From f6b65b4d9510cdf0e4d126679236d6d6419ca56d Mon Sep 17 00:00:00 2001
From: Nikita Bulai <bulaj.nikita@gmail.com>
Date: Thu, 4 Oct 2018 11:38:16 +0300
Subject: [PATCH] [ci skip] News entry

---
 NEWS.md                                               | 1 +
 lib/doorkeeper/errors.rb                              | 2 ++
 lib/doorkeeper/grape/authorization_decorator.rb       | 2 ++
 lib/doorkeeper/grape/helpers.rb                       | 2 ++
 lib/doorkeeper/helpers/controller.rb                  | 2 ++
 lib/doorkeeper/models/access_grant_mixin.rb           | 2 ++
 lib/doorkeeper/models/access_token_mixin.rb           | 2 ++
 lib/doorkeeper/models/application_mixin.rb            | 2 ++
 lib/doorkeeper/models/concerns/accessible.rb          | 2 ++
 lib/doorkeeper/models/concerns/expirable.rb           | 2 ++
 lib/doorkeeper/models/concerns/orderable.rb           | 2 ++
 lib/doorkeeper/models/concerns/ownership.rb           | 2 ++
 lib/doorkeeper/models/concerns/revocable.rb           | 2 ++
 lib/doorkeeper/models/concerns/scopes.rb              | 2 ++
 lib/doorkeeper/oauth/authorization/code.rb            | 2 ++
 lib/doorkeeper/oauth/authorization/context.rb         | 2 ++
 lib/doorkeeper/oauth/authorization/token.rb           | 2 ++
 lib/doorkeeper/oauth/authorization/uri_builder.rb     | 2 ++
 lib/doorkeeper/oauth/authorization_code_request.rb    | 2 ++
 lib/doorkeeper/oauth/base_request.rb                  | 2 ++
 lib/doorkeeper/oauth/base_response.rb                 | 2 ++
 lib/doorkeeper/oauth/client.rb                        | 2 ++
 lib/doorkeeper/oauth/client/credentials.rb            | 2 ++
 lib/doorkeeper/oauth/client_credentials/creator.rb    | 2 ++
 lib/doorkeeper/oauth/client_credentials/issuer.rb     | 2 ++
 lib/doorkeeper/oauth/client_credentials/validation.rb | 2 ++
 lib/doorkeeper/oauth/client_credentials_request.rb    | 2 ++
 lib/doorkeeper/oauth/code_request.rb                  | 2 ++
 lib/doorkeeper/oauth/code_response.rb                 | 2 ++
 lib/doorkeeper/oauth/error.rb                         | 2 ++
 lib/doorkeeper/oauth/error_response.rb                | 2 ++
 lib/doorkeeper/oauth/forbidden_token_response.rb      | 2 ++
 lib/doorkeeper/oauth/helpers/scope_checker.rb         | 2 ++
 lib/doorkeeper/oauth/helpers/unique_token.rb          | 2 ++
 lib/doorkeeper/oauth/helpers/uri_checker.rb           | 2 ++
 lib/doorkeeper/oauth/invalid_token_response.rb        | 2 ++
 lib/doorkeeper/oauth/password_access_token_request.rb | 2 ++
 lib/doorkeeper/oauth/pre_authorization.rb             | 2 ++
 lib/doorkeeper/oauth/refresh_token_request.rb         | 2 ++
 lib/doorkeeper/oauth/scopes.rb                        | 2 ++
 lib/doorkeeper/oauth/token.rb                         | 2 ++
 lib/doorkeeper/oauth/token_introspection.rb           | 2 ++
 lib/doorkeeper/oauth/token_request.rb                 | 2 ++
 lib/doorkeeper/oauth/token_response.rb                | 2 ++
 lib/doorkeeper/orm/active_record.rb                   | 2 ++
 lib/doorkeeper/rails/helpers.rb                       | 2 ++
 lib/doorkeeper/rails/routes.rb                        | 2 ++
 lib/doorkeeper/rails/routes/mapper.rb                 | 2 ++
 lib/doorkeeper/rails/routes/mapping.rb                | 2 ++
 lib/doorkeeper/request.rb                             | 2 ++
 lib/doorkeeper/request/authorization_code.rb          | 2 ++
 lib/doorkeeper/request/client_credentials.rb          | 2 ++
 lib/doorkeeper/request/code.rb                        | 2 ++
 lib/doorkeeper/request/password.rb                    | 2 ++
 lib/doorkeeper/request/refresh_token.rb               | 2 ++
 lib/doorkeeper/request/strategy.rb                    | 2 ++
 lib/doorkeeper/request/token.rb                       | 2 ++
 lib/doorkeeper/server.rb                              | 2 ++
 lib/doorkeeper/stale_records_cleaner.rb               | 2 ++
 lib/doorkeeper/validations.rb                         | 2 ++
 lib/doorkeeper/version.rb                             | 2 ++
 61 files changed, 121 insertions(+)

diff --git a/NEWS.md b/NEWS.md
index 4a36c9266..ffe1a2300 100644
--- a/NEWS.md
+++ b/NEWS.md
@@ -12,6 +12,7 @@ User-visible changes worth mentioning.
