BaseController does not attempt to merge incomplete and current orders when they have differing distributors

app/controllers/spree/base_controller_decorator.rb

@@ -0,0 +1,20 @@
+module Spree
+  BaseController.class_eval do
+
+    # Override definition in spree/auth/app/controllers/spree/base_controller_decorator.rb
+    # Do not attempt to merge incomplete and current orders when they have differing distributors
+    def set_current_order
+      if current_user
+        if current_user.respond_to?(:last_incomplete_order)
+          last_incomplete_order = current_user.last_incomplete_order
+          if session[:order_id].nil? && last_incomplete_order
+            session[:order_id] = last_incomplete_order.id
+          elsif current_order && last_incomplete_order && current_order != last_incomplete_order &&
+              (current_order.distributor.nil? || current_order.distributor == last_incomplete_order.distributor)
+            current_order.merge!(last_incomplete_order)
+          end
+        end
+      end
+    end
+  end
+end

spec/controllers/home_controller_spec.rb

@@ -25,4 +25,22 @@ describe Spree::HomeController do
     assigns(:products_local).should == [p1]
     assigns(:products_remote).should == [p2]
   end
+
+  context "BaseController: merging incomplete orders" do
+    it "does not attempt to merge incomplete and current orders when they have differing distributors" do
+      incomplete_order = double(:order, distributor: 1)
+      current_order = double(:order, distributor: 2)
+
+      user = double(:user, last_incomplete_order: incomplete_order)
+      controller.stub(:current_user).and_return(user)
+      controller.stub(:current_order).and_return(current_order)
+
+      incomplete_order.should_receive(:merge!).never
+      current_order.should_receive(:merge!).never
+
+      session[:order_id] = 123
+
+      spree_get :index
+    end
+  end
 end