Add variants_controller from spree_backend so that we can now merge it with the OFN's decorator

app/controllers/spree/admin/variants_controller.rb

@@ -0,0 +1,43 @@
+module Spree
+  module Admin
+    class VariantsController < ResourceController
+      belongs_to 'spree/product', :find_by => :permalink
+      new_action.before :new_before
+
+      # override the destory method to set deleted_at value
+      # instead of actually deleting the product.
+      def destroy
+        @variant = Variant.find(params[:id])
+        if @variant.destroy
+          flash[:success] = Spree.t('notice_messages.variant_deleted')
+        else
+          flash[:success] = Spree.t('notice_messages.variant_not_deleted')
+        end
+
+        respond_with(@variant) do |format|
+          format.html { redirect_to admin_product_variants_url(params[:product_id]) }
+          format.js  { render_js_for_destroy }
+        end
+      end
+
+      protected
+        def new_before
+          @object.attributes = @object.product.master.attributes.except('id', 'created_at', 'deleted_at',
+                                                                        'sku', 'is_master')
+          # Shallow Clone of the default price to populate the price field.
+          @object.default_price = @object.product.master.default_price.clone
+        end
+
+        def collection
+          @deleted = (params.key?(:deleted) && params[:deleted] == "on") ? "checked" : ""
+
+          if @deleted.blank?
+            @collection ||= super
+          else
+            @collection ||= Variant.where(:product_id => parent.id).deleted
+          end
+          @collection
+        end
+    end
+  end
+end