ELMAH and API controller in MVC4 not logging errors

http://stackoverflow.com/questions/10059563/elmah-and-api-controller-in-mvc4-not-logging-errors

The anwser described before doesn't work. I've tried on my test server and received an error ("The given filter instance must implement one or more of the following filter interfaces: IAuthorizationFilter, IActionFilter, IResultFilter, IExceptionFilter.")

Then I realized what happened .... you are trying to add the custom filter to the MVC Global Filter (filters.Add(new ElmahHandledErrorLoggerFilter());)

To fix that, I've split the filter registration in GlobalFilter and HttpFilter

FilterConfig.cs

    public static void RegisterGlobalFilters(GlobalFilterCollection filters)
    {
        filters.Add(new HandleErrorAttribute());
    }

    public static void RegisterHttpFilters(HttpFilterCollection filters)
    {
        filters.Add(new ElmahHandledErrorLoggerFilter());
    }

public class ElmahHandledErrorLoggerFilter : ExceptionFilterAttribute
{
    public override void OnException(HttpActionExecutedContext actionExecutedContext)
    {
        base.OnException(actionExecutedContext);

        ErrorSignal.FromCurrentContext().Raise(actionExecutedContext.Exception);
    }
}

Global.asax

    FilterConfig.RegisterGlobalFilters(GlobalFilters.Filters);
    FilterConfig.RegisterHttpFilters(GlobalConfiguration.Configuration.Filters);