   triggers every time)
 - [#1149] Fix for `URIChecker#valid_for_authorization?` false negative when query is blank, but `?` present.
 - [#1151] Fix Refresh Token strategy: add proper validation of client credentials both for Public & Private clients.
+- [#1154] Refactor `StaleRecordsCleaner` to be ORM agnostic.
 
 ## 5.0.0
 
diff --git a/lib/doorkeeper/errors.rb b/lib/doorkeeper/errors.rb
index 10a2d41e5..0a73f3a85 100644
--- a/lib/doorkeeper/errors.rb
+++ b/lib/doorkeeper/errors.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Errors
     class DoorkeeperError < StandardError
diff --git a/lib/doorkeeper/grape/authorization_decorator.rb b/lib/doorkeeper/grape/authorization_decorator.rb
index f5b71a398..414fc4156 100644
--- a/lib/doorkeeper/grape/authorization_decorator.rb
+++ b/lib/doorkeeper/grape/authorization_decorator.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Grape
     class AuthorizationDecorator < SimpleDelegator
diff --git a/lib/doorkeeper/grape/helpers.rb b/lib/doorkeeper/grape/helpers.rb
index 0ed73e8bc..31da6b1f1 100644
--- a/lib/doorkeeper/grape/helpers.rb
+++ b/lib/doorkeeper/grape/helpers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'doorkeeper/grape/authorization_decorator'
 
 module Doorkeeper
diff --git a/lib/doorkeeper/helpers/controller.rb b/lib/doorkeeper/helpers/controller.rb
index ea3449529..e71a4f319 100644
--- a/lib/doorkeeper/helpers/controller.rb
+++ b/lib/doorkeeper/helpers/controller.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 # Define methods that can be called in any controller that inherits from
 # Doorkeeper::ApplicationMetalController or Doorkeeper::ApplicationController
 module Doorkeeper
diff --git a/lib/doorkeeper/models/access_grant_mixin.rb b/lib/doorkeeper/models/access_grant_mixin.rb
index 2665db1bc..e016b28e5 100644
--- a/lib/doorkeeper/models/access_grant_mixin.rb
+++ b/lib/doorkeeper/models/access_grant_mixin.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module AccessGrantMixin
     extend ActiveSupport::Concern
diff --git a/lib/doorkeeper/models/access_token_mixin.rb b/lib/doorkeeper/models/access_token_mixin.rb
index 71dcb611b..098d6ed98 100644
--- a/lib/doorkeeper/models/access_token_mixin.rb
+++ b/lib/doorkeeper/models/access_token_mixin.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module AccessTokenMixin
     extend ActiveSupport::Concern
diff --git a/lib/doorkeeper/models/application_mixin.rb b/lib/doorkeeper/models/application_mixin.rb
index 10c871610..a8bfdd994 100644
--- a/lib/doorkeeper/models/application_mixin.rb
+++ b/lib/doorkeeper/models/application_mixin.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module ApplicationMixin
     extend ActiveSupport::Concern
diff --git a/lib/doorkeeper/models/concerns/accessible.rb b/lib/doorkeeper/models/concerns/accessible.rb
index f2f0044f9..a0bc125f6 100644
--- a/lib/doorkeeper/models/concerns/accessible.rb
+++ b/lib/doorkeeper/models/concerns/accessible.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Models
     module Accessible
diff --git a/lib/doorkeeper/models/concerns/expirable.rb b/lib/doorkeeper/models/concerns/expirable.rb
index 541a09931..2b7721294 100644
--- a/lib/doorkeeper/models/concerns/expirable.rb
+++ b/lib/doorkeeper/models/concerns/expirable.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Models
     module Expirable
diff --git a/lib/doorkeeper/models/concerns/orderable.rb b/lib/doorkeeper/models/concerns/orderable.rb
index 072c8c42c..6d5938839 100644
--- a/lib/doorkeeper/models/concerns/orderable.rb
+++ b/lib/doorkeeper/models/concerns/orderable.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Models
     module Orderable
diff --git a/lib/doorkeeper/models/concerns/ownership.rb b/lib/doorkeeper/models/concerns/ownership.rb
index 535e4622b..22ab88493 100644
