diff --git a/.rubocop_todo.yml b/.rubocop_todo.yml
index ffef0173a4..38a28237c2 100644
--- a/.rubocop_todo.yml
+++ b/.rubocop_todo.yml
@@ -1,157 +1,398 @@
-# This configuration was generated by `rubocop --auto-gen-config`
-# on 2014-08-19 13:06:13 +0200 using RuboCop version 0.25.0.
+# This configuration was generated by
+# `rubocop --auto-gen-config`
+# on 2019-12-10 17:46:01 +0900 using RuboCop version 0.68.1.
 # The point is for the user to remove these configuration records
 # one by one as the offenses are removed from the code base.
 # Note that changes in the inspected code, or installation of new
 # versions of RuboCop, may require this file to be generated again.
 
+# Offense count: 35
+# Cop supports --auto-correct.
+# Configuration parameters: TreatCommentsAsGroupSeparators, Include.
+# Include: **/*.gemfile, **/Gemfile, **/gems.rb
 Bundler/OrderedGems:
-  Enabled: false
-
+  Exclude:
+    - 'Gemfile'
+    - 'gemfiles/rails_5.0.gemfile'
+    - 'gemfiles/rails_5.1.gemfile'
+    - 'gemfiles/rails_5.2.gemfile'
+    - 'gemfiles/rails_6.0.gemfile'
+    - 'spec/dummy_app/Gemfile'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: TreatCommentsAsGroupSeparators, Include.
+# Include: **/*.gemspec
 Gemspec/OrderedDependencies:
-  Enabled: false
-
-Gemspec/RequiredRubyVersion:
-  Enabled: false
+  Exclude:
+    - 'rails_admin.gemspec'
 
+# Offense count: 2
+# Cop supports --auto-correct.
 Layout/ClosingHeredocIndentation:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/adapters/mongoid/abstract_object.rb'
 
+# Offense count: 53
+# Cop supports --auto-correct.
 Layout/EmptyLineAfterGuardClause:
   Enabled: false
 
+# Offense count: 5
+# Cop supports --auto-correct.
 Layout/EmptyLineAfterMagicComment:
-  Enabled: false
-
+  Exclude:
+    - 'lib/rails_admin/support/csv_converter.rb'
+    - 'rails_admin.gemspec'
+    - 'spec/controllers/rails_admin/main_controller_spec.rb'
+    - 'spec/dummy_app/app/active_record/carrierwave_uploader.rb'
+    - 'spec/dummy_app/app/mongoid/carrierwave_uploader.rb'
+
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: auto_detection, squiggly, active_support, powerpack, unindent
 Layout/IndentHeredoc:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/engine.rb'
 
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: Width, IgnoredPatterns.
 Layout/IndentationWidth:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/adapters/mongoid.rb'
+    - 'spec/spec_helper.rb'
 
+# Offense count: 1
+# Cop supports --auto-correct.
 Layout/LeadingBlankLines:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/extension.rb'
 
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, EnforcedStyleForEmptyBraces.
+# SupportedStyles: space, no_space
+# SupportedStylesForEmptyBraces: space, no_space
 Layout/SpaceBeforeBlockBraces:
-  Enabled: false
+  Exclude:
+    - 'spec/rails_admin/install_generator_spec.rb'
 
+# Offense count: 1
 Lint/AmbiguousBlockAssociation:
-  Enabled: false
+  Exclude:
+    - 'spec/rails_admin/install_generator_spec.rb'
 
-# Offense count: 22
+# Offense count: 18
 # Configuration parameters: AllowSafeAssignment.
 Lint/AssignmentInCondition:
-  Enabled: false
-
+  Exclude:
+    - 'app/controllers/rails_admin/main_controller.rb'
+    - 'app/helpers/rails_admin/application_helper.rb'
+    - 'lib/rails_admin/abstract_model.rb'
+    - 'lib/rails_admin/adapters/active_record.rb'
+    - 'lib/rails_admin/config/actions/export.rb'
+    - 'lib/rails_admin/config/actions/index.rb'
+    - 'lib/rails_admin/config/actions/new.rb'
+    - 'lib/rails_admin/config/fields/factories/active_storage.rb'
+    - 'lib/rails_admin/config/fields/factories/association.rb'
+    - 'lib/rails_admin/config/fields/factories/carrierwave.rb'
+    - 'lib/rails_admin/config/fields/factories/devise.rb'
+    - 'lib/rails_admin/config/fields/factories/dragonfly.rb'
+    - 'lib/rails_admin/config/fields/factories/paperclip.rb'
+    - 'lib/rails_admin/config/fields/types/datetime.rb'
+    - 'spec/dummy_app/db/seeds.rb'
+
+# Offense count: 1
 Lint/DuplicateMethods:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/config.rb'
 
