MVC3: make checkbox required via jQuery validate?

Question

I want my \"Agree To Terms\" checkbox to be mandatory using jQuery validate, in an MVC3 project. I currently get server/client DRY/SPOT validation from \"MS data annotation

Answer 1

Just change your javascript to this:

(function ($) {
    // http://itmeze.com/2010/12/checkbox-has-to-be-checked-with-unobtrusive-jquery-validation-and-asp-net-mvc-3/
    $.validator.unobtrusive.adapters.add("mandatory", function (options) {
        options.rules["required"] = true;
        if (options.message) {
            options.messages["required"] = options.message;
        }                
    });            
} (jQuery));

You do not actually need to write your own adapter though and can just use:

(function ($) {
    $.validator.unobtrusive.adapters.addBool("mandatory", "required");
} (jQuery));