Initializer to tweak auto-generation of partial_path based on rendering objects

partial_path_override.rb

# config/initializers/partial_path_override.rb

# Override possibly undesirable naming convention used by Rails to automatically determine
# the path to partial templates when you pass model objects to the render method
# by Obie Fernandez http://blog.obiefernandez.com/content/2011/05/rending-collections-of-heterogeneous-objects-in-rails-1.html

ActionView::Partials::PartialRenderer.class_eval do

  private

  def partial_path(object = @object)
    @partial_names[object.class.name] ||= begin
      object = object.to_model if object.respond_to?(:to_model)

      object.class.model_name.partial_path.dup.tap do |partial|
        # I chose to limit this hack to events objects in my app's activity stream
        if partial.include?("_events")
          # Example: turns "nomination_events/nomination_event" into "events/nomination_event"
          # More importantly, don't prepend the controller path so that this feature can
          # be used across namespaces and controllers
          partial.gsub!(/\A\w+_/,'')
        else
          path = @view.controller_path
          partial.insert(0, "#{File.dirname(path)}/") if partial.include?(?/) && path.include?(?/)
        end
      end
    end
  end
end