NonViewComponentAttribute

[ivaylokenov]

Currently if I have the following class in the project:

public class BaseViewComponent
{
    // nothing interesting here, continue reading
}

I will receive an exception from the view component descriptor collection provider that the above class is missing Invoke or InvokeAsync method. I can easily fix the issue by making the class abstract but since there are NonControllerAttribute and NonActionAttribute maybe it will be useful to have NonViewComponentAttribute.

[rynowak]

/cc @Eilon this is probably something it wouldn't hurt to add

[javiercn]

I believe NonViewComponent as described here might introduce an inconsistency with the behavior for NonController. NonController marks everything in the hierarchy as not a controller. I'm not sure what the convention for view components is, but given that BaseViewComponent is being picked up, I tend to think its not compatible with the controller one. This is just something to factor in.

[ryanbrandenburg]

I think @javiercn is right here, we'd want it to behave the same for a hypothetical NonViewComponentAttribute as it does for NonControllerAttribute, so the solution to your problem is, as you said, mark it abstract like we do here. That said I think it's perfectly reasonable to add a NonViewComponentAttribute seeing as it seems to be the pattern.