jQuery Validation - form.valid() always returning true

Question

I have a situation when I try to check if a form is valid, but form.valid() always returns true. But if I try to validate the individual control, it returns false.

This is my form:

<div class="profilestagsedit">
    @using (Html.BeginForm("", "", FormMethod.Post, new { id = "tagsform" }))
    {
        @Html.ValidationMessageFor(x => x.EditTagsText)
        @Html.TextBoxFor(p => p.EditTagsText, new
           {
               @id = "txtprofileedittags"
           })
    }
</div>

This is my viewmodel:

[Required(AllowEmptyStrings = false, ErrorMessage = "Please enter at least one Tag ")]
public string EditTagsText { get; set; }

This is the jQuery code:

   $('#tagsform').removeData("validator");
   $('#tagsform').removeData("unobtrusiveValidation");
   $.validator.unobtrusive.parse('#tagsform');
   $('#tagsform').validate();

And on the save button click:

var isValid = $('#tagsform').validate().element($('#txtprofileedittags')); <-- false
$('#tagsform').valid() true <--

I would like the form.valid() return false as well, what am I doing wrong?

Answer 1

The question already has an accepted answer, but I believe that I've found more specific answer. I have found that if the FIRST validated element in the form has a 'name' tag then everything works as you would expect (that is, .valid() will return false if the form is invalid). The accepted answer conveniently included a 'name' tag and thus it worked.

In normal forms, you definitely need name tags because that's what's used when the data gets submitted to the server. But in more modern environments, such as those using Knockout, there's no reason to have a 'name' tag, because the data-binding works to keep your data model updated.