title: Field named value in Rails
body: <p>I'm using 'rails-settings-cached' gem and I want to add ability of creating/updating settings in backend. Model has fields: 'var', 'value', etc... As form builder I'm using Formtastic-bootstrap.
  When I doing <code>f.input :value</code> I get <code>no implicit conversion of nil into String</code>. I think that the reason is that 'value' is a keyword.
  How can I solve my problem?
  Thank you!</p>
  
  <p>UPD: </p>
  
  <pre><code>&lt;%= semantic_form_for [:admin, @setting], :html =&gt; {:class =&gt; "form-horizontal"} do |f| %&gt;
  &lt;%= f.semantic_errors :var, :value%&gt;
  &lt;%= f.inputs do %&gt;
      &lt;%= f.input :var %&gt;
      &lt;%= f.input :value, :as =&gt; :text %&gt;
  &lt;% end %&gt;
  &lt;%= f.actions :class =&gt; 'form-group' do %&gt;
      &lt;div class="col-lg-offset-2 col-lg-8"&gt;
        &lt;%= f.action :submit %&gt;
        &lt;%= f.action :cancel %&gt;
      &lt;/div&gt;
  &lt;% end %&gt;
  </code></pre>