--- a/lib/doorkeeper/models/concerns/ownership.rb
+++ b/lib/doorkeeper/models/concerns/ownership.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Models
     module Ownership
diff --git a/lib/doorkeeper/models/concerns/revocable.rb b/lib/doorkeeper/models/concerns/revocable.rb
index fac80c217..24159c9f6 100644
--- a/lib/doorkeeper/models/concerns/revocable.rb
+++ b/lib/doorkeeper/models/concerns/revocable.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Models
     module Revocable
diff --git a/lib/doorkeeper/models/concerns/scopes.rb b/lib/doorkeeper/models/concerns/scopes.rb
index 8d0788c11..4f475dcb4 100644
--- a/lib/doorkeeper/models/concerns/scopes.rb
+++ b/lib/doorkeeper/models/concerns/scopes.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Models
     module Scopes
diff --git a/lib/doorkeeper/oauth/authorization/code.rb b/lib/doorkeeper/oauth/authorization/code.rb
index 960662e5e..73e631f5a 100644
--- a/lib/doorkeeper/oauth/authorization/code.rb
+++ b/lib/doorkeeper/oauth/authorization/code.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     module Authorization
diff --git a/lib/doorkeeper/oauth/authorization/context.rb b/lib/doorkeeper/oauth/authorization/context.rb
index 1281d576e..b0524214b 100644
--- a/lib/doorkeeper/oauth/authorization/context.rb
+++ b/lib/doorkeeper/oauth/authorization/context.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     module Authorization
diff --git a/lib/doorkeeper/oauth/authorization/token.rb b/lib/doorkeeper/oauth/authorization/token.rb
index e881df4c4..a022b926c 100644
--- a/lib/doorkeeper/oauth/authorization/token.rb
+++ b/lib/doorkeeper/oauth/authorization/token.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     module Authorization
diff --git a/lib/doorkeeper/oauth/authorization/uri_builder.rb b/lib/doorkeeper/oauth/authorization/uri_builder.rb
index d8546aa42..bb6ce20fd 100644
--- a/lib/doorkeeper/oauth/authorization/uri_builder.rb
+++ b/lib/doorkeeper/oauth/authorization/uri_builder.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'rack/utils'
 
 module Doorkeeper
diff --git a/lib/doorkeeper/oauth/authorization_code_request.rb b/lib/doorkeeper/oauth/authorization_code_request.rb
index f4c3eed45..b93fac8c7 100644
--- a/lib/doorkeeper/oauth/authorization_code_request.rb
+++ b/lib/doorkeeper/oauth/authorization_code_request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class AuthorizationCodeRequest < BaseRequest
diff --git a/lib/doorkeeper/oauth/base_request.rb b/lib/doorkeeper/oauth/base_request.rb
index 636e42346..573b128e4 100644
--- a/lib/doorkeeper/oauth/base_request.rb
+++ b/lib/doorkeeper/oauth/base_request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class BaseRequest
diff --git a/lib/doorkeeper/oauth/base_response.rb b/lib/doorkeeper/oauth/base_response.rb
index dd7c1bebd..84c29f640 100644
--- a/lib/doorkeeper/oauth/base_response.rb
+++ b/lib/doorkeeper/oauth/base_response.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class BaseResponse
diff --git a/lib/doorkeeper/oauth/client.rb b/lib/doorkeeper/oauth/client.rb
index d8ce77e17..3a31b0531 100644
--- a/lib/doorkeeper/oauth/client.rb
+++ b/lib/doorkeeper/oauth/client.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class Client
diff --git a/lib/doorkeeper/oauth/client/credentials.rb b/lib/doorkeeper/oauth/client/credentials.rb
index 62cc8dac5..d9b69e4c7 100644
--- a/lib/doorkeeper/oauth/client/credentials.rb
+++ b/lib/doorkeeper/oauth/client/credentials.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class Client
diff --git a/lib/doorkeeper/oauth/client_credentials/creator.rb b/lib/doorkeeper/oauth/client_credentials/creator.rb
index 09ad284d5..287c979b8 100644
--- a/lib/doorkeeper/oauth/client_credentials/creator.rb
