require 'xml/libxml'
include ConsistencyValidations
-
- set_table_name 'current_relations'
+ include NotRedactable
+ include ObjectMetadata
+
+ 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
+ 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_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)
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
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"
return doc
end
- def to_xml_node(user_display_name_cache = nil)
- el1 = XML::Node.new 'relation'
- el1['id'] = self.id.to_s
- el1['visible'] = self.visible.to_s
- el1['timestamp'] = self.timestamp.xmlschema
- el1['version'] = self.version.to_s
- el1['changeset'] = self.changeset_id.to_s
+ def to_xml_node(visible_members = nil, changeset_cache = {}, user_display_name_cache = {})
+ el = XML::Node.new 'relation'
+ el['id'] = self.id.to_s
- user_display_name_cache = {} if user_display_name_cache.nil?
-
- if user_display_name_cache and user_display_name_cache.key?(self.changeset.user_id)
- # use the cache if available
- elsif self.changeset.user.data_public?
- user_display_name_cache[self.changeset.user_id] = self.changeset.user.display_name
- else
- user_display_name_cache[self.changeset.user_id] = nil
- end
-
- if not user_display_name_cache[self.changeset.user_id].nil?
- el1['user'] = user_display_name_cache[self.changeset.user_id]
- el1['uid'] = self.changeset.user_id.to_s
- end
+ add_metadata_to_xml_node(el, self, changeset_cache, user_display_name_cache)
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
- e['ref'] = member.member_id.to_s
- e['role'] = member.member_role
- el1 << e
+ 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
- self.relation_tags.each do |tag|
- e = XML::Node.new 'tag'
- e['k'] = tag.k
- e['v'] = tag.v
- el1 << e
- end
- return el1
- end
+ add_tags_to_xml_node(el, self.relation_tags)
- def self.find_for_nodes(ids, options = {})
- if ids.empty?
- return []
- else
- self.with_scope(:find => { :joins => "INNER JOIN current_relation_members ON current_relation_members.id = current_relations.id", :conditions => "current_relation_members.member_type = 'Node' AND current_relation_members.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 ON current_relation_members.id = current_relations.id", :conditions => "current_relation_members.member_type = 'Way' AND current_relation_members.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 ON current_relation_members.id = current_relations.id", :conditions => "current_relation_members.member_type = 'Relation' AND current_relation_members.member_id IN (#{ids.join(',')})" }) do
- return self.find(:all, options)
- end
- end
- end
+ return el
+ 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
- unless @tags
- @tags = Hash.new
- self.relation_tags.each do |tag|
- @tags[tag.k] = tag.v
- end
- end
- @tags
+ @tags ||= Hash[self.relation_tags.collect { |t| [t.k, t.v] }]
end
def members=(m)
@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)
def delete_with_history!(new_relation, user)
unless self.visible
- raise OSM::APIAlreadyDeletedError.new
+ 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!
check_consistency(self, new_relation, user)
# This will check to see if this relation is used by another relation
- if 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 another relation")
- end
+ 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 = {}
self.members = []
end
def update_from(new_relation, user)
- check_consistency(self, new_relation, user)
- if !new_relation.preconditions_ok?
- raise OSM::APIPreconditionFailedError.new
+ 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)
check_create_consistency(self, user)
- if !self.preconditions_ok?
- raise OSM::APIPreconditionFailedError.new
+ unless self.preconditions_ok?
+ raise OSM::APIPreconditionFailedError.new("Cannot create relation: data or member data is invalid.")
end
self.version = 0
self.visible = true
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
# 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
# if any members are referenced by placeholder IDs (i.e: negative) then
# this calling this method will fix them using the map from placeholders
# to IDs +id_map+.
- def fix_placeholders!(id_map)
+ def fix_placeholders!(id_map, placeholder_id = nil)
self.members.map! do |type, id, role|
old_id = id.to_i
if old_id < 0
new_id = id_map[type.downcase.to_sym][old_id]
- raise "invalid placeholder" 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]
self.timestamp = t
self.save!
- tags = self.tags
+ tags = self.tags.clone
self.relation_tags.each do |old_tag|
key = old_tag.k
# if we can match the tags we currently have to the list
# if any are different then set the flag and do the DB
# update.
if tags.has_key? key
- # rails 2.1 dirty handling should take care of making this
- # somewhat efficient... hopefully...
- old_tag.v = tags[key]
- tags_changed |= old_tag.changed?
- old_tag.save!
+ tags_changed |= (old_tag.v != tags[key])
# remove from the map, so that we can expect an empty map
# at the end if there are no new tags
else
# this means a tag was deleted
tags_changed = true
- RelationTag.delete_all ['id = ? and k = ?', self.id, old_tag.k]
end
end
# if there are left-over tags then they are new and will have to
# be added.
tags_changed |= (not tags.empty?)
- tags.each do |k,v|
+ 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
- # reload, so that all of the members are accessible in their
- # new state.
- self.reload
-
# same pattern as before, but this time we're collecting the
# 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]
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
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