Question

I’m trying to save an object back to the database via WCF, like so (pseudo code):

var Contact = new Contact
{
    Id = Guid.NewGuid(),
    Name = "Test",
    Address = new Address
    {
        Id = Guid.NewGuid(),
        Postcode = "blah"
    }
};

In my model the relationship is 1 to 1 with Contact and Address but doing this fails:

DB.AddToContacts(Contact);
DB.SaveChanges();

Complaining the relationship isn’t met and can’t be empty. So I tried this approach:

DB.AddToContacts(Contact);
DB.AddToAddresses(Contact.Address);
DB.AddRelatedObject(Contact, "Address", Contact.Address);
DB.SaveChanges();

but now I get “AddRelatedObject method only works when the sourceProperty is a collection.”.

My question: how do I save back a related entity easily via WCF?

Answer 1

I finally got it to work by doing this:

DB.AddToAddresses(Client.Address);
DB.AddToClients(Client);

DB.SetLink(Client, "Address", Client.Address);

DB.SaveChanges();

That is 4 individual calls over the wire to the WCF service to add a relational object. At the end of it all I’ll be making 14 calls, eek!