def self.from_xml_node(pt, create=false)
relation = Relation.new
- if !create and pt['id'] != '0'
- relation.id = pt['id'].to_i
- end
-
- raise OSM::APIBadXMLError.new("relation", pt, "You are missing the required changeset in the relation") if pt['changeset'].nil?
+ 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']
-
- # 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']
+
+ 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
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