X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/34381e56b7df8478a63403f3244571108cb6e161..7bf44e6870ba3448080a5453a43799562174ae48:/app/models/way.rb diff --git a/app/models/way.rb b/app/models/way.rb index d37fb1533..cc9343e7c 100644 --- a/app/models/way.rb +++ b/app/models/way.rb @@ -25,6 +25,7 @@ class Way < ActiveRecord::Base validates_numericality_of :id, :on => :update, :integer_only => true validates_associated :changeset + # Read in xml as text and return it's Way object representation def self.from_xml(xml, create=false) begin p = XML::Parser.string(xml) @@ -33,6 +34,7 @@ class Way < ActiveRecord::Base doc.find('//osm/way').each do |pt| return Way.from_xml_node(pt, create) end + raise OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/way element.") rescue LibXML::XML::Error, ArgumentError => ex raise OSM::APIBadXMLError.new("way", xml, ex.message) end @@ -41,27 +43,27 @@ class Way < ActiveRecord::Base def self.from_xml_node(pt, create=false) way = Way.new - if !create and pt['id'] != '0' - way.id = pt['id'].to_i - end - + raise OSM::APIBadXMLError.new("way", pt, "Version is required when updating") unless create or not pt['version'].nil? way.version = pt['version'] - raise OSM::APIBadXMLError.new("node", pt, "Changeset is required") if pt['changeset'].nil? + raise OSM::APIBadXMLError.new("way", pt, "Changeset id is missing") if pt['changeset'].nil? way.changeset_id = pt['changeset'] - # This next section isn't required for the create, update, or delete of ways - if create - way.timestamp = Time.now.getutc - way.visible = true - else - if pt['timestamp'] - way.timestamp = Time.parse(pt['timestamp']) - end - # if visible isn't present then it defaults to true - way.visible = (pt['visible'] or true) + unless create + raise OSM::APIBadXMLError.new("way", pt, "ID is required when updating") if pt['id'].nil? + way.id = pt['id'].to_i + # .to_i will return 0 if there is no number that can be parsed. + # We want to make sure that there is no id with zero anyway + raise OSM::APIBadUserInput.new("ID of way cannot be zero when updating.") if way.id == 0 end + # We don't care about the timestamp nor the visibility as these are either + # set explicitly or implicit in the action. The visibility is set to true, + # and manually set to false before the actual delete. + way.visible = true + pt.find('tag').each do |tag| + raise OSM::APIBadXMLError.new("way", pt, "tag is missing key") if tag['k'].nil? + raise OSM::APIBadXMLError.new("way", pt, "tag is missing value") if tag['v'].nil? way.add_tag_keyval(tag['k'], tag['v']) end @@ -204,17 +206,20 @@ class Way < ActiveRecord::Base end def update_from(new_way, user) - check_consistency(self, new_way, user) - unless new_way.preconditions_ok? - raise OSM::APIPreconditionFailedError.new("Cannot update way #{self.id}: data is invalid.") + Way.transaction do + self.lock! + check_consistency(self, new_way, user) + unless new_way.preconditions_ok?(self.nds) + raise OSM::APIPreconditionFailedError.new("Cannot update way #{self.id}: data is invalid.") + end + + self.changeset_id = new_way.changeset_id + self.changeset = new_way.changeset + self.tags = new_way.tags + self.nds = new_way.nds + self.visible = true + save_with_history! end - - self.changeset_id = new_way.changeset_id - self.changeset = new_way.changeset - self.tags = new_way.tags - self.nds = new_way.nds - self.visible = true - save_with_history! end def create_with_history(user) @@ -227,17 +232,25 @@ class Way < ActiveRecord::Base save_with_history! end - def preconditions_ok? + def preconditions_ok?(old_nodes = []) return false if self.nds.empty? - if self.nds.length > APP_CONFIG['max_number_of_way_nodes'] - raise OSM::APITooManyWayNodesError.new(self.nds.length, APP_CONFIG['max_number_of_way_nodes']) + if self.nds.length > MAX_NUMBER_OF_WAY_NODES + raise OSM::APITooManyWayNodesError.new(self.id, self.nds.length, MAX_NUMBER_OF_WAY_NODES) end - self.nds.each do |n| - node = Node.find(:first, :conditions => ["id = ?", n]) - unless node and node.visible - raise OSM::APIPreconditionFailedError.new("The node with id #{n} either does not exist, or is not visible") + + # check only the new nodes, for efficiency - old nodes having been checked last time and can't + # be deleted when they're in-use. + new_nds = (self.nds - old_nodes).sort.uniq + + unless new_nds.empty? + db_nds = Node.find(:all, :conditions => { :id => new_nds, :visible => true }) + + if db_nds.length < new_nds.length + missing = new_nds - db_nds.collect { |n| n.id } + raise OSM::APIPreconditionFailedError.new("Way #{self.id} requires the nodes with id in (#{missing.join(',')}), which either do not exist, or are not visible.") end end + return true end @@ -250,19 +263,19 @@ 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! check_consistency(self, new_way, user) - if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", + rel = RelationMember.find(:first, :joins => :relation, :conditions => [ "visible = ? AND member_type='Way' and member_id=? ", true, self.id]) - raise OSM::APIPreconditionFailedError.new("You need to make sure that the way with id: #{self.id} is not a member of a relation.") - else - self.changeset_id = new_way.changeset_id - self.changeset = new_way.changeset - - self.tags = [] - self.nds = [] - self.visible = false - save_with_history! - end + raise OSM::APIPreconditionFailedError.new("Way #{self.id} still used by relation #{rel.relation.id}.") if rel + + self.changeset_id = new_way.changeset_id + self.changeset = new_way.changeset + + self.tags = [] + self.nds = [] + self.visible = false + save_with_history! end end