title: Ruby on Rails: simple_form + Twitter Bootstrap not showing up
body: <p>I'm creating a simple sign_up form for new users on my site. I have ran the install for simple_form bootstrap...</p>
  
  <pre><code>rails g simple_form:install --bootstrap
  </code></pre>
  
  <p>However, it's still not showing up and rendering as a normal simple_form.</p>
  
  <p>Here is my form code:</p>
  
  <pre><code>&lt;h2&gt;Sign up&lt;/h2&gt;
  
  &lt;%= simple_form_for(resource, :as =&gt; resource_name, :url =&gt; registration_path(resource_name ), :html =&gt; {:class =&gt; 'form-horizontal' }) do |f| %&gt;
    &lt;%= f.error_notification %&gt;
  
  
      &lt;%= f.input :username, :required =&gt; true, class: "form-control"%&gt;
      &lt;%= f.input :first_name, :required =&gt; true, class: "form-control" %&gt;
      &lt;%= f.input :last_name, :required =&gt; true, class: "form-control" %&gt;
      &lt;%= f.input :twitter, class: "form-control", type: "text", placeholder: "Username" %&gt;
      &lt;%= f.input :bio, class: "form-control" %&gt;
      &lt;%= f.input :email, :required =&gt; true, :autofocus =&gt; true, class: "form-control" %&gt;
  
    &lt;div class="form-actions"&gt;
      &lt;%= f.button :submit, "Sign up", class: "btn btn-primary btn-sm" %&gt;
    &lt;/div&gt;
  &lt;% end %&gt;
  
  &lt;%= render "devise/shared/links" %&gt;
  </code></pre>
  
  <p>Not sure what I'm doing wrong here. Thanks in advance.</p>