X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/e9527b363da441337ac8c44c9d3d3feada3eaa9c..3458d881af4584e44d72bb682771e3c7a3cf6e68:/app/models/node.rb diff --git a/app/models/node.rb b/app/models/node.rb index 5f4f7af6a..81b910f37 100644 --- a/app/models/node.rb +++ b/app/models/node.rb @@ -3,17 +3,18 @@ class Node < ActiveRecord::Base include GeoRecord include ConsistencyValidations + include NotRedactable - set_table_name 'current_nodes' + self.table_name = "current_nodes" belongs_to :changeset - has_many :old_nodes, :foreign_key => :id + has_many :old_nodes, :order => :version has_many :way_nodes has_many :ways, :through => :way_nodes - has_many :node_tags, :foreign_key => :id + has_many :node_tags has_many :old_way_nodes has_many :ways_via_history, :class_name=> "Way", :through => :old_way_nodes, :source => :way @@ -30,9 +31,12 @@ class Node < ActiveRecord::Base validate :validate_position validates_associated :changeset + scope :visible, where(:visible => true) + scope :invisible, where(:visible => false) + # Sanity check the latitude and longitude and add an error if it's broken def validate_position - errors.add_to_base("Node is not in the world") unless in_world? + errors.add(:base, "Node is not in the world") unless in_world? end # @@ -41,7 +45,6 @@ class Node < ActiveRecord::Base # Also adheres to limitations such as within max_number_of_nodes # def self.search(bounding_box, tags = {}) - min_lon, min_lat, max_lon, max_lat = *bounding_box # @fixme a bit of a hack to search for only visible nodes # couldn't think of another to add to tags condition #conditions_hash = tags.merge({ 'visible' => 1 }) @@ -56,22 +59,21 @@ class Node < ActiveRecord::Base #end #conditions = keys.join(' AND ') - find_by_area(min_lat, min_lon, max_lat, max_lon, - :conditions => {:visible => true}, - :limit => APP_CONFIG['max_number_of_nodes']+1) + find_by_area(bounding_box, :conditions => {:visible => true}, + :limit => MAX_NUMBER_OF_NODES+1) end # Read in xml as text and return it's Node object representation def self.from_xml(xml, create=false) begin - p = XML::Parser.new - p.string = xml + p = XML::Parser.string(xml) doc = p.parse doc.find('//osm/node').each do |pt| return Node.from_xml_node(pt, create) end - rescue LibXML::XML::Error => ex + raise OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/node element.") + rescue LibXML::XML::Error, ArgumentError => ex raise OSM::APIBadXMLError.new("node", xml, ex.message) end end @@ -81,8 +83,9 @@ class Node < ActiveRecord::Base raise OSM::APIBadXMLError.new("node", pt, "lat missing") if pt['lat'].nil? raise OSM::APIBadXMLError.new("node", pt, "lon missing") if pt['lon'].nil? - node.lat = pt['lat'].to_f - node.lon = pt['lon'].to_f + node.lat = OSM.parse_float(pt['lat'], OSM::APIBadXMLError, "node", pt, "lat not a number") + node.lon = OSM.parse_float(pt['lon'], OSM::APIBadXMLError, "node", pt, "lon not a number") + raise OSM::APIBadXMLError.new("node", pt, "Changeset id is missing") if pt['changeset'].nil? node.changeset_id = pt['changeset'].to_i raise OSM::APIBadUserInput.new("The node is outside this world") unless node.in_world? @@ -92,26 +95,25 @@ class Node < ActiveRecord::Base node.version = create ? 0 : pt['version'].to_i unless create - if pt['id'] != '0' - node.id = pt['id'].to_i - end + raise OSM::APIBadXMLError.new("node", pt, "ID is required when updating.") if pt['id'].nil? + node.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 node cannot be zero when updating.") if node.id == 0 end - # visible if it says it is, or as the default if the attribute - # is missing. - node.visible = pt['visible'].nil? or pt['visible'] == 'true' - - if create - node.timestamp = Time.now - else - if pt['timestamp'] - node.timestamp = Time.parse(pt['timestamp']) - end - end + # We don't care about the time, as it is explicitly set on create/update/delete + # We don't care about the visibility as it is implicit based on the action + # and set manually before the actual delete + node.visible = true - tags = [] + # Start with no tags + node.tags = Hash.new + # Add in any tags from the XML pt.find('tag').each do |tag| + raise OSM::APIBadXMLError.new("node", pt, "tag is missing key") if tag['k'].nil? + raise OSM::APIBadXMLError.new("node", pt, "tag is missing value") if tag['v'].nil? node.add_tag_key_val(tag['k'],tag['v']) end @@ -122,53 +124,61 @@ class Node < ActiveRecord::Base # the bounding box around a node, which is used for determining the changeset's # bounding box def bbox - [ longitude, latitude, longitude, latitude ] + BoundingBox.new(longitude, latitude, longitude, latitude) end # Should probably be renamed delete_from to come in line with update def delete_with_history!