Added locking around update and delete methods on main API objects. This should remov...

[rails.git] / app / models / node.rb

diff --git a/app/models/node.rb b/app/models/node.rb
index 2c25bbd14cc72cd268c3c078b92b829c1b8dae87..01b0f220e6ed565a1db167ea265d39f85b670ab2 100644 (file)
--- a/app/models/node.rb
+++ b/app/models/node.rb
@@ -130,14 +130,15 @@ class Node < ActiveRecord::Base
     # provide repeatable reads for the used-by checks. this means it
     # shouldn't be possible to get race conditions.
     Node.transaction do
+      self.lock!
       check_consistency(self, new_node, user)
-      way = WayNode.find(:first, :joins => "INNER JOIN current_ways ON current_ways.id = current_way_nodes.id", 
+      way = WayNode.find(:first, :joins => :way, 
                          :conditions => [ "current_ways.visible = ? AND current_way_nodes.node_id = ?", true, self.id ])
-      raise OSM::APIPreconditionFailedError.new("Node #{self.id} is still used by way #{way.id}.") unless way.nil?
+      raise OSM::APIPreconditionFailedError.new("Node #{self.id} is still used by way #{way.way.id}.") unless way.nil?
       
-      rel = RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", 
+      rel = RelationMember.find(:first, :joins => :relation, 
                                 :conditions => [ "visible = ? AND member_type='Node' and member_id=? ", true, self.id])
-      raise OSM::APIPreconditionFailedError.new("Node #{self.id} is still used by relation #{rel.id}.") unless rel.nil?
+      raise OSM::APIPreconditionFailedError.new("Node #{self.id} is still used by relation #{rel.relation.id}.") unless rel.nil?
 
       self.changeset_id = new_node.changeset_id
       self.visible = false
@@ -150,25 +151,28 @@ class Node < ActiveRecord::Base
   end
 
   def update_from(new_node, user)
-    check_consistency(self, new_node, user)
-
-    # update changeset first
-    self.changeset_id = new_node.changeset_id
-    self.changeset = new_node.changeset
-
-    # update changeset bbox with *old* position first
-    changeset.update_bbox!(bbox);
-
-    # FIXME logic needs to be double checked
-    self.latitude = new_node.latitude 
-    self.longitude = new_node.longitude
-    self.tags = new_node.tags
-    self.visible = true
-
-    # update changeset bbox with *new* position
-    changeset.update_bbox!(bbox);
-
-    save_with_history!
+    Node.transaction do
+      self.lock!
+      check_consistency(self, new_node, user)
+      
+      # update changeset first
+      self.changeset_id = new_node.changeset_id
+      self.changeset = new_node.changeset
+      
+      # update changeset bbox with *old* position first
+      changeset.update_bbox!(bbox);
+      
+      # FIXME logic needs to be double checked
+      self.latitude = new_node.latitude 
+      self.longitude = new_node.longitude
+      self.tags = new_node.tags
+      self.visible = true
+      
+      # update changeset bbox with *new* position
+      changeset.update_bbox!(bbox);
+      
+      save_with_history!
+    end
   end
   
   def create_with_history(user)