MVC4 client validation not displaying - validation

Question

When I submit my form, The client validation is working, but it is not displaying the error messages for the invalid form fields...
The Model
public class Blog : MainDbContext
{
public int Id { get; set; }
[Display(Name="Author")]
public int Profile { get; set; }
[Required(AllowEmptyStrings = false, ErrorMessage = "Title is required.")]
public string Title { get; set; }
[Required(AllowEmptyStrings = false, ErrorMessage = "At least one Tag is required.")]
public string Tags { get; set; }
}
The ViewModel
public class BlogEditViewModel
{
public BlogEditViewModel(Blog blogItem, IEnumerable<SelectListItem> staffList)
{
this.BlogItem = blogItem;
this.StaffList = staffList;
}
public Blog BlogItem { get; set; }
public IEnumerable<SelectListItem> StaffList { get; private set; }
}
The View
<section>
#Html.LabelFor(model => model.BlogItem.Tags)
#Html.EditorFor(model => Model.BlogItem.Tags, null, "Tags")
#Html.ValidationMessageFor(model => model.BlogItem.Tags)
</Section>
The Layout
<script src="/Scripts/jquery-1.7.1.js" type="text/javascript"></script>
<script src="/Scripts/jquery.unobtrusive-ajax.js" type="text/javascript"></script>
<script src="/Scripts/jquery.validate.js" type="text/javascript"></script>
<script src="/Scripts/jquery.validate.unobtrusive.js" type="text/javascript"></script>
The Output (on form submitted)
<input type="text" value="ok" name="Tags" id="Tags" data-val-required="At least one Tag is required." data-val="true" class="text-box single-line input-validation-error">
<span data-valmsg-replace="true" data-valmsg-for="BlogItem.Tags" class="field-validation-valid"></span>
What i expect is the above Span tag to contain the error message as defined n the Model.
The problem I suspect relates to the naming in the EditorFor, as you can see I use an overload to specify the 'htmlfieldname', as without this the form data fails to map the form fields with the model & fails to save the submitted from data.
If I dont use the overloaded EditorFor, the validation works, but as mentioned above the, the form data fails to map the form fields with the model
how do I get the validation to work?
Thanks
kb

Answer 1

Add this script in your View and client side validation is working fine,
<script src="#Url.Content("~/Script/jquery.validate.min.js")" type="text/javascript"></script>
<script src="#Url.Content("~/Script/jquery.validate.unobtrusive.min.js")" type="text/javascript"></script>
I think issue is you have to remove null, "Tags"
#Html.EditorFor(model => Model.BlogItem.Tags)
or you have to assign null, "Tags" to
#Html.ValidationMessage("Tags")
Ex:
View
#Html.LabelFor(m => m.Name)
#Html.TextBoxFor(m => m.Name, new { Name="asd"})
#Html.ValidationMessage("asd")
Model
public class RegisterModel
{
[Required(ErrorMessage = "Name is required.")]
public string Name { get; set; }
}