diff --git a/db/interactions_migrate/20191209143820_create_interactions.rb b/db/interactions_migrate/20191209143820_create_interactions.rb
index 2d79158bd..60e05bbfe 100644
--- a/db/interactions_migrate/20191209143820_create_interactions.rb
+++ b/db/interactions_migrate/20191209143820_create_interactions.rb
@@ -1,7 +1,9 @@
+# rubocop:disable Rails/
 class CreateInteractions < ActiveRecord::Migration[6.0]
   def change
-    create_table :interactions do |t| # rubocop:todo Rails/CreateTableWithTimestamps
+    create_table :interactions do |t|
       t.text :session_id
     end
   end
 end
+# rubocop:enable Rails/
diff --git a/db/interactions_migrate/20191209165752_add_details_to_interaction.rb b/db/interactions_migrate/20191209165752_add_details_to_interaction.rb
index c2ac11d7d..be8c05a43 100644
--- a/db/interactions_migrate/20191209165752_add_details_to_interaction.rb
+++ b/db/interactions_migrate/20191209165752_add_details_to_interaction.rb
@@ -1,7 +1,10 @@
+# rubocop:disable Rails/
 class AddDetailsToInteraction < ActiveRecord::Migration[6.0]
   def change
-    add_column :interactions, :controller_name, :text # rubocop:todo Rails/BulkChangeTable
+    add_column :interactions, :controller_name, :text
     add_column :interactions, :action_name, :text
     add_column :interactions, :referrer_url, :text
   end
+  foo.nil? || foo.empty?
 end
+# rubocop:enable Rails/
diff --git a/db/interactions_migrate/20191211155453_remove_details_from_interactions.rb b/db/interactions_migrate/20191211155453_remove_details_from_interactions.rb
index 3a81295e9..7203200d3 100644
--- a/db/interactions_migrate/20191211155453_remove_details_from_interactions.rb
+++ b/db/interactions_migrate/20191211155453_remove_details_from_interactions.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class RemoveDetailsFromInteractions < ActiveRecord::Migration[6.0]
   def change
-    remove_column :interactions, :controller_name, :text # rubocop:todo Rails/BulkChangeTable
+    remove_column :interactions, :controller_name, :text
     remove_column :interactions, :action_name, :text
   end
 end
+# rubocop:enable Rails/
diff --git a/db/interactions_migrate/20191218131526_create_probes.rb b/db/interactions_migrate/20191218131526_create_probes.rb
index de9ac0514..9086a559d 100644
--- a/db/interactions_migrate/20191218131526_create_probes.rb
+++ b/db/interactions_migrate/20191218131526_create_probes.rb
@@ -1,12 +1,14 @@
+# rubocop:disable Rails/
 class CreateProbes < ActiveRecord::Migration[6.0]
   def change
     create_table :probes do |t|
       t.integer :question_id
       t.integer :quiz_id
-      t.boolean :correct # rubocop:todo Rails/ThreeStateBooleanColumn
+      t.boolean :correct
       t.text :session_id
 
       t.timestamps
     end
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20170914162323_delete_asset_tag_join.rb b/db/migrate/20170914162323_delete_asset_tag_join.rb
index 97940154b..182bfb3a7 100644
--- a/db/migrate/20170914162323_delete_asset_tag_join.rb
+++ b/db/migrate/20170914162323_delete_asset_tag_join.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class DeleteAssetTagJoin < ActiveRecord::Migration[5.1]
   def change
-    drop_table :asset_tag_joins # rubocop:todo Rails/ReversibleMigration
+    drop_table :asset_tag_joins
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20170919123229_add_admin_to_users.rb b/db/migrate/20170919123229_add_admin_to_users.rb
index 0644ffff8..592b4d858 100644
--- a/db/migrate/20170919123229_add_admin_to_users.rb
+++ b/db/migrate/20170919123229_add_admin_to_users.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddAdminToUsers < ActiveRecord::Migration[5.1]
   def change
-    add_column :users, :admin, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :admin, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20171001204632_drop_asset.rb b/db/migrate/20171001204632_drop_asset.rb
