<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.class, :action => 'filterbytype', :id => purchase.type %></td>
<td><%=h purchase.title %></td>
<td><%=h purchase.price %></td>