How to get the row numbers when I using render in RoR?

Question

I use this code to generate the td tag format:

<%= render(:partial => "cart_item", :collection => @cart.items) %>

And this is the _cart_item.html.erb:

<tr>
    <td class="column-left"><%=h cart_item.title %></td>
    <td> x <%= cart_item.quantity %></td> 
    <td class="column-right">$ <%= cart_item.price %></td>
</tr>

But I want to know the row number as well. How can I do?

Answer 1

I believe you can use cart_item_counter, though I cannot find any documentation to back this up.