I have a collection mapped as a query only property following Ayende's example. My mapping is:
HasMany<Employee>(Reveal.Member<Company>("_employees")).Access.None();
This worked fine, except when I load a Company the foreign key Employee.CompanyId is updated to null. This occurs even if I don't update Company and the generated SQL only includes the CompanyId in the update list even though I have not mapped Employee to update changed properties only.
I tried using NoOp (they're synonyms I think) and declaring the employees collection as a public property instead of a private field. I was finally able to fix it by changing the mapping to:
HasMany(Reveal.Member("_employees")).Access.None().Not.KeyUpdate();
What is the purpose of KeyUpdate and what is the equivalent XML mapping? Why is it needed for a query only property? My assumption was that setting access to none or noop would prevent any changes.