X-Git-Url: https://git.openstreetmap.org./rails.git/blobdiff_plain/3e9b6845d34f9cd80f9eb1099f76f7801bfae76f..e2f55c1c1b3345be7c7737a27eb27c8964420b9c:/app/models/relation.rb?ds=sidebyside diff --git a/app/models/relation.rb b/app/models/relation.rb index 08b77f449..581dce16f 100644 --- a/app/models/relation.rb +++ b/app/models/relation.rb @@ -2,15 +2,16 @@ class Relation < ActiveRecord::Base require 'xml/libxml' include ConsistencyValidations - - set_table_name 'current_relations' + include NotRedactable + + self.table_name = "current_relations" belongs_to :changeset - has_many :old_relations, :foreign_key => 'id', :order => 'version' + has_many :old_relations, -> { order(:version) } - has_many :relation_members, :foreign_key => 'id', :order => 'sequence_id' - has_many :relation_tags, :foreign_key => 'id' + has_many :relation_members, -> { order(:sequence_id) } + has_many :relation_tags 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 @@ -23,6 +24,12 @@ class Relation < ActiveRecord::Base validates_numericality_of :changeset_id, :version, :integer_only => true validates_associated :changeset + scope :visible, -> { where(:visible => true) } + scope :invisible, -> { where(:visible => false) } + scope :nodes, ->(*ids) { joins(:relation_members).where(:current_relation_members => { :member_type => "Node", :member_id => ids.flatten }) } + 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 = ["node", "way", "relation"] def self.from_xml(xml, create=false) @@ -33,6 +40,7 @@ class Relation < ActiveRecord::Base doc.find('//osm/relation').each do |pt| return Relation.from_xml_node(pt, create) end + 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 @@ -41,30 +49,40 @@ class Relation < ActiveRecord::Base def self.from_xml_node(pt, create=false) relation = Relation.new - if !create and pt['id'] != '0' + raise OSM::APIBadXMLError.new("relation", pt, "Version is required when updating") unless create or not 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 + 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 + raise OSM::APIBadUserInput.new("ID of relation cannot be zero when updating.") if relation.id == 0 end + + # We don't care about the timestamp nor the visibility as these are either + # set explicitly or implicit in the action. The visibility is set to true, + # and manually set to false before the actual delete. + relation.visible = true - raise OSM::APIBadXMLError.new("relation", pt, "You are missing the required changeset in the relation") if pt['changeset'].nil? - relation.changeset_id = pt['changeset'] - - # The follow block does not need to be executed because they are dealt with - # in create_with_history, update_from and delete_with_history - if create - relation.timestamp = Time.now.getutc - relation.visible = true - relation.version = 0 - else - if pt['timestamp'] - relation.timestamp = Time.parse(pt['timestamp']) - end - relation.version = pt['version'] - end + # Start with no tags + relation.tags = Hash.new + # Add in any tags from the XML 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 + # isn't done for a new relation then @members attribute will be nil, + # and the members will be loaded from the database instead of being + # empty, as intended. + relation.members = Array.new + pt.find('member').each do |member| #member_type = logger.debug "each member" @@ -87,7 +105,7 @@ class Relation < ActiveRecord::Base return doc end - def to_xml_node(changeset_cache = {}, user_display_name_cache = {}) + def to_xml_node(visible_members = nil, changeset_cache = {}, user_display_name_cache = {}) el1 = XML::Node.new 'relation' el1['id'] = self.id.to_s el1['visible'] = self.visible.to_s @@ -118,17 +136,17 @@ class Relation < ActiveRecord::Base self.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 + 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 + end if p e = XML::Node.new 'member' e['type'] = member.member_type.downcase @@ -147,45 +165,11 @@ class Relation < ActiveRecord::Base return el1 end - def self.find_for_nodes(ids, options = {}) - if ids.empty? - return [] - else - self.with_scope(:find => { :joins => "INNER JOIN current_relation_members AS crm ON crm.id = current_relations.id", :conditions => "crm.member_type = 'Node' AND crm.member_id IN (#{ids.join(',')})" }) do - return self.find(:all, options) - end - end - end - - def self.find_for_ways(ids, options = {}) - if ids.empty? - return [] - else - self.with_scope(:find => { :joins => "INNER JOIN current_relation_members AS crm ON crm.id = current_relations.id", :conditions => "crm.member_type = 'Way' AND crm.member_id IN (#{ids.join(',')})" }) do - return self.find(:all, options) - end - end - end - - def self.find_for_relations(ids, options = {}) - if ids.empty? - return [] - else - self.with_scope(:find => { :joins => "INNER JOIN current_relation_members AS crm ON crm.id = current_relations.id", :conditions => "crm.member_type = 'Relation' AND crm.member_id IN (#{ids.join(',')})" }) do - return self.find(:all, options) - end - end - end - # FIXME is this really needed? def members - unless @members - @members = Array.new - self.relation_members.each do |member| - @members += [[member.member_type,member.member_id,member.member_role]] - end + @members ||= self.relation_members.map do |member| + [member.member_type, member.member_id, member.member_role] end - @members end def tags @@ -206,9 +190,9 @@ class Relation < ActiveRecord::Base @tags = t end - def add_member(type,id,role) - @members = Array.new unless @members - @members += [[type,id,role]] + def add_member(type, id, role) + @members ||= [] + @members << [type, id.to_i, role] end