+++ b/lib/doorkeeper/oauth/client_credentials/creator.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class ClientCredentialsRequest < BaseRequest
diff --git a/lib/doorkeeper/oauth/client_credentials/issuer.rb b/lib/doorkeeper/oauth/client_credentials/issuer.rb
index 7c8edaf57..f9bb67b13 100644
--- a/lib/doorkeeper/oauth/client_credentials/issuer.rb
+++ b/lib/doorkeeper/oauth/client_credentials/issuer.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class ClientCredentialsRequest < BaseRequest
diff --git a/lib/doorkeeper/oauth/client_credentials/validation.rb b/lib/doorkeeper/oauth/client_credentials/validation.rb
index 964f97b89..fadd62933 100644
--- a/lib/doorkeeper/oauth/client_credentials/validation.rb
+++ b/lib/doorkeeper/oauth/client_credentials/validation.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class ClientCredentialsRequest < BaseRequest
diff --git a/lib/doorkeeper/oauth/client_credentials_request.rb b/lib/doorkeeper/oauth/client_credentials_request.rb
index f9df39d65..05422b078 100644
--- a/lib/doorkeeper/oauth/client_credentials_request.rb
+++ b/lib/doorkeeper/oauth/client_credentials_request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class ClientCredentialsRequest < BaseRequest
diff --git a/lib/doorkeeper/oauth/code_request.rb b/lib/doorkeeper/oauth/code_request.rb
index a81f4b8c7..b7583dcaa 100644
--- a/lib/doorkeeper/oauth/code_request.rb
+++ b/lib/doorkeeper/oauth/code_request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class CodeRequest
diff --git a/lib/doorkeeper/oauth/code_response.rb b/lib/doorkeeper/oauth/code_response.rb
index 83cc32f19..cf193c931 100644
--- a/lib/doorkeeper/oauth/code_response.rb
+++ b/lib/doorkeeper/oauth/code_response.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class CodeResponse < BaseResponse
diff --git a/lib/doorkeeper/oauth/error.rb b/lib/doorkeeper/oauth/error.rb
index 93505ccf5..a6c99fb0f 100644
--- a/lib/doorkeeper/oauth/error.rb
+++ b/lib/doorkeeper/oauth/error.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     Error = Struct.new(:name, :state) do
diff --git a/lib/doorkeeper/oauth/error_response.rb b/lib/doorkeeper/oauth/error_response.rb
index 1fb7549ff..afcc561aa 100644
--- a/lib/doorkeeper/oauth/error_response.rb
+++ b/lib/doorkeeper/oauth/error_response.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class ErrorResponse < BaseResponse
diff --git a/lib/doorkeeper/oauth/forbidden_token_response.rb b/lib/doorkeeper/oauth/forbidden_token_response.rb
index d87ce0aae..ed004d4c2 100644
--- a/lib/doorkeeper/oauth/forbidden_token_response.rb
+++ b/lib/doorkeeper/oauth/forbidden_token_response.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class ForbiddenTokenResponse < ErrorResponse
diff --git a/lib/doorkeeper/oauth/helpers/scope_checker.rb b/lib/doorkeeper/oauth/helpers/scope_checker.rb
index 3cf853e08..c1754eceb 100644
--- a/lib/doorkeeper/oauth/helpers/scope_checker.rb
+++ b/lib/doorkeeper/oauth/helpers/scope_checker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     module Helpers
diff --git a/lib/doorkeeper/oauth/helpers/unique_token.rb b/lib/doorkeeper/oauth/helpers/unique_token.rb
index f506a85da..13f012596 100644
--- a/lib/doorkeeper/oauth/helpers/unique_token.rb
+++ b/lib/doorkeeper/oauth/helpers/unique_token.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     module Helpers
diff --git a/lib/doorkeeper/oauth/helpers/uri_checker.rb b/lib/doorkeeper/oauth/helpers/uri_checker.rb
index eda3d3859..7cb7f1db2 100644
--- a/lib/doorkeeper/oauth/helpers/uri_checker.rb
+++ b/lib/doorkeeper/oauth/helpers/uri_checker.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     module Helpers
diff --git a/lib/doorkeeper/oauth/invalid_token_response.rb b/lib/doorkeeper/oauth/invalid_token_response.rb
index 8e507f95c..8034d169e 100644
--- a/lib/doorkeeper/oauth/invalid_token_response.rb
