Using partials, how do I render `striped` table rows in a DRY way?

Question

So I have some view code that looks like this:

<div class="box-content">
    <table class="table table-properties">
        <tbody>             
            <%= render :partial => 'property', collection: @search.listings, as: :listing %>
        </tbody>
    </table>                                
</div>

In that _property.html.erb , I have this:

<tr>
    <td class="span2">
        <%= link_to listing_path(listing), :class => "thumbnail thumb2" do %>
            <%= image_tag "room_1.jpg", :alt => "Lucas" %>
        <% end %>
    </td>
    <td>
        <h2><%= link_to listing.headline, listing_path(listing) %></h2>
        <h5><%= listing.listing_type.name if listing.listing_type "#{listing.neighborhood.name.capitalize}" %></h5>
        <h5>Maintenance <%= number_to_currency(listing.maintenance) %></h5>
    </td>
    <td class="span1">
        <h2 class="price"><%= number_to_currency(listing.price)%></h2>
        <h5><%= "#{listing.num_bedrooms} bed, #{listing.num_bathrooms} bath" %></h5>
    </td>
</tr>

Basically, I want to generate that above code exactly, for each row, the only difference is I want every 2nd row (ie all even numbered rows) to have the class=striped ..ie <tr class=striped> .

Thoughts on how to do this in a DRY way?

Answer 1

Have you tried using cycle and current_cycle ?

http://api.rubyonrails.org/classes/ActionView/Helpers/TextHelper.html#method-i-cycle

<tr class="<%= cycle('odd', 'even') -%>">
  <!-- etc -->
</tr>

This alternates your classes with odd and even and IMHO should also work when render a collection. If you need the value of the actual cycle multiple times, you get it with current_cycle (because calling cycle multiple times would mess up your cycles, unless you want that).

Answer 2

Won't it be better just to use :nth-child() css selector? http://www.w3schools.com/cssref/sel_nth-child.asp

Answer 3

You can try something like this:

 <tr class="<%=cycle("odd", "even") %>">
    <td class="span2">
        <%= link_to listing_path(listing), :class => "thumbnail thumb2" do %>
            <%= image_tag "room_1.jpg", :alt => "Lucas" %>
        <% end %>
    </td>
    <td>
        <h2><%= link_to listing.headline, listing_path(listing) %></h2>
        <h5><%= listing.listing_type.name if listing.listing_type "#{listing.neighborhood.name.capitalize}" %></h5>
        <h5>Maintenance <%= number_to_currency(listing.maintenance) %></h5>
    </td>
    <td class="span1">
        <h2 class="price"><%= number_to_currency(listing.price)%></h2>
        <h5><%= "#{listing.num_bedrooms} bed, #{listing.num_bathrooms} bath" %></h5>
    </td>
 </tr>

Answer 4

Do it with jquery:

$(document).ready(function(){
   $("table.table-properties > tbody > tr:odd").addClass("odd");
   $("table.table-properties > tbody > tr:not(.odd)").addClass("even");  
});