Rails를 사용하여 이번 달 달력에 대한 erb 코드 생성

<% today = Date.today%>
<table>
  <caption><%= today.strftime('%Y年%m月')%></caption>
  <tr>
    <th>月</th>
    <th>火</th>
    <th>水</th>
    <th>木</th>
    <th>金</th>
    <th>土</th>
    <th>日</th>
  </tr>
  <tr>
<% month = today.strftime('%m')%>
<% d = today.at_beginning_of_month.at_beginning_of_week%>
<% 1.upto(5).each do|i|%>
  <tr>
<% (d..d.end_of_week).each do|c|%>
    <th><%= (c.strftime('%m') == month)? c.strftime('%d'): "  "%></th>
<% end %>
  </tr>
<% d = d + 1.week %>
<% end %>
</table>