title: date_field_tag, how i set up a default date? [Ruby on rails]
body: <p>I wanted to set a default date, the actual date for example, how i set it up?</p>
  
  <p><code>&lt;%= date_field_tag(:datetime_ida, value = nil, options = {})%&gt;</code></p>
  
  <p>Also how can i set up a default value in a combo box</p>
  
  <pre><code>&lt;%= select_tag :children_quantity, options_for_select([['0 Children', 0], ['1 Children', 1], ['2 Children', 2], ['3 Children', 3], ['4 Children', 4], ['5 Children', 5]], 1) %&gt;
  </code></pre>
  
  <p>and by the way, what's the difference between date_field_tag and the date_field?</p>