+
+ def foreign_key_attributes
+ attributes.keys.select { |a| a.match /_uuid$/ }
+ end
+
+ def normalize_collection_uuids
+ foreign_key_attributes.each do |attr|
+ attr_value = send attr
+ if attr_value.is_a? String and
+ attr_value.match /^[0-9a-f]{32,}(\+[@\w]+)*$/
+ begin
+ send "#{attr}=", Collection.normalize_uuid(attr_value)
+ rescue
+ # TODO: abort instead of silently accepting unnormalizable value?
+ end
+ end
+ end
+ end
+
+ @@UUID_REGEX = /^[0-9a-z]{5}-([0-9a-z]{5})-[0-9a-z]{15}$/
+
+ def ensure_valid_uuids
+ specials = [system_user_uuid, 'd41d8cd98f00b204e9800998ecf8427e+0']
+
+ foreign_key_attributes.each do |attr|
+ next if attr == "modified_by_client_uuid"
+ begin
+ attr_value = send attr
+ r = ArvadosModel::resource_class_for_uuid attr_value if attr_value
+ if r and r.readable_by(current_user).where(uuid: attr_value).count == 0 and not specials.include? attr_value
+ errors.add(attr, "'#{attr_value}' not found")
+ end
+ rescue Exception => e
+ errors.add(attr, "'#{attr_value}' error #{e}")
+ end
+ end
+ end
+
+ def self.resource_class_for_uuid(uuid)
+ if uuid.is_a? ArvadosModel
+ return uuid.class
+ end
+ unless uuid.is_a? String
+ return nil
+ end
+ if uuid.match /^[0-9a-f]{32}(\+[^,]+)*(,[0-9a-f]{32}(\+[^,]+)*)*$/
+ return Collection
+ end
+ resource_class = nil
+
+ Rails.application.eager_load!
+ uuid.match @@UUID_REGEX do |re|
+ ActiveRecord::Base.descendants.reject(&:abstract_class?).each do |k|
+ if k.respond_to?(:uuid_prefix)
+ if k.uuid_prefix == re[1]
+ return k
+ end
+ end
+ end
+ end
+ nil
+ end
+