(new_node, user) unless self.visible - raise OSM::APIAlreadyDeletedError.new + raise OSM::APIAlreadyDeletedError.new("node", new_node.id) 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. Node.transaction do + self.lock! check_consistency(self, new_node, user) - if WayNode.find(:first, :joins => "INNER JOIN current_ways ON current_ways.id = current_way_nodes.id", :conditions => [ "current_ways.visible = ? AND current_way_nodes.node_id = ?", true, self.id ]) - raise OSM::APIPreconditionFailedError.new - elsif RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = ? AND member_type='node' and member_id=? ", true, self.id]) - raise OSM::APIPreconditionFailedError.new - else - self.changeset_id = new_node.changeset_id - self.visible = false - - # update the changeset with the deleted position - changeset.update_bbox!(bbox) - - save_with_history! - end + ways = Way.joins(:way_nodes).where(:visible => true, :current_way_nodes => { :node_id => id }).order(:id) + raise OSM::APIPreconditionFailedError.new("Node #{self.id} is still used by ways #{ways.collect { |w| w.id }.join(",")}.") unless ways.empty? + + rels = Relation.joins(:relation_members).where(:visible => true, :current_relation_members => { :member_type => "Node", :member_id => id }).order(:id) + raise OSM::APIPreconditionFailedError.new("Node #{self.id} is still used by relations #{rels.collect { |r| r.id }.join(",")}.") unless rels.empty? + + self.changeset_id = new_node.changeset_id + self.tags = {} + self.visible = false + + # update the changeset with the deleted position + changeset.update_bbox!(bbox) + + save_with_history! end end def update_from(new_node, user) - check_consistency(self, new_node, user) - - # update changeset with *old* position first - changeset.update_bbox!(bbox); - - # FIXME logic needs to be double checked - self.changeset_id = new_node.changeset_id - self.latitude = new_node.latitude - self.longitude = new_node.longitude - self.tags = new_node.tags - self.visible = true - - # update changeset with *new* position - changeset.update_bbox!(bbox); - - save_with_history! + Node.transaction do + self.lock! + check_consistency(self, new_node, user) + + # update changeset first + self.changeset_id = new_node.changeset_id + self.changeset = new_node.changeset + + # update changeset bbox with *old* position first + changeset.update_bbox!(bbox); + + # FIXME logic needs to be double checked + self.latitude = new_node.latitude + self.longitude = new_node.longitude + self.tags = new_node.tags + self.visible = true + + # update changeset bbox with *new* position + changeset.update_bbox!(bbox); + + save_with_history! + end end def create_with_history(user) @@ -188,27 +198,36 @@ class Node < ActiveRecord::Base return doc end - def to_xml_node(user_display_name_cache = nil) + def to_xml_node(changeset_cache = {}, user_display_name_cache = {}) el1 = XML::Node.new 'node' el1['id'] = self.id.to_s - el1['lat'] = self.lat.to_s - el1['lon'] = self.lon.to_s el1['version'] = self.version.to_s el1['changeset'] = self.changeset_id.to_s - - user_display_name_cache = {} if user_display_name_cache.nil? - if user_display_name_cache and user_display_name_cache.key?(self.changeset.user_id) + if self.visible? + el1['lat'] = self.lat.to_s + el1['lon'] = self.lon.to_s + end + + if changeset_cache.key?(self.changeset_id) + # use the cache if available + else + changeset_cache[self.changeset_id] = self.changeset.user_id + end + + user_id = changeset_cache[self.changeset_id] + + if user_display_name_cache.key?(user_id) # use the cache if available elsif self.changeset.user.data_public? - user_display_name_cache[self.changeset.user_id] = self.changeset.user.display_name + user_display_name_cache[user_id] = self.changeset.user.display_name else - user_display_name_cache[self.changeset.user_id] = nil + user_display_name_cache[user_id] = nil end - 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 + if not user_display_name_cache[user_id].nil? + el1['user'] = user_display_name_cache[user_id] + el1['uid'] = user_id.to_s end self.tags.each do |k,v| @@ -261,14 +280,14 @@ class Node < ActiveRecord::Base ## # dummy method to make the interfaces of node, way and relation # more consistent. - def fix_placeholders!(id_map) + def fix_placeholders!(id_map, placeholder_id = nil) # nodes don't refer to anything, so there is nothing to do here end private def save_with_history! - t = Time.now + t = Time.now.getutc Node.transaction do self.version += 1 self.timestamp = t @@ -276,12 +295,12 @@ class Node < ActiveRecord::Base # Create a NodeTag tags = self.tags - NodeTag.delete_all(['id = ?', self.id]) + NodeTag.delete_all(:node_id => self.id) tags.each do |k,v| tag = NodeTag.new + tag.node_id = self.id tag.k = k tag.v = v - tag.id = self.id tag.save! end