所需文件
- abstract_controller
- action_dispatch
- action_controller/deprecator
- action_controller/metal/strong_parameters
- action_controller/metal/exceptions
- active_support/core_ext/module/attribute_accessors
- active_support/core_ext/module/attr_internal
- active_support/core_ext/name_error
- active_support/inflector
命名空间