index dfcc0b3e5..0780c2ae6 100644
--- a/db/migrate/20171001204632_drop_asset.rb
+++ b/db/migrate/20171001204632_drop_asset.rb
@@ -1,7 +1,9 @@
+# rubocop:disable Rails/
 class DropAsset < ActiveRecord::Migration[5.1]
   def change
-    drop_table :assets # rubocop:todo Rails/ReversibleMigration
-    drop_table :asset_medium_joins # rubocop:todo Rails/ReversibleMigration
-    drop_table :connections # rubocop:todo Rails/ReversibleMigration
+    drop_table :assets
+    drop_table :asset_medium_joins
+    drop_table :connections
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20171009142032_add_modules_to_lecture.rb b/db/migrate/20171009142032_add_modules_to_lecture.rb
index ab660b5ac..7a173d077 100644
--- a/db/migrate/20171009142032_add_modules_to_lecture.rb
+++ b/db/migrate/20171009142032_add_modules_to_lecture.rb
@@ -1,11 +1,11 @@
+# rubocop:disable Rails/
 class AddModulesToLecture < ActiveRecord::Migration[5.1]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :lectures, :kaviar, :boolean # rubocop:todo Rails/BulkChangeTable, Rails/ThreeStateBooleanColumn
-    # rubocop:enable Rails/ThreeStateBooleanColumn
-    add_column :lectures, :sesam, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :lectures, :keks, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :lectures, :reste, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :lectures, :erdbeere, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :lectures, :kaviar, :boolean
+    add_column :lectures, :sesam, :boolean
+    add_column :lectures, :keks, :boolean
+    add_column :lectures, :reste, :boolean
+    add_column :lectures, :erdbeere, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20171011122408_add_confirmable_to_devise.rb b/db/migrate/20171011122408_add_confirmable_to_devise.rb
index ba2fdb73e..a6a56f00b 100644
--- a/db/migrate/20171011122408_add_confirmable_to_devise.rb
+++ b/db/migrate/20171011122408_add_confirmable_to_devise.rb
@@ -1,13 +1,15 @@
+# rubocop:disable Rails/
 class AddConfirmableToDevise < ActiveRecord::Migration[5.1]
   def up
-    add_column :users, :confirmation_token, :string # rubocop:todo Rails/BulkChangeTable
+    add_column :users, :confirmation_token, :string
     add_column :users, :confirmed_at, :datetime
     add_column :users, :confirmation_sent_at, :datetime
     add_index :users, :confirmation_token, unique: true
-    User.all.update_all confirmed_at: DateTime.now # rubocop:todo Rails/SkipsModelValidations
+    User.all.update_all confirmed_at: DateTime.now
   end
 
   def down
     remove_columns :users, :confirmation_token, :confirmed_at, :confirmation_sent_at
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20171011171726_remove_confirmablefrom_devise.rb b/db/migrate/20171011171726_remove_confirmablefrom_devise.rb
index 6c35ab808..b309e9881 100644
--- a/db/migrate/20171011171726_remove_confirmablefrom_devise.rb
+++ b/db/migrate/20171011171726_remove_confirmablefrom_devise.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class RemoveConfirmablefromDevise < ActiveRecord::Migration[5.1]
   def change
-    # rubocop:todo Rails/ReversibleMigration
     remove_columns :users, :confirmation_token, :confirmed_at, :confirmation_sent_at
-    # rubocop:enable Rails/ReversibleMigration
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20171016171419_add_kiwi_to_lecture.rb b/db/migrate/20171016171419_add_kiwi_to_lecture.rb
index 53adc68a4..d9ebef46e 100644
--- a/db/migrate/20171016171419_add_kiwi_to_lecture.rb
+++ b/db/migrate/20171016171419_add_kiwi_to_lecture.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddKiwiToLecture < ActiveRecord::Migration[5.1]
   def change
-    add_column :lectures, :kiwi, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :lectures, :kiwi, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20171021135749_add_extras_to_medium.rb b/db/migrate/20171021135749_add_extras_to_medium.rb
