X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/ef7f3d800cbdd49b692df10d312e5fd880e2e938..a0dd71112a910f68383392bc9efaa26b8e042d3e:/app/models/relation.rb diff --git a/app/models/relation.rb b/app/models/relation.rb index c59ae47d1..365ea533e 100644 --- a/app/models/relation.rb +++ b/app/models/relation.rb @@ -1,5 +1,24 @@ -class Relation < ActiveRecord::Base - require 'xml/libxml' +# == Schema Information +# +# Table name: current_relations +# +# id :bigint(8) not null, primary key +# changeset_id :bigint(8) not null +# timestamp :datetime not null +# visible :boolean not null +# version :bigint(8) not null +# +# Indexes +# +# current_relations_timestamp_idx (timestamp) +# +# Foreign Keys +# +# current_relations_changeset_id_fkey (changeset_id => changesets.id) +# + +class Relation < ApplicationRecord + require "xml/libxml" include ConsistencyValidations include NotRedactable @@ -17,13 +36,15 @@ class Relation < 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 - 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 :id, :on => :update, :integer_only => true - validates_numericality_of :changeset_id, :version, :integer_only => true - validates_associated :changeset + validates :id, :uniqueness => true, :presence => { :on => :update }, + :numericality => { :on => :update, :only_integer => true } + validates :version, :presence => true, + :numericality => { :only_integer => true } + validates :changeset_id, :presence => true, + :numericality => { :only_integer => true } + validates :timestamp, :presence => true + validates :changeset, :associated => true + validates :visible, :inclusion => [true, false] scope :visible, -> { where(:visible => true) } scope :invisible, -> { where(:visible => false) } @@ -31,34 +52,39 @@ class Relation < ActiveRecord::Base scope :ways, ->(*ids) { joins(:relation_members).where(:current_relation_members => { :member_type => "Way", :member_id => ids.flatten }) } scope :relations, ->(*ids) { joins(:relation_members).where(:current_relation_members => { :member_type => "Relation", :member_id => ids.flatten }) } - TYPES = %w(node way relation) + TYPES = %w[node way relation].freeze - def self.from_xml(xml, create = false) - p = XML::Parser.string(xml) + def self.from_xml(xml, create: false) + p = XML::Parser.string(xml, :options => XML::Parser::Options::NOERROR) doc = p.parse + pt = doc.find_first("//osm/relation") - doc.find('//osm/relation').each do |pt| - return Relation.from_xml_node(pt, create) + if pt + Relation.from_xml_node(pt, :create => create) + else + raise OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/relation element.") end - fail OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/relation element.") - rescue LibXML::XML::Error, ArgumentError => ex - raise OSM::APIBadXMLError.new("relation", xml, ex.message) + rescue LibXML::XML::Error, ArgumentError => e + raise OSM::APIBadXMLError.new("relation", xml, e.message) end - def self.from_xml_node(pt, create = false) + def self.from_xml_node(pt, create: false) relation = Relation.new - fail OSM::APIBadXMLError.new("relation", pt, "Version is required when updating") unless create || !pt['version'].nil? - relation.version = pt['version'] - fail OSM::APIBadXMLError.new("relation", pt, "Changeset id is missing") if pt['changeset'].nil? - relation.changeset_id = pt['changeset'] + raise OSM::APIBadXMLError.new("relation", pt, "Version is required when updating") unless create || !pt["version"].nil? + + relation.version = pt["version"] + raise OSM::APIBadXMLError.new("relation", pt, "Changeset id is missing") if pt["changeset"].nil? + + relation.changeset_id = pt["changeset"] unless create - fail OSM::APIBadXMLError.new("relation", pt, "ID is required when updating") if pt['id'].nil? - relation.id = pt['id'].to_i + raise OSM::APIBadXMLError.new("relation", pt, "ID is required when updating") if pt["id"].nil? + + relation.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 - fail OSM::APIBadUserInput.new("ID of relation cannot be zero when updating.") if relation.id == 0 + raise OSM::APIBadUserInput, "ID of relation cannot be zero when updating." if relation.id.zero? end # We don't care about the timestamp nor the visibility as these are either @@ -70,10 +96,11 @@ class Relation < ActiveRecord::Base relation.tags = {} # Add in any tags from the XML - pt.find('tag').each do |tag| - fail OSM::APIBadXMLError.new("relation", pt, "tag is missing key") if tag['k'].nil? - fail OSM::APIBadXMLError.new("relation", pt, "tag is missing value") if tag['v'].nil? - relation.add_tag_keyval(tag['k'], tag['v']) + pt.find("tag").each do |tag| + raise OSM::APIBadXMLError.new("relation", pt, "tag is missing key") if tag["k"].nil? + raise OSM::APIBadXMLError.new("relation", pt, "tag is missing value") if tag["v"].nil? + + relation.add_tag_keyval(tag["k"], tag["v"]) end # need to initialise the relation members array explicitly, as if this @@ -82,62 +109,21 @@ class Relation < ActiveRecord::Base # empty, as intended. relation.members = [] - pt.find('member').each do |member| + pt.find("member").each do |member| # member_type = - logger.debug "each member" - fail OSM::APIBadXMLError.new("relation", pt, "The #{member['type']} is not allowed only, #{TYPES.inspect} allowed") unless TYPES.include? member['type'] - logger.debug "after raise" + raise OSM::APIBadXMLError.new("relation", pt, "The #{member['type']} is not allowed only, #{TYPES.inspect} allowed") unless TYPES.include? member["type"] + # member_ref = member['ref'] # member_role - member['role'] ||= "" # Allow the upload to not include this, in which case we default to an empty string. - logger.debug member['role'] - relation.add_member(member['type'].classify, member['ref'], member['role']) + member["role"] ||= "" # Allow the upload to not include this, in which case we default to an empty string. + relation.add_member(member["type"].classify, member["ref"], member["role"]) end - fail OSM::APIBadUserInput.new("Some bad xml in relation") if relation.nil? + raise OSM::APIBadUserInput, "Some bad xml in relation" if relation.nil? relation end - def to_xml - doc = OSM::API.new.get_xml_doc - doc.root << to_xml_node - doc - end - - def to_xml_node(visible_members = nil, changeset_cache = {}, user_display_name_cache = {}) - el = XML::Node.new 'relation' - el['id'] = id.to_s - - add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache) - - relation_members.each do |member| - p = 0 - if visible_members - # if there is a list of visible members then use that to weed out deleted segments - if visible_members[member.member_type][member.member_id] - p = 1 - end - else - # otherwise, manually go to the db to check things - if member.member.visible? - p = 1 - end - end - if p - member_el = XML::Node.new 'member' - member_el['type'] = member.member_type.downcase - member_el['ref'] = member.member_id.to_s - member_el['role'] = member.member_role - el << member_el - end - end - - add_tags_to_xml_node(el, relation_tags) - - el - end - - # FIXME is this really needed? + # FIXME: is this really needed? def members @members ||= relation_members.map do |member| [member.member_type, member.member_id, member.member_role] @@ -145,12 +131,10 @@ class Relation < ActiveRecord::Base end def tags - @tags ||= Hash[relation_tags.collect { |t| [t.k, t.v] }] + @tags ||= relation_tags.collect { |t| [t.k, t.v] }.to_h end - attr_writer :members - - attr_writer :tags + attr_writer :members, :tags def add_member(type, id, role) @members ||= [] @@ -158,11 +142,11 @@ class Relation < ActiveRecord::Base end def add_tag_keyval(k, v) - @tags = {} unless @tags + @tags ||= {} # duplicate tags are now forbidden, so we can't allow values # in the hash to be overwritten. - fail OSM::APIDuplicateTagsError.new("relation", id, k) if @tags.include? k + raise OSM::APIDuplicateTagsError.new("relation", id, k) if @tags.include? k @tags[k] = v end @@ -178,19 +162,17 @@ class Relation < ActiveRecord::Base end def delete_with_history!(new_relation, user) - unless visible - fail OSM::APIAlreadyDeletedError.new("relation", new_relation.id) - end + raise OSM::APIAlreadyDeletedError.new("relation", new_relation.id) unless visible # 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. Relation.transaction do - self.lock! + lock! check_consistency(self, new_relation, user) # This will check to see if this relation is used by another relation - rel = RelationMember.joins(:relation).where("visible = ? AND member_type = 'Relation' and member_id = ? ", true, id).first - fail OSM::APIPreconditionFailedError.new("The relation #{new_relation.id} is used in relation #{rel.relation.id}.") unless rel.nil? + rel = RelationMember.joins(:relation).find_by("visible = ? AND member_type = 'Relation' and member_id = ? ", true, id) + raise OSM::APIPreconditionFailedError, "The relation #{new_relation.id} is used in relation #{rel.relation.id}." unless rel.nil? self.changeset_id = new_relation.changeset_id self.tags = {} @@ -202,11 +184,10 @@ class Relation < ActiveRecord::Base def update_from(new_relation, user) Relation.transaction do - self.lock! + lock! check_consistency(self, new_relation, user) - unless new_relation.preconditions_ok?(members) - fail OSM::APIPreconditionFailedError.new("Cannot update relation #{id}: data or member data is invalid.") - end + raise OSM::APIPreconditionFailedError, "Cannot update relation #{id}: data or member data is invalid." unless new_relation.preconditions_ok?