Created Issue: Delta is not populating GUIDs or INT fields [648]

I'm looking to do partial updates on a web api controller action by using the Delta wrapper.

I have a model like such:

public class Person
{
public Guid PersonId { get; set; }

public string FirstName { get; set; }

public string LastName { get; set; }

public bool IsActive { get; set; }

public int NumVacationDays { get; set; }

public double Salary { get; set; }
}


I have the api controller like such:

public void Put(Delta<Person> person)
{
var p = person.GetEntity();

Person existingPerson = _repository.Get(p.PersonId);

person.Patch(existingPerson);

_repository.Update();

return;
}

I make the call to the web api like such (using fiddler)

url: http://localhost:49933/api/Person (PUT)


Response Body
{
"PersonId": "b269c49f-8a90-41d6-b102-7cfba3812b1c",
"FirstName": "sample string 2",
"LastName": "sample string 3",
"IsActive": true,
"NumVacationDays": 5,
"Salary": 6.1
}

The controller is hit and all the data is populated other than the NumVacationDays (which is 0) and the PersonId (which defaults to 00000000-0000-0000-0000-000000000000)

Does anyone know why the GUIDs and int fields are not populating from the json?