X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/700da2b3470de2a7826472160e1c93d8a983fefa..e192c779862acdde8b0191faca8a2910f2008719:/app/models/node.rb diff --git a/app/models/node.rb b/app/models/node.rb index c8770922d..1392fc650 100644 --- a/app/models/node.rb +++ b/app/models/node.rb @@ -2,15 +2,11 @@ class Node < ActiveRecord::Base require 'xml/libxml' include GeoRecord + include ConsistencyValidations set_table_name 'current_nodes' - - validates_presence_of :user_id, :timestamp - validates_inclusion_of :visible, :in => [ true, false ] - validates_numericality_of :latitude, :longitude - validate :validate_position - belongs_to :user + belongs_to :changeset has_many :old_nodes, :foreign_key => :id @@ -19,9 +15,21 @@ class Node < ActiveRecord::Base has_many :node_tags, :foreign_key => :id + has_many :old_way_nodes + has_many :ways_via_history, :class_name=> "Way", :through => :old_way_nodes, :source => :way + 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 :timestamp,:version, :changeset_id + validates_uniqueness_of :id + validates_inclusion_of :visible, :in => [ true, false ] + validates_numericality_of :latitude, :longitude, :changeset_id, :version, :integer_only => true + validates_numericality_of :id, :on => :update, :integer_only => true + validate :validate_position + validates_associated :changeset + # 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? @@ -49,33 +57,39 @@ class Node < ActiveRecord::Base #conditions = keys.join(' AND ') find_by_area(min_lat, min_lon, max_lat, max_lon, - :conditions => 'visible = 1', + :conditions => {:visible => true}, :limit => APP_CONFIG['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 - return nil + rescue LibXML::XML::Error, ArgumentError => ex + raise OSM::APIBadXMLError.new("node", xml, ex.message) end end def self.from_xml_node(pt, create=false) node = Node.new - node.version = pt['version'] + 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 + raise OSM::APIBadXMLError.new("node", pt, "changeset id 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? - return nil unless node.in_world? + # version must be present unless creating + raise OSM::APIBadXMLError.new("node", pt, "Version is required when updating") unless create or not pt['version'].nil? + node.version = create ? 0 : pt['version'].to_i unless create if pt['id'] != '0' @@ -83,15 +97,12 @@ class Node < ActiveRecord::Base end end - node.visible = pt['visible'] and pt['visible'] == 'true' + # visible if it says it is, or as the default if the attribute + # is missing. + # Don't need to set the visibility, when it is set explicitly in the create/update/delete + #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 tags = [] @@ -102,57 +113,70 @@ class Node < ActiveRecord::Base return node end - def save_with_history! - t = Time.now - Node.transaction do - self.version += 1 - self.timestamp = t - self.save! - - # Create a NodeTag - tags = self.tags - NodeTag.delete_all(['id = ?', self.id]) - tags.each do |k,v| - tag = NodeTag.new - tag.k = k - tag.v = v - tag.id = self.id - tag.save! - end + ## + # the bounding box around a node, which is used for determining the changeset's + # bounding box + def bbox + [ longitude, latitude, longitude, latitude ] + end - # Create an OldNode - old_node = OldNode.from_node(self) - old_node.timestamp = t - old_node.save_with_dependencies! + # 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 end - end - def delete_with_history(user) - if self.visible - if WayNode.find(:first, :joins => "INNER JOIN current_ways ON current_ways.id = current_way_nodes.id", :conditions => [ "current_ways.visible = 1 AND current_way_nodes.node_id = ?", 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 = 1 AND member_type='node' and member_id=?", self.id]) - raise OSM::APIPreconditionFailedError.new + # 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 + 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.user_id = user.id - self.visible = 0 - save_with_history! + 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 - else - raise OSM::APIAlreadyDeletedError.new end end def update_from(new_node, user) - if new_node.version != version - raise OSM::APIVersionMismatchError.new(new_node.version, version) - end + 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); - self.user_id = user.id + # 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 + + def create_with_history(user) + check_create_consistency(self, user) + self.version = 0 + self.visible = true + + # update the changeset to include the new location + changeset.update_bbox!(bbox) + save_with_history! end @@ -167,18 +191,23 @@ class Node < ActiveRecord::Base 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.user_id) + if user_display_name_cache and user_display_name_cache.key?(self.changeset.user_id) # use the cache if available - elsif self.user.data_public? - user_display_name_cache[self.user_id] = self.user.display_name + elsif self.changeset.user.data_public? + user_display_name_cache[self.changeset.user_id] = self.changeset.user.display_name else - user_display_name_cache[self.user_id] = nil + user_display_name_cache[self.changeset.user_id] = nil end - el1['user'] = user_display_name_cache[self.user_id] unless user_display_name_cache[self.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 self.tags.each do |k,v| el2 = XML::Node.new('tag') @@ -189,7 +218,6 @@ class Node < ActiveRecord::Base el1['visible'] = self.visible.to_s el1['timestamp'] = self.timestamp.xmlschema - el1['version'] = self.version.to_s return el1 end @@ -213,9 +241,59 @@ class Node < ActiveRecord::Base def add_tag_key_val(k,v) @tags = Hash.new unless @tags + + # duplicate tags are now forbidden, so we can't allow values + # in the hash to be overwritten. + raise OSM::APIDuplicateTagsError.new("node", self.id, k) if @tags.include? k + @tags[k] = v end + ## + # are the preconditions OK? this is mainly here to keep the duck + # typing interface the same between nodes, ways and relations. + def preconditions_ok? + in_world? + end + + ## + # dummy method to make the interfaces of node, way and relation + # more consistent. + def fix_placeholders!(id_map) + # nodes don't refer to anything, so there is nothing to do here + end + + private + + def save_with_history! + t = Time.now.getutc + Node.transaction do + self.version += 1 + self.timestamp = t + self.save! + + # Create a NodeTag + tags = self.tags + NodeTag.delete_all(['id = ?', self.id]) + tags.each do |k,v| + tag = NodeTag.new + tag.k = k + tag.v = v + tag.id = self.id + tag.save! + end + + # Create an OldNode + old_node = OldNode.from_node(self) + old_node.timestamp = t + old_node.save_with_dependencies! + # tell the changeset we updated one element only + changeset.add_changes! 1 + # save the changeset in case of bounding box updates + changeset.save! + end + end + end