I'm having a debate with my coworkers in the design of the read side of a CQRS application.
Option 1: The application read side of my CQRS application returns DTOs, e.g:
public interface IOrderReadService
{
public OrderDto Load(int id);
}
public class SomeController
{
public ActionResult SomeAction(int id)
{
var dto = ObjectFactory.GetInstance<IOrderReadService>().Load(id);
var viewModel = Mapper.Map<OrderDto, SomeViewModel>();
return View(viewModel);
}
}
public class SomeOtherController
{
public ActionResult SomeOtherAction(int id)
{
var dto = ObjectFactory.GetInstance<IOrderReadService>().Load(id);
var viewModel = Mapper.Map<OrderDto, SomeOtherViewModel>();
return View(viewModel);
}
}
Option 2: The application read side returns ViewModels, e.g.:
public interface IOrderReadService
{
public SomeViewModel LoadSomething(int id);
public SomeOtherViewModel LoadSomethingElse(int id);
}
public class SomeController
{
public ActionResult SomeAction(int id)
{
return View(ObjectFactory.GetInstance<IOrderReadService>().LoadSomething(id));
}
}
public class SomeOtherController
{
public ActionResult SomeOtherAction(int id)
{
return View(ObjectFactory.GetInstance<IOrderReadService>().LoadSomethingElse(id));
}
}
From the research my coworkers and I have done on the matter, responses appear mixed - it looks like it really depends on context. So I ask you, my dear StackOverflowians:
Does one approach seem to have clear advantages over the other? If so, what are they?
