validates_numericality_of :id, :on => :update, :integer_only => true
validates_associated :changeset
+ # Read in xml as text and return it's Way object representation
def self.from_xml(xml, create=false)
begin
p = XML::Parser.string(xml)
doc.find('//osm/way').each do |pt|
return Way.from_xml_node(pt, create)
end
+ raise OSM::APIBadXMLError.new("node", xml, "XML doesn't contain an osm/way element.")
rescue LibXML::XML::Error, ArgumentError => ex
raise OSM::APIBadXMLError.new("way", xml, ex.message)
end
def self.from_xml_node(pt, create=false)
way = Way.new
- if !create and pt['id'] != '0'
- way.id = pt['id'].to_i
- end
-
+ raise OSM::APIBadXMLError.new("way", pt, "Version is required when updating") unless create or not pt['version'].nil?
way.version = pt['version']
- raise OSM::APIBadXMLError.new("node", pt, "Changeset is required") if pt['changeset'].nil?
+ raise OSM::APIBadXMLError.new("way", pt, "Changeset id is missing") if pt['changeset'].nil?
way.changeset_id = pt['changeset']
- # This next section isn't required for the create, update, or delete of ways
- if create
- way.timestamp = Time.now.getutc
- way.visible = true
- else
- if pt['timestamp']
- way.timestamp = Time.parse(pt['timestamp'])
- end
- # if visible isn't present then it defaults to true
- way.visible = (pt['visible'] or true)
+ unless create
+ raise OSM::APIBadXMLError.new("way", pt, "ID is required when updating") if pt['id'].nil?
+ way.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 way cannot be zero when updating.") if way.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.
+ way.visible = true
+
pt.find('tag').each do |tag|
+ raise OSM::APIBadXMLError.new("way", pt, "tag is missing key") if tag['k'].nil?
+ raise OSM::APIBadXMLError.new("way", pt, "tag is missing value") if tag['v'].nil?
way.add_tag_keyval(tag['k'], tag['v'])
end
end
def update_from(new_way, user)
- check_consistency(self, new_way, user)
- unless new_way.preconditions_ok?
- raise OSM::APIPreconditionFailedError.new("Cannot update way #{self.id}: data is invalid.")
+ Way.transaction do
+ self.lock!
+ check_consistency(self, new_way, user)
+ unless new_way.preconditions_ok?(self.nds)
+ raise OSM::APIPreconditionFailedError.new("Cannot update way #{self.id}: data is invalid.")
+ end
+
+ self.changeset_id = new_way.changeset_id
+ self.changeset = new_way.changeset
+ self.tags = new_way.tags
+ self.nds = new_way.nds
+ self.visible = true
+ save_with_history!
end
-
- self.changeset_id = new_way.changeset_id
- self.changeset = new_way.changeset
- self.tags = new_way.tags
- self.nds = new_way.nds
- self.visible = true
- save_with_history!
end
def create_with_history(user)
save_with_history!
end
- def preconditions_ok?
+ def preconditions_ok?(old_nodes = [])
return false if self.nds.empty?
if self.nds.length > APP_CONFIG['max_number_of_way_nodes']
- raise OSM::APITooManyWayNodesError.new(self.nds.length, APP_CONFIG['max_number_of_way_nodes'])
+ raise OSM::APITooManyWayNodesError.new(self.id, self.nds.length, APP_CONFIG['max_number_of_way_nodes'])
end
- self.nds.each do |n|
- node = Node.find(:first, :conditions => ["id = ?", n])
- unless node and node.visible
- raise OSM::APIPreconditionFailedError.new("The node with id #{n} either does not exist, or is not visible")
+
+ # check only the new nodes, for efficiency - old nodes having been checked last time and can't
+ # be deleted when they're in-use.
+ new_nds = (self.nds - old_nodes).sort.uniq
+
+ unless new_nds.empty?
+ db_nds = Node.find(:all, :conditions => { :id => new_nds, :visible => true })
+
+ if db_nds.length < new_nds.length
+ missing = new_nds - db_nds.collect { |n| n.id }
+ raise OSM::APIPreconditionFailedError.new("Way #{self.id} requires the nodes with id in (#{missing.join(',')}), which either do not exist, or are not visible.")
end
end
+
return true
end
# provide repeatable reads for the used-by checks. this means it
# shouldn't be possible to get race conditions.
Way.transaction do
+ self.lock!
check_consistency(self, new_way, user)
- if RelationMember.find(:first, :joins => "INNER JOIN current_relations ON current_relations.id=current_relation_members.id",
+ rel = RelationMember.find(:first, :joins => :relation,
:conditions => [ "visible = ? AND member_type='Way' and member_id=? ", true, self.id])
- raise OSM::APIPreconditionFailedError.new("You need to make sure that the way with id: #{self.id} is not a member of a relation.")
- else
- self.changeset_id = new_way.changeset_id
- self.changeset = new_way.changeset
-
- self.tags = []
- self.nds = []
- self.visible = false
- save_with_history!
- end
+ raise OSM::APIPreconditionFailedError.new("Way #{self.id} still used by relation #{rel.relation.id}.") if rel
+
+ self.changeset_id = new_way.changeset_id
+ self.changeset = new_way.changeset
+
+ self.tags = []
+ self.nds = []
+ self.visible = false
+ save_with_history!
end
end
projects / rails.git / blobdiff