[SOLVED] ActionController::API vs ActionController::Base

ActionController::API vs ActionController::Base

I want to know what all functionalities are restricted in API and will there be any difference in speed if we use Base in place of API.

I searched many places to find the difference between those two modules, all I was able to know it API is light weight version of Base.

Solution

The best source to understand the differences between both is certainly the list of modules they include in the source code.

Which ActionController::Base includes these modules (comments removed and sorted alphabetically):

MODULES = [
  AbstractController::AssetPaths,
  AbstractController::Callbacks,
  AbstractController::Rendering,
  AbstractController::Translation,
  ActionView::Layouts,
  Caching,
  ConditionalGet,
  ContentSecurityPolicy,
  Cookies,
  DataStreaming,
  DefaultHeaders,
  EtagWithFlash,
  EtagWithTemplateDigest,
  Flash,
  FormBuilder,
  Helpers,
  HttpAuthentication::Basic::ControllerMethods,
  HttpAuthentication::Digest::ControllerMethods,
  HttpAuthentication::Token::ControllerMethods,
  ImplicitRender,
  Instrumentation,
  Logging,
  MimeResponds,
  ParameterEncoding,
  ParamsWrapper,
  PermissionsPolicy,
  Redirecting,
  Renderers::All,
  Rendering,
  RequestForgeryProtection,
  Rescue,
  Streaming,
  StrongParameters,
  UrlFor,
]

While ActionController::API only includes these (again, comments removed and sorted alphabetically):

MODULES = [
  AbstractController::Callbacks,
  AbstractController::Rendering,
  ApiRendering,
  BasicImplicitRender,
  ConditionalGet,
  DataStreaming,
  DefaultHeaders,
  Instrumentation,
  Logging,
  ParamsWrapper,
  Redirecting,
  Renderers::All,
  Rescue,
  StrongParameters,
  UrlFor,
]