prevent update of any object without providing the correct/current

[rails.git] / app / controllers / node_controller.rb

diff --git a/app/controllers/node_controller.rb b/app/controllers/node_controller.rb
index f6a673fe5c3c1767ef6bdc0a2d8b686b2234f945..fa6759c3b5debb59e601a7bd519d401ac352dfd9 100644 (file)
--- a/app/controllers/node_controller.rb
+++ b/app/controllers/node_controller.rb
@@ -15,7 +15,7 @@ class NodeController < ApplicationController
       node = Node.from_xml(request.raw_post, true)
 
       if node
-       node.version = 0
+        node.version = 0
         node.user_id = @user.id
         node.visible = true
         node.save_with_history!
@@ -49,10 +49,14 @@ class NodeController < ApplicationController
     begin
       node = Node.find(params[:id])
       new_node = Node.from_xml(request.raw_post)
+      if new_node.version != node.version
+        render :text => "Version mismatch: Provided " + new_node.version.to_s + ", server had: " + node.version.to_s, :status => :bad_request
+        return
+      end  
 
       if new_node and new_node.id == node.id
-       node.update_from(new_node, @user)
-        render :nothing => true
+        node.update_from(new_node, @user)
+        render :text => node.version.to_s, :content_type => "text/plain"
       else
         render :nothing => true, :status => :bad_request
       end