"                                                    
                                                                                                        
// representation of a fictional database customer.                                                     
type customerData struct {                                                                              
  ID        uint   `db:"id"`                                                                            
  FirstName string `db:"name"`                                                                          
  Postcode  string `db:"postcode"`                                                                      
}                                                                                                    
                                                                                                        
func (r *Repository) GetCustomer(customerID uint) (entities.Customer, error) {                          
  customerData, err := r.somethingToAccessTheDB.GetCustomer(customerID)                                 
                                                                                                        
  return entities.Customer{                                                                             
    ID:        customerData.ID,                                                                         
    FirstName: customerData.FirstName,                                                               
    Postcode:  customerData.Postcode,                                                                
  }, nil                                                                                             
}