How-to Render Collections with Partials and Row Highlighting

When performing a rendering operation on a collection, there are several approarches. A popular one to really modularize and DRY out your code is to use partials. Here is how that is done:

The View

<h3 class="head2">Active Investments</h3>
  <% unless @session[:user].active_investments.empty? %>
  <center>
  <table class="formbox"  width="440" cellpadding="5px" cellspacing="0" align="center" style="background-color:#fff">

    <tr style="font-weight:bold;boder-bottom:solid 1px:000;">
      <td>Investment Amount</td>
      <td>Origination Date</td>
      <td>Due Date</td>
      <td>Check #</td>
      <td>Status</td>
    </tr>
    <%= render :partial => "history_item", :collection => @session[:user].active_investments %>
  </table>
  </center>
  <% else -%>
  <p>We were unable to find any active online investments.</p>
  <% end -%>

The Collections Partial

<!-- This bit does highlihting of the rows -->
<tr onmouseover="this.className='row_highlight'" onmouseout="this.className='row'">
  <%= datatable_investment_agreement_cell(history_item, number_to_currency(history_item.amount))%>

  <%= datatable_investment_agreement_cell(history_item, dateformat(history_item.start))%>
  <%= datatable_investment_agreement_cell(history_item, dateformat(history_item.end))%>
  <%= datatable_investment_agreement_cell(history_item, history_item.check_number)%>
  <%= datatable_investment_agreement_cell(history_item, history_item.status)%>
</tr>
<% if history_item.has_renewals? -%>
  <% history_item.renewals.each do |r| -%>
  <tr>
    <td colspan="5" style="text-align:right;font-size:.8em;color:#666;padding-right:30px;"><%= 
number_to_currency(r.new_investment.amount) %> renewal submitted on <%= fancydateformat(r.created_at) 
%></td>
  </tr>
  <% end -%>
<% end -%>