>>>Hi everybody,
>>>
>>>I am wondering why would our EntityState will always be Detached?
>>>
>>>We're not using the model classes directly in our client part of the application. In our methods we use ModelView and convert model class to a ModelView through AutoMapper and back when sending changes back to the backend.
>>>
>>>Is it what makes the entities detached and so that's why we're manually setting the state to Modified?
>>>
>>>Thanks in advance.
>>
>>Yes. Entities are automatically attached if they are created and returned by the object context - which wouldn't be the case if you are mapping your classes back to an EF entity.
>
>I'm going to do more verification today. In our repository class we normally to entity = _DbSet.GetById() Then we map it to the model and send to the HTML. When get back as a model, convert back to the EF class and update. This is for the single row update.
>
>In my case I get a list of entities as part of an object and send that whole object to the client. I receive back just the list of view models and then convert them to EF model class.
>
>So, I am going to verify if in the first scenario our entities also detached.
>
>In any case, is there another way of checking if the row was changed or not? Would I have to maintain a copy of the original state to compare manually?

Not sure how you'd keep a copy around if your round-tripping to the server. You could always track dirty state in angular and pass that back (or only post back if dirty)?