+++ b/lib/doorkeeper/oauth/invalid_token_response.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class InvalidTokenResponse < ErrorResponse
diff --git a/lib/doorkeeper/oauth/password_access_token_request.rb b/lib/doorkeeper/oauth/password_access_token_request.rb
index 5f6aac605..9d2b088fd 100644
--- a/lib/doorkeeper/oauth/password_access_token_request.rb
+++ b/lib/doorkeeper/oauth/password_access_token_request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class PasswordAccessTokenRequest < BaseRequest
diff --git a/lib/doorkeeper/oauth/pre_authorization.rb b/lib/doorkeeper/oauth/pre_authorization.rb
index 9ec0a1a69..64a22bb35 100644
--- a/lib/doorkeeper/oauth/pre_authorization.rb
+++ b/lib/doorkeeper/oauth/pre_authorization.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class PreAuthorization
diff --git a/lib/doorkeeper/oauth/refresh_token_request.rb b/lib/doorkeeper/oauth/refresh_token_request.rb
index af80850d2..b033131d4 100644
--- a/lib/doorkeeper/oauth/refresh_token_request.rb
+++ b/lib/doorkeeper/oauth/refresh_token_request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class RefreshTokenRequest < BaseRequest
diff --git a/lib/doorkeeper/oauth/scopes.rb b/lib/doorkeeper/oauth/scopes.rb
index 5da0a5342..1865c621c 100644
--- a/lib/doorkeeper/oauth/scopes.rb
+++ b/lib/doorkeeper/oauth/scopes.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class Scopes
diff --git a/lib/doorkeeper/oauth/token.rb b/lib/doorkeeper/oauth/token.rb
index 36fb581b8..c3a9d672f 100644
--- a/lib/doorkeeper/oauth/token.rb
+++ b/lib/doorkeeper/oauth/token.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class Token
diff --git a/lib/doorkeeper/oauth/token_introspection.rb b/lib/doorkeeper/oauth/token_introspection.rb
index 26a63de48..a87371ccd 100644
--- a/lib/doorkeeper/oauth/token_introspection.rb
+++ b/lib/doorkeeper/oauth/token_introspection.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     # RFC7662 OAuth 2.0 Token Introspection
diff --git a/lib/doorkeeper/oauth/token_request.rb b/lib/doorkeeper/oauth/token_request.rb
index 9908c23ef..b8aa38429 100644
--- a/lib/doorkeeper/oauth/token_request.rb
+++ b/lib/doorkeeper/oauth/token_request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class TokenRequest
diff --git a/lib/doorkeeper/oauth/token_response.rb b/lib/doorkeeper/oauth/token_response.rb
index 93f6bbe7e..aa3c31119 100644
--- a/lib/doorkeeper/oauth/token_response.rb
+++ b/lib/doorkeeper/oauth/token_response.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module OAuth
     class TokenResponse
diff --git a/lib/doorkeeper/orm/active_record.rb b/lib/doorkeeper/orm/active_record.rb
index 5cda5f1ab..0cbb4f94b 100644
--- a/lib/doorkeeper/orm/active_record.rb
+++ b/lib/doorkeeper/orm/active_record.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'active_support/lazy_load_hooks'
 
 require 'doorkeeper/orm/active_record/stale_records_cleaner'
diff --git a/lib/doorkeeper/rails/helpers.rb b/lib/doorkeeper/rails/helpers.rb
index 780bcf5cd..70c9b0148 100644
--- a/lib/doorkeeper/rails/helpers.rb
+++ b/lib/doorkeeper/rails/helpers.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Rails
     module Helpers
diff --git a/lib/doorkeeper/rails/routes.rb b/lib/doorkeeper/rails/routes.rb
index a44b2df99..cd88e4139 100644
--- a/lib/doorkeeper/rails/routes.rb
+++ b/lib/doorkeeper/rails/routes.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 require 'doorkeeper/rails/routes/mapping'
 require 'doorkeeper/rails/routes/mapper'
 
diff --git a/lib/doorkeeper/rails/routes/mapper.rb b/lib/doorkeeper/rails/routes/mapper.rb
index bfee19b52..7ec5fd75b 100644
--- a/lib/doorkeeper/rails/routes/mapper.rb
+++ b/lib/doorkeeper/rails/routes/mapper.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Rails
     class Routes # :nodoc:
