X-Git-Url: https://git.openstreetmap.org/rails.git/blobdiff_plain/398d5fa3298b7aacea4a9cbddd0c4e5f8a9e6638..db66d47e42bc267670ef00b3b2611b4b53cb40e9:/app/models/way.rb

diff --git a/app/models/way.rb b/app/models/way.rb
index b042be59e..45789dabe 100644
--- a/app/models/way.rb
+++ b/app/models/way.rb
@@ -13,7 +13,7 @@ class Way < ActiveRecord::Base
   has_many :way_tags, :foreign_key => 'id'
 
   has_many :containing_relation_members, :class_name => "RelationMember", :as => :member
-  has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation
+  has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation, :extend => ObjectFinder
 
   def self.from_xml(xml, create=false)
     begin
@@ -235,17 +235,10 @@ class Way < ActiveRecord::Base
 
   # delete a way and it's nodes that aren't part of other ways, with history
   def delete_with_relations_and_nodes_and_history(user)
-    
-    node_ids = self.nodes.collect {|node| node.id }
-    node_ids_not_to_delete = []
-    way_nodes = WayNode.find(:all, :conditions => "node_id in (#{node_ids.join(',')}) and id != #{self.id}")
-    
-    node_ids_not_to_delete = way_nodes.collect {|way_node| way_node.node_id}
-
     node_ids_to_delete = node_ids - node_ids_not_to_delete
 
     # delete the nodes not used by other ways
-    node_ids_to_delete.each do |node_id|
+    self.unshared_node_ids.each do |node_id|
       n = Node.find(node_id)
       n.user_id = user.id
       n.visible = false
@@ -255,7 +248,18 @@ class Way < ActiveRecord::Base
     self.user_id = user.id
 
     self.delete_with_relations_and_history(user)
+  end
+
+  # Find nodes that belong to this way only
+  def unshared_node_ids
+    node_ids = self.nodes.collect { |node| node.id }
+
+    unless node_ids.empty?
+      way_nodes = WayNode.find(:all, :conditions => "node_id in (#{node_ids.join(',')}) and id != #{self.id}")
+      node_ids = node_ids - way_nodes.collect { |way_node| way_node.node_id }
+    end
 
+    return node_ids
   end
 
   # Temporary method to match interface to nodes