public string GetOrderHistoryByCustomer(int id)
{
// This method is called because we need the information on the whole catalog
// Since the catalog is small I went with this implementation.
// If it was much large I would only fill the library with the relevant books
FillBookLibrary();
// Attempt to find the customer
CustomerEntity dbCustomer = _context.Customers
.Include(o => o.Orders)
.ThenInclude(ol => ol.Orderlines)
.FirstOrDefault(c => c.Id == id);
// If the customer was not found then let the user know
if (dbCustomer == null)
{
return("No Customer exists by this name.");
}
string result = "";
// if one was found then map it to a usable object
Library.Models.Customer m_customer = Mapper_Customer.MapCustomerWithOrders(dbCustomer);
// Build the string that needs to be returned
result += m_customer;
foreach (Library.Models.Order order in m_customer.Orders)
{
result += $"\n{order}";
}
return(result);
}
