title: Rails Simple Form error: No implicit conversion of Symbol into Integer
body: <p>I have a rails 4 app with Simple Form and Bootstrap.</p>
  
  <p>I have a form, which has two fields in it, as follows:</p>
  
  <pre><code> &lt;%= f.input :type, 'What sort of equipment or materials are you seeking?' %&gt;
    &lt;%= f.input :description, 'What are your project requirements for the equipment or materials?' %&gt;
  </code></pre>
  
  <p>When I try to have a look at the form - I get an error which says: 'no implicit conversion of symbol to integer).</p>
  
  <p>I don't have any arrays that seem to be the subject of other people's problems.  Does anyone see what the problem is?</p>
  
  <p>Thank you </p>