title: How I can set 'attr_accessible' in order to NOT allow access to ANY of the fields FOR a model using Ruby on Rails?
body: <p>If in a model file I have just this code:</p>
  
  <pre><code>class Users &lt; ActiveRecord::Base
  end
  </code></pre>
  
  <p>what this means? All attributes related to the model are accessible or not?</p>
  
  <p>How I can set 'attr_accessible' in order to <em>not</em> allow access to <em>any</em> of the fields <em>for</em> that model?</p>