title: Custom form in Active Admin
body: <p>I am creating a custom form in Active Admin 0.5. I have registered a page and created a form through the DSL:</p>
  
  <pre><code>ActiveAdmin.register_page 'Planning', :namespace =&gt; :pos_admin do
  
    content :title =&gt; proc{ I18n.t("active_admin.dashboard") } do
  
      form do |f|
        f.input :type =&gt; :text
        f.input :type =&gt; :submit
      end
  
    end
  end
  </code></pre>
  
  <p>The problem is that when submitting the form I get an empty Params hash. And the form tag contains no authenticity token. </p>
  
  <p>What am I doing wrong?</p>