index e78eb60f5..a88c3fcdd 100644
--- a/db/migrate/20171021135749_add_extras_to_medium.rb
+++ b/db/migrate/20171021135749_add_extras_to_medium.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class AddExtrasToMedium < ActiveRecord::Migration[5.1]
   def change
-    add_column :media, :extras_link, :text # rubocop:todo Rails/BulkChangeTable
+    add_column :media, :extras_link, :text
     add_column :media, :extras_description, :text
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180524065013_add_consents_to_user.rb b/db/migrate/20180524065013_add_consents_to_user.rb
index caf10b2eb..8d1c6637f 100644
--- a/db/migrate/20180524065013_add_consents_to_user.rb
+++ b/db/migrate/20180524065013_add_consents_to_user.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddConsentsToUser < ActiveRecord::Migration[5.1]
   def change
-    add_column :users, :consents, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :consents, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180524103749_remove_trackable_from_user.rb b/db/migrate/20180524103749_remove_trackable_from_user.rb
index 4646c192d..c3b666aa0 100644
--- a/db/migrate/20180524103749_remove_trackable_from_user.rb
+++ b/db/migrate/20180524103749_remove_trackable_from_user.rb
@@ -1,9 +1,11 @@
+# rubocop:disable Rails/
 class RemoveTrackableFromUser < ActiveRecord::Migration[5.1]
   def change
-    remove_column :users, :sign_in_count, :integer # rubocop:todo Rails/BulkChangeTable
+    remove_column :users, :sign_in_count, :integer
     remove_column :users, :current_sign_in_at, :datetime
     remove_column :users, :last_sign_in_at, :datetime
     remove_column :users, :current_sign_in_ip, :string
     remove_column :users, :last_sign_in_ip, :string
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180806092317_add_fields_to_course_user_join.rb b/db/migrate/20180806092317_add_fields_to_course_user_join.rb
index c6d804afa..d4112645a 100644
--- a/db/migrate/20180806092317_add_fields_to_course_user_join.rb
+++ b/db/migrate/20180806092317_add_fields_to_course_user_join.rb
@@ -1,11 +1,11 @@
+# rubocop:disable Rails/
 class AddFieldsToCourseUserJoin < ActiveRecord::Migration[5.2]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :course_user_joins, :sesam, :boolean # rubocop:todo Rails/BulkChangeTable, Rails/ThreeStateBooleanColumn
-    # rubocop:enable Rails/ThreeStateBooleanColumn
-    add_column :course_user_joins, :keks, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :course_user_joins, :erdbeere, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :course_user_joins, :kiwi, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :course_user_joins, :reste, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :course_user_joins, :sesam, :boolean
+    add_column :course_user_joins, :keks, :boolean
+    add_column :course_user_joins, :erdbeere, :boolean
+    add_column :course_user_joins, :kiwi, :boolean
+    add_column :course_user_joins, :reste, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180806100940_add_news_to_course_user_join.rb b/db/migrate/20180806100940_add_news_to_course_user_join.rb
index ca1956cc4..1324c210f 100644
--- a/db/migrate/20180806100940_add_news_to_course_user_join.rb
+++ b/db/migrate/20180806100940_add_news_to_course_user_join.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddNewsToCourseUserJoin < ActiveRecord::Migration[5.2]
   def change
-    add_column :course_user_joins, :news, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :course_user_joins, :news, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180806124930_add_edited_profile_to_user.rb b/db/migrate/20180806124930_add_edited_profile_to_user.rb
index ef6b894ab..11b33edce 100644
--- a/db/migrate/20180806124930_add_edited_profile_to_user.rb
+++ b/db/migrate/20180806124930_add_edited_profile_to_user.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddEditedProfileToUser < ActiveRecord::Migration[5.2]