+# Offense count: 1
 Lint/ReturnInVoidContext:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/support/csv_converter.rb'
 
+# Offense count: 1
+# Cop supports --auto-correct.
 Lint/ScriptPermission:
-  Enabled: false
+  Exclude:
+    - 'spec/dummy_app/Rakefile'
 
+# Offense count: 2
+# Cop supports --auto-correct.
 Lint/UnneededSplatExpansion:
-  Enabled: false
+  Exclude:
+    - 'spec/rails_admin/adapters/active_record/association_spec.rb'
 
+# Offense count: 198
+# Configuration parameters: CountComments, ExcludedMethods.
+# ExcludedMethods: refine
 Metrics/BlockLength:
-  Exclude:
-    - spec/**/*.rb
-  Max: 51
+  Max: 1081
 
 # Offense count: 7
 Naming/AccessorMethodName:
-  Enabled: false
-
+  Exclude:
+    - 'app/controllers/rails_admin/application_controller.rb'
+    - 'app/controllers/rails_admin/main_controller.rb'
+    - 'lib/rails_admin/abstract_model.rb'
+    - 'lib/rails_admin/adapters/active_record/abstract_object.rb'
+
+# Offense count: 6
+# Configuration parameters: Blacklist.
+# Blacklist: (?-mix:(^|\s)(EO[A-Z]{1}|END)(\s|$))
 Naming/HeredocDelimiterNaming:
-  Enabled: false
-
+  Exclude:
+    - 'app/controllers/rails_admin/main_controller.rb'
+    - 'lib/rails_admin/adapters/mongoid.rb'
+    - 'lib/rails_admin/config/fields/base.rb'
+    - 'lib/rails_admin/engine.rb'
+    - 'lib/rails_admin/extensions/paper_trail/auditing_adapter.rb'
+    - 'spec/factories.rb'
+
+# Offense count: 2
+# Configuration parameters: EnforcedStyleForLeadingUnderscores.
+# SupportedStylesForLeadingUnderscores: disallowed, required, optional
 Naming/MemoizedInstanceVariableName:
-  Enabled: false
+  Exclude:
+    - 'app/controllers/rails_admin/application_controller.rb'
+    - 'lib/rails_admin/config/has_description.rb'
 
+# Offense count: 3
+# Configuration parameters: MinNameLength, AllowNamesEndingInNumbers, AllowedNames, ForbiddenNames.
+# AllowedNames: io, id, to, by, on, in, at, ip, db
 Naming/UncommunicativeMethodParamName:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/abstract_model.rb'
+    - 'lib/rails_admin/config/model.rb'
+    - 'spec/rails_admin/adapters/mongoid/property_spec.rb'
 
+# Offense count: 1
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: snake_case, normalcase, non_integer
 Naming/VariableNumber:
-  Enabled: false
+  Exclude:
+    - 'spec/helpers/rails_admin/application_helper_spec.rb'
 
 # Offense count: 11
 Style/ClassVars:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/abstract_model.rb'
+    - 'lib/rails_admin/config.rb'
+    - 'lib/rails_admin/config/actions.rb'
+    - 'lib/rails_admin/config/fields.rb'
+    - 'lib/rails_admin/config/fields/types.rb'
 
+# Offense count: 1
 Style/CommentedKeyword:
-  Enabled: false
-
-Style/ExpandPathArguments:
-  Enabled: false
+  Exclude:
+    - 'app/helpers/rails_admin/application_helper.rb'
 
+# Offense count: 2
 Style/EvalWithLocation:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/config/actions.rb'
 
