ASP.NET MVC 3 Remote validation stopped working - asp.net

Question

I'm using the client side validation for my views, and have just created a ViewModel which contains an organisation object and an address object.
I used to have a ViewModel that just mapped to the domain entity. On my domain entity I had the following:
[NotMapped]
[Remote("ValidOrganisation", "Manage", "Organisations", ErrorMessage = "That organisation doesn't exist")]
public string Organisation { get; set; }
However, I have now created a ViewModel for the view that contains the following:
public class PersonModel
{
public Person Person { get; set; }
public AddressModel Address { get; set; }
}
The person object contains the Organisation property.
In my view, I have the following:
<div>
<label for="Organisation">Organisation</label>
<div class="input large">
#Html.TextBoxFor(m => m.Person.Organisation)
<span class="help-block">Type the first letter of the organisation to search</span>
#Html.ValidationMessageFor(m => m.Person.Organisation)
#Html.Hidden("OrganisationID")
</div>
</div>
The only thing that changed was:
#Html.TextBoxFor(m => m.Organisation)
to:
#Html.TextBoxFor(m => m.Person.Organisation)
My remote validation code is:
public JsonResult ValidOrganisation(string organisation)
{
var exists = orgs.SelectAll().Where(o => o.Name.ToLower() == organisation.ToLower()).Count() > 0;
return Json(exists, JsonRequestBehavior.AllowGet);
}
The problem is that NULL is now always being passed in, which is always returning false.
Is this something to do with the Organisation property now changing to be Person.Organisation?

Answer 1

1] Open your view Page Source and see what is Id renderd for the
#Html.TextBoxFor(m => m.Person.Organisation)
2] and rename organisation in method to accept same ID I am expecting it to be Person_Organisation
public JsonResult ValidOrganisation(string organisation)
use below
public JsonResult ValidOrganisation(string Person_Organisation)