MVC3 client validation not working

Question

I have a required annotation on my model:

[Required(ErrorMessage = \"Please choose an option\")]
public bool? AnyDebts { get; set; }

I have

Answer 1

are the only required scripts for client validation to work.

And as always here's a full working demo:

Model:

public class MyViewModel
{
    [Required(ErrorMessage = "Please choose an option")]
    public bool? AnyDebts { get; set; }
}

Controller:

public class HomeController : Controller
{
    public ActionResult Index()
    {
        return View(new MyViewModel());
    }

    [HttpPost]
    public ActionResult Index(MyViewModel model)
    {
        return View(model);
    }
}

View:

@model AppName.Models.MyViewModel
@{
    ViewBag.Title = "Home Page";
}


@using (Html.BeginForm())
{
    
Debts
    Yes @Html.RadioButtonFor(x => x.AnyDebts, true)
    No @Html.RadioButtonFor(x => x.AnyDebts, false)

    @Html.ValidationMessageFor(x => x.AnyDebts)
    
}

Remark: I haven't included jquery-1.4.4.js in my view because it is already referenced in the layout.