+# Offense count: 15
+# Cop supports --auto-correct.
+Style/ExpandPathArguments:
+  Exclude:
+    - 'lib/generators/rails_admin/install_generator.rb'
+    - 'rails_admin.gemspec'
+    - 'spec/dummy_app/Rakefile'
+    - 'spec/dummy_app/config/application.rb'
+    - 'spec/dummy_app/config/boot.rb'
+    - 'spec/dummy_app/config/environment.rb'
+    - 'spec/integration/fields/multiple_carrierwave_spec.rb'
+    - 'spec/orm/active_record.rb'
+    - 'spec/rails_admin/active_record_extension_spec.rb'
+    - 'spec/rails_admin/install_generator_spec.rb'
+    - 'spec/spec_helper.rb'
+
+# Offense count: 9
+# Configuration parameters: MinBodyLength.
 Style/GuardClause:
-  Enabled: false
-
+  Exclude:
+    - 'lib/rails_admin.rb'
+    - 'lib/rails_admin/adapters/active_record.rb'
+    - 'lib/rails_admin/bootstrap-sass.rb'
+    - 'lib/rails_admin/config.rb'
+    - 'lib/rails_admin/config/actions.rb'
+    - 'lib/rails_admin/config/fields/types/polymorphic_association.rb'
+    - 'lib/rails_admin/config/inspectable.rb'
+    - 'lib/rails_admin/config/sections/list.rb'
+    - 'lib/rails_admin/extension.rb'
+
+# Offense count: 2
 Style/IdenticalConditionalBranches:
-  Enabled: false
+  Exclude:
+    - 'spec/integration/authorization/cancancan_spec.rb'
 
+# Offense count: 17
+# Cop supports --auto-correct.
 Style/IfUnlessModifier:
-  Enabled: false
-
+  Exclude:
+    - 'config/initializers/haml.rb'
+    - 'lib/rails_admin/adapters/active_record.rb'
+    - 'lib/rails_admin/adapters/mongoid.rb'
+    - 'lib/rails_admin/bootstrap-sass.rb'
+    - 'lib/rails_admin/config/actions/index.rb'
+    - 'lib/rails_admin/config/fields/types/active_storage.rb'
+    - 'lib/rails_admin/config/fields/types/multiple_active_storage.rb'
+    - 'lib/rails_admin/config/inspectable.rb'
+    - 'lib/rails_admin/extension.rb'
+    - 'lib/rails_admin/extensions/history/history.rb'
+    - 'lib/rails_admin/extensions/pundit/authorization_adapter.rb'
+    - 'lib/rails_admin/support/csv_converter.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: InverseMethods, InverseBlocks.
 Style/InverseMethods:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/config/fields.rb'
+    - 'lib/rails_admin/config/fields/types/enum.rb'
+    - 'lib/rails_admin/config/fields/types/polymorphic_association.rb'
 
+# Offense count: 4
 Style/MethodMissingSuper:
-  Enabled: false
-
-Style/MixinUsage:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/adapters/active_record/abstract_object.rb'
+    - 'lib/rails_admin/config/lazy_model.rb'
+    - 'lib/rails_admin/config/model.rb'
+    - 'lib/rails_admin/config/proxyable/proxy.rb'
 
+# Offense count: 4
 Style/MissingRespondToMissing:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/adapters/active_record/abstract_object.rb'
+    - 'lib/rails_admin/config/lazy_model.rb'
+    - 'lib/rails_admin/config/model.rb'
+    - 'lib/rails_admin/config/proxyable/proxy.rb'
 
-Style/MultilineIfModifier:
-  Enabled: false
+# Offense count: 2
+Style/MixinUsage:
+  Exclude:
+    - 'spec/controllers/rails_admin/main_controller_spec.rb'
 
