title: How to send to the controller a parameter value like `params[:user][:delete]` using a `check_box_tag`?
body: <p>I am using Ruby on Rails 3 and I am tring to send to the controller a parameter value like <code>params[:user][:delete]</code> using a <code>check_box_tag</code>.</p>
  
  <p><em>At this time</em> in my form I have:</p>
  
  <pre><code>&lt;%= form_for @user do |f| %&gt;
    &lt;%= f.text_fiels :name %&gt;
    ...
    &lt;%= check_box_tag(:delete, nil, false) %&gt;
  
    &lt;%= f.submit %&gt;
  &lt;% end %&gt;
  </code></pre>
  
  <p>that send the <code>params[:user]</code> (the user hash) and <code>params[:delete]</code>.</p>
  
  <p><em>I would like to</em> have <code>params[:user][:delete]</code> instead of <code>params[:delete]</code>. <strong>How to change the <code>check_box_tag</code> arguments to do that</strong>?</p>