Question

I try to convert the code from haml to erb but I’m getting stuck and don’t know why.

Here is the original code I want to convert: https://github.com/gmarik/simple-backend-example/blob/master/app/views/backend/resource/_index.html.haml

And here is what I have right now. Can someone take a look at it and give me some hints. Thanks.

I doubt this line the most:
%tr[resource]{odd_or_even}

I think that it might be like:
<tr> <% @resource{odd_or_even} %>

RubyMine gave me an error at this line:
<%= paginate collection %>

    <% content_for(:header) do %>
      <h1><%= resource_class.model_name.human(count: 2) %></h1>

    <ul class="tabs">
       <li class="active"><%= link_to "Index", "#" %></li>
       <li><%= link_to "New", new_resource_path %> </li>
    </ul>
    <table class='zebra-striped'>
      <thead>
        <tr>
          <% attributes.each do |attr| %>
            <th> <%= resource_class.human_attribute_name(attr) %></th>
          <th> &nbsp;</th>
        </tr>
      </thead>
      <tbody>
        <% collection.each do |resource| %>
          <tr> <% @resource{odd_or_even} %>
            <% attributes.each do |attr| %>

            <td> <%= resource.public_send(attr).to_s.truncate(20) %> </td>        
            <td class='row-actions'>
              <%= link_to 'show', resource_path(resource) %>
              |
              <%= link_to 'edit', edit_resource_path(resource) %>
              |
              <%= link_to 'destroy', resource_path(resource), method: :delete, confirm: "Are you sure?" %>
            </td>
        <% end %> 
      </tbody> 
    </table>  
    <%= paginate collection %>

Answer 1

Looking at the documentation here : http://haml.info/docs/yardoc/file.REFERENCE.html#object_reference_

I’d say it’s :

<tr id="<%= "#{resource.class.name.underscore}_#{resource.to_key}" %>" class="<%= resource.class.name.underscore %>">

This is to translate %tr[resource].

Now, the {odd_or_even} will just convert the result hash of the helper odd_or_even to map them as attributes on the tr.

If we take a look at the definition of the method here : https://github.com/gmarik/simple-backend-example/blob/master/app/helpers/backend/application_helper.rb

We see it’s just a call to cycle in order to set an extra class. Therefore we end up with:

<tr id="<%= "#{resource.class.name.underscore}_#{resource.to_key}" %>" class="<%= "#{resource.class.name.underscore} #{cycle("odd", "even", name: "rows")}" %>">

Now, all of this won’t fix the problem of paginate. Add the error message if you’re still stuck on this.