路线参数，自定义模型活页夹或动作过滤器？

/sites/mysite/
/sites/mysite/settings

/sites/mysite/blog/posts
/sites/mysite/pages/create

private readonly ISiteContext siteContext;
private readonly IRepository<Site> siteRepository;

public SitesController(ISiteContext siteContext, IRepository<Site> siteRepository)
{
    this.siteContext = siteContext;
    this.siteRepository = siteRepository;
}

[HttpGet]
public ActionResult Details(string id)
{
    var site =
        siteRepository.Get(
            s => s.Account == siteContext.Account && s.SystemName == id
        );

    if (site == null)
        return HttpNotFound();

    return Content(\"Viewing details for site \" + site.Name);
}

public object BindModel(ControllerContext controllerContext, ModelBindingContext bindingContext)
{
    if (!controllerContext.RouteData.Values.ContainsKey(\"siteid\"))
        return null;

    var siteId = controllerContext.RouteData.GetRequiredString(\"siteid\");

    var site =
        siteRepository.Get(
            s => s.Account == siteContext.Account && s.SystemName == siteId
        );

    return site;
}

public class ValidateSiteAttribute : ActionFilterAttribute
{       
    public override void OnActionExecuting(ActionExecutingContext filterContext)
    {           
        var site = filterContext.ActionParameters[\"site\"];

        if (site == null || site.GetType() != typeof(Site))
            filterContext.Result = new HttpNotFoundResult();

        base.OnActionExecuting(filterContext);
    }
}

[HttpGet]
[ValidateSite]
public ActionResult Settings(Site site)
{
    var blog = site.GetFeature<BlogFeature>();
    var settings = settingsProvider.GetSettings<BlogSettings>(blog.Id);

    return View(settings);
}

[HttpPost]
[ValidateSite]
[UnitOfWork]
public ActionResult Settings(Site site, BlogSettings settings)
{
    if (ModelState.IsValid)
    {
        var blog = site.GetFeature<BlogFeature>();
        settingsProvider.SaveSettings(settings, blog.Id);
        return RedirectToAction(\"Settings\");
    }

    return View(settings);
}