# File lib/factory_girl/factory.rb, line 216 216: def callback(name, &block) 217: unless [:after_build, :after_create, :after_stub].include?(name.to_sym) 218: raise InvalidCallbackNameError, "#{name} is not a valid callback name. Valid callback names are :after_build, :after_create, and :after_stub" 219: end 220: @attributes << Attribute::Callback.new(name.to_sym, block) 221: end