String interpolation trouble with Haml and Spree - ruby-on-rails

Question

I'm trying to convert my Spree store to Haml, and I'm facing some trouble with some parts of the backend.
For instance, I take the following Haml code:
- #orders.each do |order|
%tr{:class => "state-#{order.state.downcase} #{cycle('odd', 'even')}"}
%tr{:class => "state-#{order.state.downcase}"}
And here's the output HTML (simplified to a single iteration):
<tr class="state-#order.state.downcase"></tr>
<tr></tr>
Can someone help me understand why the string interpolation is wrong in both cases? I have been looking at this for hours...

Answer 1

Your HAML syntax looks fine, but it's possible cycle is causing trouble and failing silently. Cycle is a RAILs method within ActionView::Helpers::TextHelper, so perhaps your code no longer is including that library now that you've dropped Spree.
If this is the source of the problem, you could either include the ActionView Helpers or rewrite your code without cycle with something like the following:
%table
%tbody
- #orders.each_with_index do |order,index|
%tr{:class => "state-#{order.state.downcase} #{%w(even odd)[index%2]}"}
%td{:class => "state-#{order.state.downcase}"}
#{order.state}
PS - I'm assuming the second tr in your sample code is supposed to be a td and that you're just providing a fragment of the table.

Answer 2

I have just revisited this and came across the fact that Deface (used by Spree) is not compatible with Haml.
So either one uses ERB and lives with it, or completely disables Deface and rewrite all 'defaced' views.
P.S.: In order to disable Deface, I added config.deface.enabled = false to development.rb, production.rb and test.rb inside config/environments/.