Where we should put validation for domain model
- by adisembiring
I still looking best practice for domain model validation. Is that good to put the validation in constructor of domain model ? my domain model validation example as follows:
public class Order
{
private readonly List<OrderLine> _lineItems;
public virtual Customer Customer { get; private set; }
public virtual DateTime OrderDate { get; private set; }
public virtual decimal OrderTotal { get; private set; }
public Order (Customer customer)
{
if (customer == null)
throw new ArgumentException("Customer name must be defined");
Customer = customer;
OrderDate = DateTime.Now;
_lineItems = new List<LineItem>();
}
public void AddOderLine //....
public IEnumerable<OrderLine> AddOderLine { get {return _lineItems;} }
}
public class OrderLine
{
public virtual Order Order { get; set; }
public virtual Product Product { get; set; }
public virtual int Quantity { get; set; }
public virtual decimal UnitPrice { get; set; }
public OrderLine(Order order, int quantity, Product product)
{
if (order == null)
throw new ArgumentException("Order name must be defined");
if (quantity <= 0)
throw new ArgumentException("Quantity must be greater than zero");
if (product == null)
throw new ArgumentException("Product name must be defined");
Order = order;
Quantity = quantity;
Product = product;
}
}
Thanks for all of your suggestion.
