app/views/calendars/schedule/_location_row.html.erb
<ul id="location<%=location.id%>_<%=day%>_events" class="events" style="height:<%= @table_pixels / (@table_height)%>px;">
<li id="location<%=location.id%>_<%=day%>_free_time" style="width:100%;" class="click_to_add_new_shift"></li>
<% unless location_row.compact.empty? %>
<%= render partial: "calendars/schedule/shift", collection: location_row %>
<% end %>
</ul>
<% @location_row += 1 %>