X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/f04211b1722e27037b305b58479157b5a492f30a..c7061991e74a20cc0576a3afa269821a87178f77:/app/models/way.rb

diff --git a/app/models/way.rb b/app/models/way.rb
index 34e568e4a..0f9650760 100644
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -163,7 +163,7 @@ class Way < ActiveRecord::Base
 
   def update_from(new_way, user)
     Way.transaction do
-      self.lock!
+      lock!
       check_consistency(self, new_way, user)
       unless new_way.preconditions_ok?(nds)
         fail OSM::APIPreconditionFailedError.new("Cannot update way #{id}: data is invalid.")
@@ -180,7 +180,7 @@ class Way < ActiveRecord::Base
 
   def create_with_history(user)
     check_create_consistency(self, user)
-    unless self.preconditions_ok?
+    unless preconditions_ok?
       fail OSM::APIPreconditionFailedError.new("Cannot create way: data is invalid.")
     end
     self.version = 0
@@ -199,7 +199,9 @@ class Way < ActiveRecord::Base
     new_nds = (nds - old_nodes).sort.uniq
 
     unless new_nds.empty?
-      db_nds = Node.where(:id => new_nds, :visible => true)
+      # NOTE: nodes are locked here to ensure they can't be deleted before
+      # the current transaction commits.
+      db_nds = Node.where(:id => new_nds, :visible => true).lock("for share")
 
       if db_nds.length < new_nds.length
         missing = new_nds - db_nds.collect(&:id)
@@ -217,7 +219,7 @@ class Way < ActiveRecord::Base
     # provide repeatable reads for the used-by checks. this means it
     # shouldn't be possible to get race conditions.
     Way.transaction do
-      self.lock!
+      lock!
       check_consistency(self, new_way, user)
       rels = Relation.joins(:relation_members).where(:visible => true, :current_relation_members => { :member_type => "Way", :member_id => id }).order(:id)
       fail OSM::APIPreconditionFailedError.new("Way #{id} is still used by relations #{rels.collect(&:id).join(",")}.") unless rels.empty?
@@ -263,7 +265,7 @@ class Way < ActiveRecord::Base
     Way.transaction do
       self.version += 1
       self.timestamp = t
-      self.save!
+      save!
 
       tags = self.tags
       WayTag.delete_all(:way_id => id)