ActiveRecord::RecordNotFound とかだと勝手に404ページけどほかは何があるんだろうとか思ったのでメモ
環境
rails (5.2.0)
確認の仕方
ActionDispatch::ExceptionWrapper.rescue_responses # => {"ActionController::RoutingError"=>:not_found, # "AbstractController::ActionNotFound"=>:not_found, # "ActionController::MethodNotAllowed"=>:method_not_allowed, # "ActionController::UnknownHttpMethod"=>:method_not_allowed, # "ActionController::NotImplemented"=>:not_implemented, # "ActionController::UnknownFormat"=>:not_acceptable, # "ActionController::InvalidAuthenticityToken"=>:unprocessable_entity, # "ActionController::InvalidCrossOriginRequest"=>:unprocessable_entity, # "ActionDispatch::Http::Parameters::ParseError"=>:bad_request, # "ActionController::BadRequest"=>:bad_request, # "ActionController::ParameterMissing"=>:bad_request, # "Rack::QueryParser::ParameterTypeError"=>:bad_request, # "Rack::QueryParser::InvalidParameterError"=>:bad_request, # "ActiveRecord::RecordNotFound"=>:not_found, # "ActiveRecord::StaleObjectError"=>:conflict, # "ActiveRecord::RecordInvalid"=>:unprocessable_entity, # "ActiveRecord::RecordNotSaved"=>:unprocessable_entity}
ちなみに :bad_request などが何を示すかの原典はここらへんらしい
