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
validates_numericality_of :changeset_id, :version, :integer_only => true
validates_associated :changeset
+ scope :visible, where(:visible => true)
+ scope :invisible, where(:visible => false)
+ scope :nodes, lambda { |*ids| joins(:relation_members).where(:current_relation_members => { :member_type => "Node", :member_id => ids }) }
+ scope :ways, lambda { |*ids| joins(:relation_members).where(:current_relation_members => { :member_type => "Way", :member_id => ids }) }
+ scope :relations, lambda { |*ids| joins(:relation_members).where(:current_relation_members => { :member_type => "Relation", :member_id => ids }) }
+
TYPES = ["node", "way", "relation"]
def self.from_xml(xml, create=false)
begin
- p = XML::Parser.new
- p.string = xml
+ p = XML::Parser.string(xml)
doc = p.parse
doc.find('//osm/relation').each do |pt|
return Relation.from_xml_node(pt, create)
end
- rescue LibXML::XML::Error => ex
+ 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
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']
-
- if create
- relation.timestamp = Time.now
- 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
#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'], member['ref'], member['role'])
+ relation.add_member(member['type'].classify, member['ref'], member['role'])
end
raise OSM::APIBadUserInput.new("Some bad xml in relation") if relation.nil?
return doc
end
- def to_xml_node(user_display_name_cache = nil)
+ 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
el1['version'] = self.version.to_s
el1['changeset'] = self.changeset_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)
+ if changeset_cache.key?(self.changeset_id)
+ # use the cache if available
+ else
+ changeset_cache[self.changeset_id] = self.changeset.user_id
+ end
+
+ user_id = changeset_cache[self.changeset_id]
+
+ if user_display_name_cache.key?(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
+ user_display_name_cache[user_id] = self.changeset.user.display_name
else
- user_display_name_cache[self.changeset.user_id] = nil
+ user_display_name_cache[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
+ if not user_display_name_cache[user_id].nil?
+ el1['user'] = user_display_name_cache[user_id]
+ el1['uid'] = user_id.to_s
end
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
+ e['type'] = member.member_type.downcase
e['ref'] = member.member_id.to_s
e['role'] = member.member_role
el1 << e
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 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
-
# FIXME is this really needed?
def members
unless @members
def add_member(type,id,role)
@members = Array.new unless @members
- @members += [[type,id,role]]
+ @members += [[type,id.to_i,role]]
end
def add_tag_keyval(k, v)
# duplicate tags are now forbidden, so we can't allow values
# in the hash to be overwritten.
- raise OSM::APIDuplicateTagsError.new if @tags.include? k
+ raise OSM::APIDuplicateTagsError.new("relation", self.id, k) if @tags.include? k
@tags[k] = v
end
+ ##
+ # updates the changeset bounding box to contain the bounding box of
+ # the element with given +type+ and +id+. this only works with nodes
+ # and ways at the moment, as they're the only elements to respond to
+ # the :bbox call.
+ def update_changeset_element(type, id)
+ element = Kernel.const_get(type.capitalize).find(id)
+ changeset.update_bbox! element.bbox
+ end
+
+ def delete_with_history!(new_relation, user)
+ unless self.visible
+ 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
+ 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 = []
+ self.visible = false
+ save_with_history!
+ end
+ end
+
+ def update_from(new_relation, user)
+ 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
+ end
+
+ def create_with_history(user)
+ check_create_consistency(self, user)
+ 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?(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
+ # relevant hash table, with the value true as a cache.
+ # Thus if you have nodes with the ids of 50 and 1 already in 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
+ 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.where(:id => m[1]).first
+
+ # and check that it is OK to use.
+ unless element and element.visible? and element.preconditions_ok?
+ 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
+ end
+
+ # Temporary method to match interface to nodes
+ def tags_as_hash
+ return self.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
+ # to IDs +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 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]
+ end
+ end
+ end
+
+ private
+
def save_with_history!
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
+ t = Time.now.getutc
self.version += 1
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
-
+
# 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|
+ 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
end
end
- ##
- # updates the changeset bounding box to contain the bounding box of
- # the element with given +type+ and +id+. this only works with nodes
- # and ways at the moment, as they're the only elements to respond to
- # the :bbox call.
- def update_changeset_element(type, id)
- element = Kernel.const_get(type.capitalize).find(id)
- changeset.update_bbox! element.bbox
- end
-
- def delete_with_history!(new_relation, user)
- if self.visible
- 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
- self.changeset_id = new_relation.changeset_id
- self.tags = {}
- self.members = []
- self.visible = false
- save_with_history!
- else
- raise OSM::APIAlreadyDeletedError.new
- end
- end
-
- def update_from(new_relation, user)
- check_consistency(self, new_relation, user)
- if !new_relation.preconditions_ok?
- raise OSM::APIPreconditionFailedError.new
- end
- self.changeset_id = new_relation.changeset_id
- 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
- end
- self.version = 0
- self.visible = true
- save_with_history!
- end
-
- def preconditions_ok?
- # 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
- # relevant hash table, with the value true as a cache.
- # Thus if you have nodes with the ids of 50 and 1 already in the
- # relation, then the hash table nodes would contain:
- # => {50=>true, 1=>true}
- elements = { :node => Hash.new, :way => Hash.new, :relation => Hash.new }
- self.members.each do |m|
- # find the hash for the element type or die
- hash = elements[m[0].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])
-
- # and check that it is OK to use.
- unless element and element.visible? and element.preconditions_ok?
- return false
- end
- hash[m[1]] = true
- end
- end
-
- return true
- rescue
- return false
- end
-
- # Temporary method to match interface to nodes
- def tags_as_hash
- return self.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
- # to IDs +id_map+.
- def fix_placeholders!(id_map)
- self.members.map! do |type, id, role|
- old_id = id.to_i
- if old_id < 0
- new_id = id_map[type.to_sym][old_id]
- raise "invalid placeholder" if new_id.nil?
- [type, new_id, role]
- else
- [type, id, role]
- end
- end
- end
-
end
projects / rails.git / blobdiff