(members) + self.changeset_id = new_relation.changeset_id self.changeset = new_relation.changeset self.tags = new_relation.tags @@ -218,9 +199,8 @@ class Relation < ActiveRecord::Base def create_with_history(user) check_create_consistency(self, user) - unless self.preconditions_ok? - fail OSM::APIPreconditionFailedError.new("Cannot create relation: data or member data is invalid.") - end + raise OSM::APIPreconditionFailedError, "Cannot create relation: data or member data is invalid." unless preconditions_ok? + self.version = 0 self.visible = true save_with_history! @@ -243,29 +223,26 @@ class Relation < ActiveRecord::Base # find the hash for the element type or die hash = elements[m[0].downcase.to_sym] return false unless hash + # unless its in the cache already - unless hash.key? m[1] - # use reflection to look up the appropriate class - model = Kernel.const_get(m[0].capitalize) - # get the element with that ID - element = model.where(:id => m[1]).first - - # and check that it is OK to use. - unless element && element.visible? && element.preconditions_ok? - fail OSM::APIPreconditionFailedError.new("Relation with id #{id} cannot be saved due to #{m[0]} with id #{m[1]}") - end - hash[m[1]] = true - end + next if hash.key? m[1] + + # use reflection to look up the appropriate class + model = Kernel.const_get(m[0].capitalize) + # get the element with that ID. and, if found, lock the element to + # ensure it can't be deleted until after the current transaction + # commits. + element = model.lock("for share").find_by(:id => m[1]) + + # and check that it is OK to use. + raise OSM::APIPreconditionFailedError, "Relation with id #{id} cannot be saved due to #{m[0]} with id #{m[1]}" unless element&.visible? && element&.preconditions_ok? + + hash[m[1]] = true end true end - # Temporary method to match interface to nodes - def tags_as_hash - tags - end - ## # if any members are referenced by placeholder IDs (i.e: negative) then # this calling this method will fix them using the map from placeholders @@ -273,9 +250,10 @@ class Relation < ActiveRecord::Base def fix_placeholders!(id_map, placeholder_id = nil) members.map! do |type, id, role| old_id = id.to_i - if old_id < 0 + if old_id.negative? new_id = id_map[type.downcase.to_sym][old_id] - fail OSM::APIBadUserInput.new("Placeholder #{type} not found for reference #{old_id} in relation #{self.id.nil? ? placeholder_id : self.id}.") if new_id.nil? + raise OSM::APIBadUserInput, "Placeholder #{type} not found for reference #{old_id} in relation #{self.id.nil? ? placeholder_id : self.id}." if new_id.nil? + [type, new_id, role] else [type, id, role] @@ -286,15 +264,19 @@ class Relation < ActiveRecord::Base private def save_with_history! + t = Time.now.getutc + + self.version += 1 + self.timestamp = t + Relation.transaction do # have to be a little bit clever here - to detect if any tags # changed then we have to monitor their before and after state. tags_changed = false - t = Time.now.getutc - 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! tags = self.tags.clone relation_tags.each do |old_tag| @@ -317,8 +299,8 @@ class Relation < ActiveRecord::Base end # if there are left-over tags then they are new and will have to # be added. - tags_changed |= (!tags.empty?) - RelationTag.delete_all(:relation_id => id) + tags_changed |= !tags.empty? + RelationTag.where(:relation_id => id).delete_all self.tags.each do |k, v| tag = RelationTag.new tag.relation_id = id @@ -348,7 +330,7 @@ class Relation < ActiveRecord::Base # members may be in a different order and i don't feel like implementing # a longest common subsequence algorithm to optimise this. members = self.members - RelationMember.delete_all(:relation_id => id) + RelationMember.where(:relation_id => id).delete_all members.each_with_index do |m, i| mem = RelationMember.new mem.relation_id = id @@ -374,10 +356,12 @@ class Relation < ActiveRecord::Base # reasonable on the assumption that adding or removing members doesn't # materially change the rest of the relation. any_relations = - changed_members.collect { |_id, type| type == "relation" } - .inject(false) { |b, s| b || s } + changed_members.collect { |type, _id, _role| type == "Relation" } + .inject(false) { |acc, elem| acc || elem } - update_members = if tags_changed || any_relations + # if the relation is being deleted tags_changed will be true and members empty + # so we need to use changed_members to create a correct bounding box + update_members = if visible && (tags_changed || any_relations) # add all non-relation bounding boxes to the changeset # FIXME: check for tag changes along with element deletions and # make sure that the deleted element's bounding box is hit. @@ -386,9 +370,7 @@ class Relation < ActiveRecord::Base changed_members end update_members.each do |type, id, _role| - if type != "Relation" - update_changeset_element(type, id) - end + update_changeset_element(type, id) if type != "Relation" end # tell the changeset we updated one element only