<tr>
<td><%=link_to purchase.date, :action => 'filterbydate', :id => purchase.date %></td>
<td><%=h purchase.quantity %></td>
- <td><%=link_to purchase.type, :action => 'filterbytype', :id => purchase.type %></td>
+ <td><%=link_to purchase.class, :action => 'filterbytype', :id => purchase.type %></td>
<td><%=h purchase.title %></td>
<td><%=h purchase.price %></td>
<td><%=link_to purchase.customer.name, :action => 'filterbycust', :id => purchase.customer_id %></td>