X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/6339473cb77e4e0998b959a0835a8f42767f608d..59c69a642ff64111caf8ff4c1dd6e25e7d430b4e:/app/models/way.rb diff --git a/app/models/way.rb b/app/models/way.rb index 1304d8a18..ac4461f8e 100644 --- a/app/models/way.rb +++ b/app/models/way.rb @@ -4,9 +4,6 @@ class Way < ActiveRecord::Base include ConsistencyValidations set_table_name 'current_ways' - - validates_presence_of :changeset_id, :timestamp - validates_inclusion_of :visible, :in => [ true, false ] belongs_to :changeset @@ -20,6 +17,14 @@ class Way < ActiveRecord::Base has_many :containing_relation_members, :class_name => "RelationMember", :as => :member has_many :containing_relations, :class_name => "Relation", :through => :containing_relation_members, :source => :relation, :extend => ObjectFinder + validates_presence_of :id, :on => :update + validates_presence_of :changeset_id,:version, :timestamp + validates_uniqueness_of :id + validates_inclusion_of :visible, :in => [ true, false ] + validates_numericality_of :changeset_id, :version, :integer_only => true + validates_numericality_of :id, :on => :update, :integer_only => true + validates_associated :changeset + def self.from_xml(xml, create=false) begin p = XML::Parser.new @@ -27,10 +32,10 @@ class Way < ActiveRecord::Base doc = p.parse doc.find('//osm/way').each do |pt| - return Way.from_xml_node(pt, create) + return Way.from_xml_node(pt, create) end - rescue - return nil + rescue LibXML::XML::Error => ex + raise OSM::APIBadXMLError.new("way", xml, ex.message) end end @@ -101,7 +106,10 @@ class Way < ActiveRecord::Base user_display_name_cache[self.changeset.user_id] = nil end - el1['user'] = user_display_name_cache[self.changeset.user_id] unless user_display_name_cache[self.changeset.user_id].nil? + if not user_display_name_cache[self.changeset.user_id].nil? + el1['user'] = user_display_name_cache[self.changeset.user_id] + el1['uid'] = self.changeset.user_id.to_s + end # make sure nodes are output in sequence_id order ordered_nodes = [] @@ -113,7 +121,7 @@ class Way < ActiveRecord::Base end else # otherwise, manually go to the db to check things - if nd.node.visible? and nd.node.visible? + if nd.node and nd.node.visible? ordered_nodes[nd.sequence_id] = nd.node_id.to_s end end @@ -174,44 +182,18 @@ class Way < ActiveRecord::Base # duplicate tags are now forbidden, so we can't allow values # in the hash to be overwritten. - raise OSM::APIDuplicateTagsError.new if @tags.include? k + raise OSM::APIDuplicateTagsError.new("way", self.id, k) if @tags.include? k @tags[k] = v end - def save_with_history! - t = Time.now - - Way.transaction do - self.version += 1 - self.timestamp = t - self.save! - - tags = self.tags - WayTag.delete_all(['id = ?', self.id]) - tags.each do |k,v| - tag = WayTag.new - tag.k = k - tag.v = v - tag.id = self.id - tag.save! - end - - nds = self.nds - WayNode.delete_all(['id = ?', self.id]) - sequence = 1 - nds.each do |n| - nd = WayNode.new - nd.id = [self.id, sequence] - nd.node_id = n - nd.save! - sequence += 1 - end - - old_way = OldWay.from_way(self) - old_way.timestamp = t - old_way.save_with_dependencies! - end + ## + # the integer coords (i.e: unscaled) bounding box of the way, assuming + # straight line segments. + def bbox + lons = nodes.collect { |n| n.longitude } + lats = nodes.collect { |n| n.latitude } + [ lons.min, lats.min, lons.max, lats.max ] end def update_from(new_way, user) @@ -238,6 +220,9 @@ class Way < ActiveRecord::Base def preconditions_ok? return false if self.nds.empty? + if self.nds.length > APP_CONFIG['max_number_of_way_nodes'] + raise OSM::APITooManyWayNodesError.new(self.nds.count, APP_CONFIG['max_number_of_way_nodes']) + end self.nds.each do |n| node = Node.find(:first, :conditions => ["id = ?", n]) unless node and node.visible @@ -248,39 +233,46 @@ class Way < ActiveRecord::Base end def delete_with_history!(new_way, user) - check_consistency(self, new_way, user) - if self.visible + unless self.visible + raise OSM::APIAlreadyDeletedError + end + + # need to start the transaction here, so that the database can + # provide repeatable reads for the used-by checks. this means it + # shouldn't be possible to get race conditions. + Way.transaction do + check_consistency(self, new_way, user) if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", - :conditions => [ "visible = 1 AND member_type='way' and member_id=? ", self.id]) + :conditions => [ "visible = ? AND member_type='way' and member_id=? ", true, self.id]) raise OSM::APIPreconditionFailedError else self.changeset_id = new_way.changeset_id self.tags = [] self.nds = [] self.visible = false - self.save_with_history! + save_with_history! end - else - raise OSM::APIAlreadyDeletedError end end - # delete a way and it's nodes that aren't part of other ways, with history + # delete a way and its nodes that aren't part of other ways, with history # FIXME: merge the potlatch code to delete the relations - def delete_with_relations_and_nodes_and_history(user) + # and refactor to use delete_with_history! + def delete_with_relations_and_nodes_and_history(changeset_id) # delete the nodes not used by other ways self.unshared_node_ids.each do |node_id| n = Node.find(node_id) - n.user_id = user.id + n.changeset_id = changeset_id n.visible = false n.save_with_history! end - # FIXME needs more information passed in so that the changeset can be updated - self.user_id = user.id - - self.delete_with_history(user) + self.changeset_id = changeset_id + self.tags = [] + self.nds = [] + self.visible = false + self.save_with_history! end # Find nodes that belong to this way only @@ -299,4 +291,73 @@ class Way < ActiveRecord::Base def tags_as_hash return self.tags end + + ## + # if any referenced nodes are placeholder IDs (i.e: are negative) then + # this calling this method will fix them using the map from placeholders + # to IDs +id_map+. + def fix_placeholders!(id_map) + self.nds.map! do |node_id| + if node_id < 0 + new_id = id_map[:node][node_id] + raise "invalid placeholder for #{node_id.inspect}: #{new_id.inspect}" if new_id.nil? + new_id + else + node_id + end + end + end + + private + + def save_with_history! + t = Time.now + + # update the bounding box, but don't save it as the controller knows the + # lifetime of the change better. note that this has to be done both before + # and after the save, so that nodes from both versions are included in the + # bbox. + changeset.update_bbox!(bbox) unless nodes.empty? + + Way.transaction do + self.version += 1 + self.timestamp = t + self.save! + + tags = self.tags + WayTag.delete_all(['id = ?', self.id]) + tags.each do |k,v| + tag = WayTag.new + tag.k = k + tag.v = v + tag.id = self.id + tag.save! + end + + nds = self.nds + WayNode.delete_all(['id = ?', self.id]) + sequence = 1 + nds.each do |n| + nd = WayNode.new + nd.id = [self.id, sequence] + nd.node_id = n + nd.save! + sequence += 1 + end + + old_way = OldWay.from_way(self) + old_way.timestamp = t + old_way.save_with_dependencies! + + # update and commit the bounding box, now that way nodes + # have been updated and we're in a transaction. + changeset.update_bbox!(bbox) unless nodes.empty? + + # tell the changeset we updated one element only + changeset.add_changes! 1 + + changeset.save! + end + end + end