ruby on rails - How to add data-attribute to the form tag in simple

i'm using garlic.js validate forms. garlic.js recommends adding data-attribute on form tag.

here's need generate:

<form data-validate="parsley">

i'm having issues generate data attribute on form tag. tried , nothing worked. has solution this?

try this:

<%= simple_form_for @entity, :html => {:"data-validate" => 'parsley'} |f| %>     <!-- inputs --> <% end %>

update

from comment below, have form include html5 data attribute no value try following:

<%= simple_form_for @entity, :html => {:"other-data-value" => ''} |f| %>

by setting attribute empty string form helper renders attribute.

DIs