class Relation < ActiveRecord::Base
- require 'xml/libxml'
+ require "xml/libxml"
include ConsistencyValidations
include NotRedactable
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, :integer_only => true }
+ validates :version, :presence => true,
+ :numericality => { :integer_only => true }
+ validates :changeset_id, :presence => true,
+ :numericality => { :integer_only => true }
+ validates :timestamp, :presence => true
+ validates :changeset, :associated => true
+ validates :visible, :inclusion => [true, false]
scope :visible, -> { where(:visible => true) }
scope :invisible, -> { where(:visible => false) }
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|
+ 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
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.new("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
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
# 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.new("Some bad xml in relation") if relation.nil?
relation
end
end
def to_xml_node(visible_members = nil, changeset_cache = {}, user_display_name_cache = {})
- el = XML::Node.new 'relation'
- el['id'] = id.to_s
+ 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
+ p = 1 if visible_members[member.member_type][member.member_id]
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
+ 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
+ member_el["role"] = member.member_role
+ el << member_el
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]
# 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
def delete_with_history!(new_relation, user)
unless visible
- fail OSM::APIAlreadyDeletedError.new("relation", new_relation.id)
+ raise OSM::APIAlreadyDeletedError.new("relation", new_relation.id)
end
# 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.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 = {}
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.")
+ raise OSM::APIPreconditionFailedError.new("Cannot update relation #{id}: data or member data is invalid.")
end
self.changeset_id = new_relation.changeset_id
self.changeset = new_relation.changeset
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.")
+ unless preconditions_ok?
+ raise OSM::APIPreconditionFailedError.new("Cannot create relation: data or member data is invalid.")
end
self.version = 0
self.visible = true
# 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
+ 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.
+ unless element && element.visible? && element.preconditions_ok?
+ raise OSM::APIPreconditionFailedError.new("Relation with id #{id} cannot be saved due to #{m[0]} with id #{m[1]}")
end
+ 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
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.new("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]
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|
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
# 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
# materially change the rest of the relation.
any_relations =
changed_members.collect { |_id, type| type == "relation" }
- .inject(false) { |b, s| b || s }
+ .inject(false) { |acc, elem| acc || elem }
update_members = if tags_changed || any_relations
# add all non-relation bounding boxes to the changeset
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
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