def add_tag_keyval(k, v) @@ -240,10 +224,11 @@ class Relation < ActiveRecord::Base # provide repeatable reads for the used-by checks. this means it # shouldn't be possible to get race conditions. Relation.transaction do + self.lock! check_consistency(self, new_relation, user) # This will check to see if this relation is used by another relation - rel = RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id", :conditions => [ "visible = ? AND member_type='Relation' and member_id=? ", true, self.id ]) - raise OSM::APIPreconditionFailedError.new("The relation #{new_relation.id} is a used in relation #{rel.id}.") unless rel.nil? + rel = RelationMember.joins(:relation).where("visible = ? AND member_type = 'Relation' and member_id = ? ", true, self.id).first + raise OSM::APIPreconditionFailedError.new("The relation #{new_relation.id} is used in relation #{rel.relation.id}.") unless rel.nil? self.changeset_id = new_relation.changeset_id self.tags = {} @@ -254,16 +239,19 @@ class Relation < ActiveRecord::Base end def update_from(new_relation, user) - check_consistency(self, new_relation, user) - unless new_relation.preconditions_ok? - raise OSM::APIPreconditionFailedError.new("Cannot update relation #{self.id}: data or member data is invalid.") + Relation.transaction do + self.lock! + check_consistency(self, new_relation, user) + unless new_relation.preconditions_ok?(self.members) + raise OSM::APIPreconditionFailedError.new("Cannot update relation #{self.id}: data or member data is invalid.") + end + self.changeset_id = new_relation.changeset_id + self.changeset = new_relation.changeset + self.tags = new_relation.tags + self.members = new_relation.members + self.visible = true + save_with_history! end - self.changeset_id = new_relation.changeset_id - self.changeset = new_relation.changeset - self.tags = new_relation.tags - self.members = new_relation.members - self.visible = true - save_with_history! end def create_with_history(user) @@ -276,7 +264,7 @@ class Relation < ActiveRecord::Base save_with_history! end - def preconditions_ok? + def preconditions_ok?(good_members = []) # These are hastables that store an id in the index of all # the nodes/way/relations that have already been added. # If the member is valid and visible then we add it to the @@ -285,28 +273,29 @@ class Relation < ActiveRecord::Base # relation, then the hash table nodes would contain: # => {50=>true, 1=>true} elements = { :node => Hash.new, :way => Hash.new, :relation => Hash.new } + + # pre-set all existing members to good + good_members.each { |m| elements[m[0].downcase.to_sym][m[1]] = true } + self.members.each do |m| # find the hash for the element type or die - logger.debug m[0] hash = elements[m[0].downcase.to_sym] or return false # 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.find(m[1]) + element = model.where(:id => m[1]).first # and check that it is OK to use. unless element and element.visible? and element.preconditions_ok? - return false + raise OSM::APIPreconditionFailedError.new("Relation with id #{self.id} cannot be saved due to #{m[0]} with id #{m[1]}") end hash[m[1]] = true end end return true - rescue - return false end # Temporary method to match interface to nodes @@ -366,12 +355,12 @@ class Relation < ActiveRecord::Base # if there are left-over tags then they are new and will have to # be added. tags_changed |= (not tags.empty?) - RelationTag.delete_all(:id => self.id) + RelationTag.delete_all(:relation_id => self.id) self.tags.each do |k,v| tag = RelationTag.new + tag.relation_id = self.id tag.k = k tag.v = v - tag.id = self.id tag.save! end @@ -379,30 +368,28 @@ class Relation < ActiveRecord::Base # changed members in an array, as the bounding box updates for # elements are per-element, not blanked on/off like for tags. changed_members = Array.new - members = Hash.new - self.members.each do |m| - # should be: h[[m.id, m.type]] = m.role, but someone prefers arrays - members[[m[1], m[0]]] = m[2] - end - relation_members.each do |old_member| - key = [old_member.member_id.to_s, old_member.member_type] - if members.has_key? key - members.delete key - else + members = self.members.clone + self.relation_members.each do |old_member| + key = [old_member.member_type, old_member.member_id, old_member.member_role] + i = members.index key + if i.nil? changed_members << key + else + members.delete_at i end end # any remaining members must be new additions - changed_members += members.keys + changed_members += members # update the members. first delete all the old members, as the new # 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(:id => self.id) + RelationMember.delete_all(:relation_id => self.id) members.each_with_index do |m,i| mem = RelationMember.new - mem.id = [self.id, i] + mem.relation_id = self.id + mem.sequence_id = i mem.member_type = m[0] mem.member_id = m[1] mem.member_role = m[2] @@ -427,21 +414,17 @@ class Relation < ActiveRecord::Base changed_members.collect { |id,type| type == "relation" }. inject(false) { |b,s| b or s } - if tags_changed or 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. - self.members.each do |type, id, role| - if type != "Relation" - update_changeset_element(type, id) - end - end - else - # add only changed members to the changeset - changed_members.each do |id, type| - if type != "Relation" - update_changeset_element(type, id) - end + update_members = if tags_changed or 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. + self.members + else + changed_members + end + update_members.each do |type, id, role| + if type != "Relation" + update_changeset_element(type, id) end end