title: Rails simple_form + Bootstrap not working
body: <p>In my Rails project I have bootstrap-sass (3.3.6, 3.3.4.1) installed. I also added <code>@import "bootstrap";</code> to my <code>application.css.scss</code>.</p>
  
  <p>Now I am able to use Bootstrap classes in my project just fine.</p>
  
  <p>Now I want to use Bootstrap by default on all forms. So I added the gem and installed simple_form</p>
  
  <pre><code>rails generate simple_form:install --bootstrap
  </code></pre>
  
  <p>From what I understand this form here should now be displayed with Bootstrap styles, but it doesn't</p>
  
  <pre><code>&lt;section class="content"&gt;
      &lt;div class="box"&gt;
          &lt;div class="box-body"&gt;
  
              &lt;%= simple_form_for :ride, url: order_path do |f| %&gt;
  
              &lt;p&gt;
                  &lt;%= f.label :client %&gt;&lt;br&gt;
                  &lt;%= f.text_field :client %&gt;
              &lt;/p&gt;
  
              &lt;p&gt;
                  &lt;%= f.submit 'Adicionar', :class =&gt; 'btn btn-primary' %&gt;
              &lt;/p&gt;
  
              &lt;% end %&gt;
  
          &lt;/div&gt;
      &lt;/div&gt;
  &lt;/section&gt;
  </code></pre>
  
  <p>The button gets styled since I am adding the classes manually, but the input fields don't. I added the code that wraps this form, just to make sure to be complete.</p>
  
  <p>Anyone an idea on what I am doing wrong?</p>