From 50b3635e7ebcdc80f1a032db4144882937891b6e Mon Sep 17 00:00:00 2001
From: Rob Harrington <oeoeaio@gmail.com>
Date: Fri, 9 Oct 2015 12:50:34 +1100
Subject: [PATCH] Locking line_items on API update

---
 .../spree/api/line_items_controller_decorator.rb       | 10 +++++++++-
 1 file changed, 9 insertions(+), 1 deletion(-)

diff --git a/app/controllers/spree/api/line_items_controller_decorator.rb b/app/controllers/spree/api/line_items_controller_decorator.rb
index 5493c74043..1f6498cc86 100644
--- a/app/controllers/spree/api/line_items_controller_decorator.rb
+++ b/app/controllers/spree/api/line_items_controller_decorator.rb
@@ -1,9 +1,17 @@
 Spree::Api::LineItemsController.class_eval do
   after_filter :apply_enterprise_fees, only: :update
-
+  around_filter :lock, only: :update
 
   private
 
+  def lock
+    authorize! :read, order
+    @line_item = order.line_items.find(params[:id])
+    @line_item.with_lock do
+      yield
+    end
+  end
+
   def apply_enterprise_fees
     authorize! :read, order
     order.update_distribution_charge!