fix undefined method 'constantize' error

[welitonfreitas]

undefined method `constantize' for #ActiveModel::Name:0x261fd148
Extracted source (around line #6):

<%= f.attribute_fields do |a| %>
  <span class="fields" data-object-name="<%= f.object_name %>">
  <%= a.attribute_select({}, :class => 'ransack_attribute') %>
<% end %>

<%= f.predicate_select({}, :class => 'ransack_predicate') %

[welitonfreitas]

This method has been moved to ActiveSupport::Inflector#constantize on rails 4

[ndbroadbent]

Sorry, I haven't had a chance to look at this project for a long time. No problem if you don't have time, but please feel free to submit a Pull Request that fixes this issue. If you're really interested in the project, I could even add you as a collaborator so that you can help with development and maintenance.

[rchady]

Any update on this?