X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/dbe165bbb3d6eda37d9579f1ac767599f9055607..f906373be251d79988335e96e8046c7f001c613b:/app/models/relation.rb diff --git a/app/models/relation.rb b/app/models/relation.rb index d39fd2796..2495830ee 100644 --- a/app/models/relation.rb +++ b/app/models/relation.rb @@ -1,3 +1,22 @@ +# == Schema Information +# +# Table name: current_relations +# +# id :integer not null, primary key +# changeset_id :integer not null +# timestamp :datetime not null +# visible :boolean not null +# version :integer not null +# +# Indexes +# +# current_relations_timestamp_idx (timestamp) +# +# Foreign Keys +# +# current_relations_changeset_id_fkey (changeset_id => changesets.id) +# + class Relation < ActiveRecord::Base require "xml/libxml" @@ -33,16 +52,16 @@ 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) + p = XML::Parser.string(xml, :options => XML::Parser::Options::NOERROR) doc = p.parse doc.find("//osm/relation").each do |pt| return Relation.from_xml_node(pt, create) end - fail OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/relation element.") + raise 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) end @@ -50,17 +69,17 @@ class Relation < ActiveRecord::Base 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? + raise 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? + 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? + 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 @@ -73,8 +92,8 @@ class Relation < ActiveRecord::Base # 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? + 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 @@ -86,16 +105,13 @@ class Relation < ActiveRecord::Base 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"]) 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 @@ -106,25 +122,13 @@ class Relation < ActiveRecord::Base doc end - def to_xml_node(visible_members = nil, changeset_cache = {}, user_display_name_cache = {}) + def to_xml_node(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 - p = 1 if visible_members[member.member_type][member.member_id] - else - # otherwise, manually go to the db to check things - p = 1 if member.member.visible? - end - - next unless p - member_el = XML::Node.new "member" member_el["type"] = member.member_type.downcase member_el["ref"] = member.member_id.to_s @@ -158,11 +162,11 @@ 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 +182,17 @@ 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 +204,9 @@ 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 +218,7 @@ 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! @@ -249,24 +247,19 @@ class Relation < ActiveRecord::Base # 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 + # 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. - 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 + raise OSM::APIPreconditionFailedError, "Relation with id #{id} cannot be saved due to #{m[0]} with id #{m[1]}" unless element && 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 @@ -276,7 +269,7 @@ class Relation < ActiveRecord::Base old_id = id.to_i if old_id < 0 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] @@ -287,15 +280,19 @@ 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| @@ -318,8 +315,8 @@ 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 @@ -349,7 +346,7 @@ 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 @@ -376,7 +373,7 @@ class Relation < ActiveRecord::Base # materially change the rest of the relation. any_relations = changed_members.collect { |_id, type| type == "relation" } - .inject(false) { |a, e| a || e } + .inject(false) { |acc, elem| acc || elem } update_members = if tags_changed || any_relations # add all non-relation bounding boxes to the changeset