# File lib/active_record/validations.rb, line 804 def validates_associated(*attr_names) configuration = { :message => ActiveRecord::Errors.default_error_messages[:invalid], :on => :save } configuration.update(attr_names.extract_options!) validates_each(attr_names, configuration) do |record, attr_name, value| record.errors.add(attr_name, configuration[:message]) unless (value.is_a?(Array) ? value : [value]).inject(true) { |v, r| (r.nil? || r.valid?) && v } end end