X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/28b886362755cb6750b62222cecf87bd9b2efbbe..391fb933f59075e36e9cea5ea35f5a5efdfc257e:/app/models/node.rb diff --git a/app/models/node.rb b/app/models/node.rb index 09f494b7c..989cdee5c 100644 --- a/app/models/node.rb +++ b/app/models/node.rb @@ -1,5 +1,28 @@ +# == Schema Information +# +# Table name: current_nodes +# +# id :integer not null, primary key +# latitude :integer not null +# longitude :integer not null +# changeset_id :integer not null +# visible :boolean not null +# timestamp :datetime not null +# tile :integer not null +# version :integer not null +# +# Indexes +# +# current_nodes_tile_idx (tile) +# current_nodes_timestamp_idx (timestamp) +# +# Foreign Keys +# +# current_nodes_changeset_id_fkey (changeset_id => changesets.id) +# + class Node < ActiveRecord::Base - require 'xml/libxml' + require "xml/libxml" include GeoRecord include ConsistencyValidations @@ -16,21 +39,28 @@ class Node < ActiveRecord::Base has_many :ways, :through => :way_nodes has_many :node_tags - + has_many :old_way_nodes - has_many :ways_via_history, :class_name=> "Way", :through => :old_way_nodes, :source => :way + 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 - 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 + validates :id, :uniqueness => true, :presence => { :on => :update }, + :numericality => { :on => :update, :integer_only => true } + validates :version, :presence => true, + :numericality => { :integer_only => true } + validates :changeset_id, :presence => true, + :numericality => { :integer_only => true } + validates :latitude, :presence => true, + :numericality => { :integer_only => true } + validates :longitude, :presence => true, + :numericality => { :integer_only => true } + validates :timestamp, :presence => true + validates :changeset, :associated => true + validates :visible, :inclusion => [true, false] + validate :validate_position - validates_associated :changeset scope :visible, -> { where(:visible => true) } scope :invisible, -> { where(:visible => false) } @@ -41,42 +71,44 @@ class Node < ActiveRecord::Base end # Read in xml as text and return it's Node object representation - def self.from_xml(xml, create=false) - begin - p = XML::Parser.string(xml) - doc = p.parse + def self.from_xml(xml, create = false) + p = XML::Parser.string(xml, :options => XML::Parser::Options::NOERROR) + doc = p.parse - doc.find('//osm/node').each do |pt| - return Node.from_xml_node(pt, create) - end - 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) + doc.find("//osm/node").each do |pt| + return Node.from_xml_node(pt, create) end + 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 - def self.from_xml_node(pt, create=false) + def self.from_xml_node(pt, create = false) node = Node.new - - 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 = 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? + 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 = 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, "The node is outside this world" 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 + raise OSM::APIBadXMLError.new("node", pt, "Version is required when updating") unless create || !pt["version"].nil? + + node.version = create ? 0 : pt["version"].to_i unless create - 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. + 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 + raise OSM::APIBadUserInput, "ID of node cannot be zero when updating." if node.id.zero? end # We don't care about the time, as it is explicitly set on create/update/delete @@ -85,16 +117,17 @@ class Node < ActiveRecord::Base node.visible = true # Start with no tags - node.tags = Hash.new + node.tags = {} # 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']) + 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 - return node + node end ## @@ -106,58 +139,56 @@ class Node < ActiveRecord::Base # 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("node", new_node.id) - end + raise OSM::APIAlreadyDeletedError.new("node", new_node.id) unless visible - # need to start the transaction here, so that the database can + # 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! + lock! check_consistency(self, new_node, user) 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? - + raise OSM::APIPreconditionFailedError, "Node #{id} is still used by ways #{ways.collect(&: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? + raise OSM::APIPreconditionFailedError, "Node #{id} is still used by relations #{rels.collect(&: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) Node.transaction do - self.lock! + 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 + 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); - + changeset.update_bbox!(bbox) + save_with_history! end end - + def create_with_history(user) check_create_consistency(self, user) self.version = 0 @@ -171,44 +202,42 @@ class Node < ActiveRecord::Base def to_xml doc = OSM::API.new.get_xml_doc - doc.root << to_xml_node() - return doc + doc.root << to_xml_node + doc end def to_xml_node(changeset_cache = {}, user_display_name_cache = {}) - el = XML::Node.new 'node' - el['id'] = self.id.to_s + el = XML::Node.new "node" + el["id"] = id.to_s add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache) - if self.visible? - el['lat'] = self.lat.to_s - el['lon'] = self.lon.to_s + if visible? + el["lat"] = lat.to_s + el["lon"] = lon.to_s end - add_tags_to_xml_node(el, self.node_tags) + add_tags_to_xml_node(el, node_tags) - return el + el end def tags_as_hash - return tags + tags end def tags - @tags ||= Hash[self.node_tags.collect { |t| [t.k, t.v] }] + @tags ||= Hash[node_tags.collect { |t| [t.k, t.v] }] end - def tags=(t) - @tags = t - end + attr_writer :tags - def add_tag_key_val(k,v) - @tags = Hash.new unless @tags + def add_tag_key_val(k, v) + @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 + raise OSM::APIDuplicateTagsError.new("node", id, k) if @tags.include? k @tags[k] = v end @@ -223,29 +252,33 @@ class Node < ActiveRecord::Base ## # dummy method to make the interfaces of node, way and relation # more consistent. - def fix_placeholders!(id_map, placeholder_id = nil) + 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.getutc + + self.version += 1 + self.timestamp = t + Node.transaction do - self.version += 1 - self.timestamp = t - self.save! + # clone the object before saving it so that the original is + # still marked as dirty if we retry the transaction + clone.save! # Create a NodeTag tags = self.tags - NodeTag.delete_all(:node_id => self.id) - tags.each do |k,v| + NodeTag.where(:node_id => id).delete_all + tags.each do |k, v| tag = NodeTag.new - tag.node_id = self.id - tag.k = k - tag.v = v + tag.node_id = id + tag.k = k + tag.v = v tag.save! - end + end # Create an OldNode old_node = OldNode.from_node(self) @@ -259,5 +292,4 @@ class Node < ActiveRecord::Base changeset.save! end end - end