Including Spree helpers into AlchemyCMS

app-controllers-alchemy-admin-base_controller_decorator.rb

Alchemy::Admin::BaseController.class_eval do
  include Spree::Core::ControllerHelpers
  include Spree::Core::ControllerHelpers::Store
  helper Spree::Core::Engine.helpers

  # it appears spree is overriding alchemy's layout when the helper methods are included
  # in here, we basically "recall" alchemy's original code.
  layout :set_layout

  private

  def set_layout
    request.xhr? ? false : 'alchemy/admin'
  end
end

app-controllers-alchemy-admin-pages_controller_decorator.rb

Alchemy::Admin::PagesController.class_eval do
  # Used by page preview iframe in Page#edit view.
  # decorating to reset the layout of the application
  def show
    @preview_mode = true
    Alchemy::Page.current_preview = @page
    # Setting the locale to pages language, so the page content has it's correct translations.
    ::I18n.locale = @page.language_code
    render layout: 'spree/layouts/spree_application'
  end
end

app-controllers-alchemy-base_controller_decorator.rb

Alchemy::BaseController.class_eval do
  include Spree::Core::ControllerHelpers
  include Spree::Core::ControllerHelpers::Store
  helper Spree::Core::Engine.helpers
end