+ def save_with_dependencies!
+
+ # dont touch this unless you really have figured out why it's called
+ # (Rails doesn't deal well with the old ways table (called 'ways') because
+ # it doesn't have a unique key. It knows how to insert and auto_increment
+ # id and get it back but we have that and we want to get the 'version' back
+ # we could add another column but thats a lot of data. No, set_primary_key
+ # doesn't work either.
+ save!
+ clear_aggregation_cache
+ clear_association_cache
+ @attributes.update(OldWay.find(:first, :conditions => ['id = ? AND timestamp = ?', self.id, self.timestamp]).instance_variable_get('@attributes'))
+
+ # ok, you can touch from here on
+
+ self.tags.each do |k,v|
+ tag = OldWayTag.new
+ tag.k = k
+ tag.v = v
+ tag.id = self.id
+ tag.version = self.version
+ tag.save!
+ end
+
+ sequence = 1
+ self.nds.each do |n|
+ nd = OldWayNode.new
+ nd.id = [self.id, self.version, sequence]
+ nd.node_id = n
+ nd.save!
+ sequence += 1
+ end
+ end
+
+ def nds
+ unless @nds
+ @nds = Array.new
+ OldWayNode.find(:all, :conditions => ["id = ? AND version = ?", self.id, self.version], :order => "sequence_id").each do |nd|
+ @nds += [nd.node_id]
+ end
+ end
+ @nds
+ end
+
+ def tags
+ unless @tags
+ @tags = Hash.new
+ OldWayTag.find(:all, :conditions => ["id = ? AND version = ?", self.id, self.version]).each do |tag|
+ @tags[tag.k] = tag.v
+ end
+ end
+ @tags = Hash.new unless @tags
+ @tags
+ end
+
+ def nds=(s)
+ @nds = s
+ end
+
+ def tags=(t)
+ @tags = t
+ end
+
+# has_many :way_nodes, :class_name => 'OldWayNode', :foreign_key => 'id'
+# has_many :way_tags, :class_name => 'OldWayTag', :foreign_key => 'id'
+
+ def old_nodes
+ OldWayNode.find(:all, :conditions => ['id = ? AND version = ?', self.id, self.version])
+ end
+
+ def old_tags
+ OldWayTag.find(:all, :conditions => ['id = ? AND version = ?', self.id, self.version])
+ end
+
+ def to_xml_node
+ el1 = XML::Node.new 'way'
+ el1['id'] = self.id.to_s
+ el1['visible'] = self.visible.to_s
+ el1['timestamp'] = self.timestamp.xmlschema
+ el1['user'] = self.user.display_name if self.user.data_public?
+
+ self.old_nodes.each do |nd| # FIXME need to make sure they come back in the right order
+ e = XML::Node.new 'nd'
+ e['ref'] = nd.node_id.to_s
+ el1 << e
+ end
+
+ self.old_tags.each do |tag|
+ e = XML::Node.new 'tag'
+ e['k'] = tag.k
+ e['v'] = tag.v
+ el1 << e
+ end
+ return el1
+ end