+# Offense count: 14
+# Cop supports --auto-correct.
+Style/MultilineIfModifier:
+  Exclude:
+    - 'app/helpers/rails_admin/main_helper.rb'
+    - 'lib/rails_admin/extensions/pundit/authorization_adapter.rb'
+    - 'spec/controllers/rails_admin/main_controller_spec.rb'
+    - 'spec/integration/fields/action_text_spec.rb'
+    - 'spec/rails_admin/config/fields/types/action_text_spec.rb'
+    - 'spec/rails_admin/config/fields/types/active_storage_spec.rb'
+    - 'spec/rails_admin/config/fields/types/file_upload_spec.rb'
+    - 'spec/rails_admin/config/fields/types/multiple_active_storage_spec.rb'
+    - 'spec/rails_admin/config/fields/types/multiple_file_upload_spec.rb'
+    - 'spec/rails_admin/config/fields/types/shrine_spec.rb'
+    - 'spec/rails_admin/config_spec.rb'
+
+# Offense count: 1
 Style/MultipleComparison:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/abstract_model.rb'
 
+# Offense count: 2
+# Cop supports --auto-correct.
+# Configuration parameters: AutoCorrect, EnforcedStyle, IgnoredMethods.
+# SupportedStyles: predicate, comparison
 Style/NumericPredicate:
-  Enabled: false
+  Exclude:
+    - 'spec/**/*'
+    - 'lib/rails_admin/config.rb'
+    - 'lib/rails_admin/config/fields/types/string.rb'
 
+# Offense count: 1
+# Cop supports --auto-correct.
 Style/OrAssignment:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/config/sections.rb'
 
+# Offense count: 70
+# Cop supports --auto-correct.
+# Configuration parameters: PreferredDelimiters.
 Style/PercentLiteralDelimiters:
   Enabled: false
 
+# Offense count: 1
+# Cop supports --auto-correct.
 Style/RedundantSelf:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/config/fields/base.rb'
 
 # Offense count: 7
+# Cop supports --auto-correct.
 Style/RescueModifier:
-  Enabled: false
-
+  Exclude:
+    - 'app/helpers/rails_admin/application_helper.rb'
+    - 'lib/rails_admin/abstract_model.rb'
+    - 'lib/rails_admin/adapters/mongoid/association.rb'
+    - 'lib/rails_admin/config/actions/show_in_app.rb'
+    - 'lib/rails_admin/extensions/paper_trail/auditing_adapter.rb'
+
+# Offense count: 3
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: implicit, explicit
 Style/RescueStandardError:
-  Enabled: false
-
-Style/SafeNavigation:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/adapters/mongoid.rb'
+    - 'lib/rails_admin/adapters/mongoid/bson.rb'
+    - 'lib/rails_admin/support/i18n.rb'
 
+# Offense count: 1
+# Cop supports --auto-correct.
 Style/StderrPuts:
-  Enabled: false
+  Exclude:
+    - 'Rakefile'
 
+# Offense count: 528
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, ConsistentQuotesInMultiline.
+# SupportedStyles: single_quotes, double_quotes
 Style/StringLiterals:
   Enabled: false
 
+# Offense count: 93
+# Cop supports --auto-correct.
+# Configuration parameters: .
+# SupportedStyles: percent, brackets
 Style/SymbolArray:
-  Enabled: false
+  EnforcedStyle: percent
+  MinSize: 12
 
+# Offense count: 1
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, AllowSafeAssignment.
+# SupportedStyles: require_parentheses, require_no_parentheses, require_parentheses_when_complex
 Style/TernaryParentheses:
-  Enabled: false
+  Exclude:
+    - 'spec/spec_helper.rb'
 
+# Offense count: 10
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle, MinSize, WordRegex.
+# SupportedStyles: percent, brackets
 Style/WordArray:
-  Enabled: false
-
+  Exclude:
+    - 'lib/rails_admin/adapters/active_record.rb'
+    - 'lib/rails_admin/support/datetime.rb'
+    - 'lib/rails_admin/support/i18n.rb'
+    - 'spec/rails_admin/abstract_model_spec.rb'
+    - 'spec/rails_admin/adapters/active_record_spec.rb'
+
+# Offense count: 4
+# Cop supports --auto-correct.
+# Configuration parameters: EnforcedStyle.
+# SupportedStyles: forbid_for_all_comparison_operators, forbid_for_equality_operators_only, require_for_all_comparison_operators, require_for_equality_operators_only
 Style/YodaCondition:
-  Enabled: false
+  Exclude:
+    - 'lib/rails_admin/config/fields/base.rb'
+    - 'lib/rails_admin/config/hideable.rb'
+    - 'lib/tasks/rails_admin.rake'