Question

When I execute the code below, in address on Mapper.Map line it’s ok I have the right values coming from the model but the customer.Address, an ISet collection, is not updated on session.Save(customer) line. Should be updated since address is a reference.

public ActionResult SaveAddressInvoice(CustomerAddressForView model)
{
    var tx = session.BeginTransaction();

    var customer = session.Get<Customer>(customerId);
    var address = customer.Address.Where(x => x.Id == myAddressId).First<CustomerAddress>();

    address = Mapper.Map<CustomerAddressForView, CustomerAddress>(model);

    session.Save(customer);
    tx.Commit();
}

If I do:

var address = customer.Address.Where(x => x.Id == myAddressId).First<CustomerAddress>();
address.Street = "MyStreet";

I see the entry changed in the collection.

The configuration mapping is:

Mapper.CreateMap<CustomerAddressForView, CustomerAddress>()
    .ForMember(x => x.Id, opt => opt.Ignore());

Any idea?

Update 1

public class Customer
{
    public virtual int Id { get; set; }
    public virtual string LastName { get; set; }
    public virtual Iesi.Collections.Generic.ISet<CustomerAddress> Address { get; set; }

    public Customer()
    {
        Address = new Iesi.Collections.Generic.HashedSet<CustomerAddress>(); 
    }
}

public class CustomerAddress
{
    public virtual int Id { get; set; }
    public virtual string Street { get; set; }
    public virtual Customer Customer { get; set; }
}

Answer 1

The reason why NHibernate isn’t updating the CustomerAddress object referenced by customer.Addresses is because the address variable gets overwritten with a new object in the call to the Mapper.Map method:

address = Mapper.Map<CustomerAddressForView, CustomerAddress>(model);

AutoMapper creates a new CustomerAddress object, which isn’t associated to the retrieved Customer, hence nothing gets updated when you call session.Save().

You need to pass a reference to the retrieved CustomerAddress object to AutoMapper in order to update its properties:

var address = customer.Address
    .Where(x => x.Id == myAddressId)
    .First<CustomerAddress>();
Mapper.Map(model, address); // Updates the existing address