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
# 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
+ node_ids_to_delete = self.unique_nodes
# delete the nodes not used by other ways
node_ids_to_delete.each do |node_id|
end
+ # Find nodes that belong to this way only
+ def unique_nodes
+ node_ids = self.nodes.collect {|node| node.id }
+ if node_ids.length==0 then return [] end
+ node_ids_in_other_ways = []
+ way_nodes = WayNode.find(:all, :conditions => "node_id in (#{node_ids.join(',')}) and id != #{self.id}")
+ node_ids_in_other_ways = way_nodes.collect {|way_node| way_node.node_id}
+ return node_ids - node_ids_in_other_ways
+ end
+
# Temporary method to match interface to nodes
def tags_as_hash
return self.tags