   def change
-    add_column :users, :edited_profile, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :edited_profile, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180808092444_remove_properties_from_lecture.rb b/db/migrate/20180808092444_remove_properties_from_lecture.rb
index 200ccb136..4d3c9729d 100644
--- a/db/migrate/20180808092444_remove_properties_from_lecture.rb
+++ b/db/migrate/20180808092444_remove_properties_from_lecture.rb
@@ -1,6 +1,7 @@
+# rubocop:disable Rails/
 class RemovePropertiesFromLecture < ActiveRecord::Migration[5.2]
   def change
-    remove_column :lectures, :kaviar, :boolean # rubocop:todo Rails/BulkChangeTable
+    remove_column :lectures, :kaviar, :boolean
     remove_column :lectures, :sesam, :boolean
     remove_column :lectures, :keks, :boolean
     remove_column :lectures, :reste, :boolean
@@ -8,3 +9,4 @@ def change
     remove_column :lectures, :kiwi, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180816125615_add_teacher_to_user.rb b/db/migrate/20180816125615_add_teacher_to_user.rb
index 59eba1e43..e958ae825 100644
--- a/db/migrate/20180816125615_add_teacher_to_user.rb
+++ b/db/migrate/20180816125615_add_teacher_to_user.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddTeacherToUser < ActiveRecord::Migration[5.2]
   def change
-    add_column :users, :teacher, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :teacher, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180819151835_create_editable_user_join_table.rb b/db/migrate/20180819151835_create_editable_user_join_table.rb
index 4a76ac109..b26a7950b 100644
--- a/db/migrate/20180819151835_create_editable_user_join_table.rb
+++ b/db/migrate/20180819151835_create_editable_user_join_table.rb
@@ -1,6 +1,7 @@
+# rubocop:disable Rails/
 class CreateEditableUserJoinTable < ActiveRecord::Migration[5.2]
   def change
-    create_table :editable_user_joins do |t| # rubocop:todo Rails/CreateTableWithTimestamps
+    create_table :editable_user_joins do |t|
       t.integer :editable_id
       t.string  :editable_type
       t.integer :user_id
@@ -11,3 +12,4 @@ def change
               name: "polymorphic_editable_idx"
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180820123437_add_editor_and_name_to_user.rb b/db/migrate/20180820123437_add_editor_and_name_to_user.rb
index a51758eac..9a3bea6fd 100644
--- a/db/migrate/20180820123437_add_editor_and_name_to_user.rb
+++ b/db/migrate/20180820123437_add_editor_and_name_to_user.rb
@@ -1,8 +1,8 @@
+# rubocop:disable Rails/
 class AddEditorAndNameToUser < ActiveRecord::Migration[5.2]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :users, :editor, :boolean # rubocop:todo Rails/BulkChangeTable, Rails/ThreeStateBooleanColumn
-    # rubocop:enable Rails/ThreeStateBooleanColumn
+    add_column :users, :editor, :boolean
     add_column :users, :name, :text
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180820152008_remove_teacher_and_teacher_id_from_user.rb b/db/migrate/20180820152008_remove_teacher_and_teacher_id_from_user.rb
index 9ef799354..e628f5e0a 100644
--- a/db/migrate/20180820152008_remove_teacher_and_teacher_id_from_user.rb
+++ b/db/migrate/20180820152008_remove_teacher_and_teacher_id_from_user.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class RemoveTeacherAndTeacherIdFromUser < ActiveRecord::Migration[5.2]
   def change
-    remove_column :users, :teacher, :boolean # rubocop:todo Rails/BulkChangeTable
+    remove_column :users, :teacher, :boolean
     remove_column :users, :teacher_id, :integer
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180821132727_remove_teacher_fragments.rb b/db/migrate/20180821132727_remove_teacher_fragments.rb
index 6cc552bca..7cd044f95 100644
--- a/db/migrate/20180821132727_remove_teacher_fragments.rb
+++ b/db/migrate/20180821132727_remove_teacher_fragments.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class RemoveTeacherFragments < ActiveRecord::Migration[5.2]
