+
+ def ensure_serialized_attribute_type
+ # Specifying a type in the "serialize" declaration causes rails to
+ # raise an exception if a different data type is retrieved from
+ # the database during load(). The validation preventing such
+ # crash-inducing records from being inserted in the database in
+ # the first place seems to have been left as an exercise to the
+ # developer.
+ self.class.serialized_attributes.each do |colname, attr|
+ if attr.object_class
+ unless self.attributes[colname].is_a? attr.object_class
+ self.errors.add colname.to_sym, "must be a #{attr.object_class.to_s}"
+ end
+ end
+ end
+ end