title: How to add an empty attribute in rails form_for tag?
body: <p>To make foundation validations work, I have to add the 'data-abide' attribute to form tag like this :</p>
  
  <pre><code>&lt;form data-abide&gt;
  </code></pre>
  
  <p>How can I do this using the form_for tag in rails?</p>
  
  <p>The full rails code :</p>
  
  <pre><code>&lt;%= form_for @member, html: {class: "custom"} do |f| %&gt;
  </code></pre>