_form.html.erb

<table class="generic">
  <tr>
    <td align="right" class="list"><strong>Event:</strong></td>
    <td class="list"><%= select :timecard_entry, :eventdate_id_and_eventpart, options_for_select(eventdate_select_options(@eventdates_and_parts)) %></td>
  </tr>
  <tr>
    <td align="right" class="list"><strong>Hours:</strong></td>
    <td class="list"><%= number_field :timecard_entry, :hours, step: 0.25 %></td>
  </tr>
  <tr>
    <td align="right" class="list"><strong>Timecard:</strong></td>
    <td class="list"><% if @timecards.size > 1 -%>
        <%= select :timecard_entry, :timecard_id, options_for_select(timecard_select_options(@timecards)) -%>
        <span id="timecard-single-display" style="display:none;"></span>
        <%= hidden_field_tag 'timecard_entry[timecard_id]', '', id: 'timecard_id_single', disabled: true %>
        <span id="timecard-no-match-message" style="display:none;">No open timecard covers this event (this is not supposed to happen - you should probably share this in #tracker-dev)</span>
        <%- elsif @timecards.size == 1 -%>
        <%= @timecards[0].billing_date.strftime("%Y/%m/%d") -%>
        <%= hidden_field :timecard_entry, :timecard_id, :value => @timecards[0].id -%>
        <%- else -%>
        No timecards are currently open
        <%- end %></td>
  </tr>
</table>