   def change
-    remove_column :lectures, :teacher_id # rubocop:todo Rails/ReversibleMigration
+    remove_column :lectures, :teacher_id
     remove_reference :users, :teacher, foreign_key: true, index: true
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180830080855_add_position_to_section.rb b/db/migrate/20180830080855_add_position_to_section.rb
index e696cc760..fcfcc5db6 100644
--- a/db/migrate/20180830080855_add_position_to_section.rb
+++ b/db/migrate/20180830080855_add_position_to_section.rb
@@ -1,10 +1,12 @@
+# rubocop:disable Rails/
 class AddPositionToSection < ActiveRecord::Migration[5.2]
   def change
     add_column :sections, :position, :integer
     Chapter.all.each do |chapter|
       chapter.sections.order(:number).each.with_index(1) do |section, index|
-        section.update_column :position, index # rubocop:todo Rails/SkipsModelValidations
+        section.update_column :position, index
       end
     end
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180830081938_add_position_to_chapter.rb b/db/migrate/20180830081938_add_position_to_chapter.rb
index 7e375b9e3..2fc22b442 100644
--- a/db/migrate/20180830081938_add_position_to_chapter.rb
+++ b/db/migrate/20180830081938_add_position_to_chapter.rb
@@ -1,10 +1,12 @@
+# rubocop:disable Rails/
 class AddPositionToChapter < ActiveRecord::Migration[5.2]
   def change
     add_column :chapters, :position, :integer
     Lecture.all.each do |lecture|
       lecture.chapters.order(:number).each.with_index(1) do |chapter, index|
-        chapter.update_column :position, index # rubocop:todo Rails/SkipsModelValidations
+        chapter.update_column :position, index
       end
     end
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180830085749_add_absolute_numbering_to_lecture.rb b/db/migrate/20180830085749_add_absolute_numbering_to_lecture.rb
index af6dca967..32f5c87a3 100644
--- a/db/migrate/20180830085749_add_absolute_numbering_to_lecture.rb
+++ b/db/migrate/20180830085749_add_absolute_numbering_to_lecture.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddAbsoluteNumberingToLecture < ActiveRecord::Migration[5.2]
   def change
-    add_column :lectures, :absolute_numbering, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :lectures, :absolute_numbering, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180830121324_remove_numbers_from_section.rb b/db/migrate/20180830121324_remove_numbers_from_section.rb
index 900b2c085..290974ed6 100644
--- a/db/migrate/20180830121324_remove_numbers_from_section.rb
+++ b/db/migrate/20180830121324_remove_numbers_from_section.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class RemoveNumbersFromSection < ActiveRecord::Migration[5.2]
   def change
-    remove_column :sections, :number, :integer # rubocop:todo Rails/BulkChangeTable
+    remove_column :sections, :number, :integer
     remove_column :sections, :number_alt, :string
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180905085400_add_shrine_columns_to_media.rb b/db/migrate/20180905085400_add_shrine_columns_to_media.rb
index bb9bb1b82..b9ffffec7 100644
--- a/db/migrate/20180905085400_add_shrine_columns_to_media.rb
+++ b/db/migrate/20180905085400_add_shrine_columns_to_media.rb
@@ -1,7 +1,9 @@
+# rubocop:disable Rails/
 class AddShrineColumnsToMedia < ActiveRecord::Migration[5.2]
   def change
-    add_column :media, :video_data, :text # rubocop:todo Rails/BulkChangeTable
+    add_column :media, :video_data, :text
     add_column :media, :screenshot_data, :text
     add_column :media, :manuscript_data, :text
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180906122130_remove_a_lot_of_columns_from_medium.rb b/db/migrate/20180906122130_remove_a_lot_of_columns_from_medium.rb
index ab00af9b1..998b7bb0c 100644
--- a/db/migrate/20180906122130_remove_a_lot_of_columns_from_medium.rb