diff --git a/lib/doorkeeper/rails/routes/mapping.rb b/lib/doorkeeper/rails/routes/mapping.rb
index d2f129ce1..71b543972 100644
--- a/lib/doorkeeper/rails/routes/mapping.rb
+++ b/lib/doorkeeper/rails/routes/mapping.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Rails
     class Routes # :nodoc:
diff --git a/lib/doorkeeper/request.rb b/lib/doorkeeper/request.rb
index f1b231762..e8366b651 100644
--- a/lib/doorkeeper/request.rb
+++ b/lib/doorkeeper/request.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Request
     class << self
diff --git a/lib/doorkeeper/request/authorization_code.rb b/lib/doorkeeper/request/authorization_code.rb
index 51cf3abe5..d4a46a3ee 100644
--- a/lib/doorkeeper/request/authorization_code.rb
+++ b/lib/doorkeeper/request/authorization_code.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Request
     class AuthorizationCode < Strategy
diff --git a/lib/doorkeeper/request/client_credentials.rb b/lib/doorkeeper/request/client_credentials.rb
index d05f39916..00d89ff3d 100644
--- a/lib/doorkeeper/request/client_credentials.rb
+++ b/lib/doorkeeper/request/client_credentials.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Request
     class ClientCredentials < Strategy
diff --git a/lib/doorkeeper/request/code.rb b/lib/doorkeeper/request/code.rb
index 39782b0f2..d4cadb5d0 100644
--- a/lib/doorkeeper/request/code.rb
+++ b/lib/doorkeeper/request/code.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Request
     class Code < Strategy
diff --git a/lib/doorkeeper/request/password.rb b/lib/doorkeeper/request/password.rb
index 9ee966424..4f1379d2c 100644
--- a/lib/doorkeeper/request/password.rb
+++ b/lib/doorkeeper/request/password.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Request
     class Password < Strategy
diff --git a/lib/doorkeeper/request/refresh_token.rb b/lib/doorkeeper/request/refresh_token.rb
index cfc5ace52..c47ce6b14 100644
--- a/lib/doorkeeper/request/refresh_token.rb
+++ b/lib/doorkeeper/request/refresh_token.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Request
     class RefreshToken < Strategy
diff --git a/lib/doorkeeper/request/strategy.rb b/lib/doorkeeper/request/strategy.rb
index ecf6f4157..a4f379ba8 100644
--- a/lib/doorkeeper/request/strategy.rb
+++ b/lib/doorkeeper/request/strategy.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Request
     class Strategy
diff --git a/lib/doorkeeper/request/token.rb b/lib/doorkeeper/request/token.rb
index 93528d992..4e609835d 100644
--- a/lib/doorkeeper/request/token.rb
+++ b/lib/doorkeeper/request/token.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Request
     class Token < Strategy
diff --git a/lib/doorkeeper/server.rb b/lib/doorkeeper/server.rb
index 697c2d903..2fa8fadea 100644
--- a/lib/doorkeeper/server.rb
+++ b/lib/doorkeeper/server.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   class Server
     attr_accessor :context
diff --git a/lib/doorkeeper/stale_records_cleaner.rb b/lib/doorkeeper/stale_records_cleaner.rb
index 5c9c6efbd..45c2b5669 100644
--- a/lib/doorkeeper/stale_records_cleaner.rb
+++ b/lib/doorkeeper/stale_records_cleaner.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   class StaleRecordsCleaner
     CLEANER_CLASS = 'StaleRecordsCleaner'.freeze
diff --git a/lib/doorkeeper/validations.rb b/lib/doorkeeper/validations.rb
index 1fe8e5bab..d82ced79e 100644
--- a/lib/doorkeeper/validations.rb
+++ b/lib/doorkeeper/validations.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   module Validations
     extend ActiveSupport::Concern
diff --git a/lib/doorkeeper/version.rb b/lib/doorkeeper/version.rb
index af5e4cecc..5f2da8dad 100644
--- a/lib/doorkeeper/version.rb
+++ b/lib/doorkeeper/version.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 module Doorkeeper
   def self.gem_version
     Gem::Version.new VERSION::STRING