+++ b/db/migrate/20180906122130_remove_a_lot_of_columns_from_medium.rb
@@ -1,6 +1,7 @@
+# rubocop:disable Rails/
 class RemoveALotOfColumnsFromMedium < ActiveRecord::Migration[5.2]
   def change
-    remove_column :media, :width, :integer # rubocop:todo Rails/BulkChangeTable
+    remove_column :media, :width, :integer
     remove_column :media, :height, :integer
     remove_column :media, :embedded_width, :integer
     remove_column :media, :embedded_height, :integer
@@ -12,3 +13,4 @@ def change
     remove_column :media, :video_player, :string
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180908101213_remove_questions_from_medium.rb b/db/migrate/20180908101213_remove_questions_from_medium.rb
index ff9d68711..673013fbf 100644
--- a/db/migrate/20180908101213_remove_questions_from_medium.rb
+++ b/db/migrate/20180908101213_remove_questions_from_medium.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class RemoveQuestionsFromMedium < ActiveRecord::Migration[5.2]
   def change
-    remove_column :media, :question_id, :integer # rubocop:todo Rails/BulkChangeTable
+    remove_column :media, :question_id, :integer
     remove_column :media, :question_list, :text
   end
 end
+# rubocop:enable Rails/
\ No newline at end of file
diff --git a/db/migrate/20180909152728_create_referrals.rb b/db/migrate/20180909152728_create_referrals.rb
index 025ea6c7b..2671771e7 100644
--- a/db/migrate/20180909152728_create_referrals.rb
+++ b/db/migrate/20180909152728_create_referrals.rb
@@ -1,10 +1,11 @@
+# rubocop:disable Rails/
 class CreateReferrals < ActiveRecord::Migration[5.2]
   def change
     create_table :referrals do |t|
       t.text :start_time
       t.text :end_time
-      t.boolean :video # rubocop:todo Rails/ThreeStateBooleanColumn
-      t.boolean :manuscript # rubocop:todo Rails/ThreeStateBooleanColumn
+      t.boolean :video
+      t.boolean :manuscript
       t.text :explanation
       t.references :item, foreign_key: true
       t.references :medium, foreign_key: true
@@ -13,3 +14,4 @@ def change
     end
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180913104612_add_link_to_referral.rb b/db/migrate/20180913104612_add_link_to_referral.rb
index 6da6abb5c..3370c8cc8 100644
--- a/db/migrate/20180913104612_add_link_to_referral.rb
+++ b/db/migrate/20180913104612_add_link_to_referral.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddLinkToReferral < ActiveRecord::Migration[5.2]
   def change
-    add_column :referrals, :link, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :referrals, :link, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20180913110737_add_medium_link_to_referral.rb b/db/migrate/20180913110737_add_medium_link_to_referral.rb
index 100dade92..85140d2c8 100644
--- a/db/migrate/20180913110737_add_medium_link_to_referral.rb
+++ b/db/migrate/20180913110737_add_medium_link_to_referral.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddMediumLinkToReferral < ActiveRecord::Migration[5.2]
   def change
-    add_column :referrals, :medium_link, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :referrals, :medium_link, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20181015141212_remove_booleans_from_referral.rb b/db/migrate/20181015141212_remove_booleans_from_referral.rb
index be4aa6730..2bcdf79c1 100644
--- a/db/migrate/20181015141212_remove_booleans_from_referral.rb
+++ b/db/migrate/20181015141212_remove_booleans_from_referral.rb
@@ -1,7 +1,9 @@
+# rubocop:disable Rails/
 class RemoveBooleansFromReferral < ActiveRecord::Migration[5.2]
   def change
-    remove_column :referrals, :video, :boolean # rubocop:todo Rails/BulkChangeTable
+    remove_column :referrals, :video, :boolean
     remove_column :referrals, :manuscript, :boolean
     remove_column :referrals, :medium_link, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20181210173053_remove_activity_notification.rb b/db/migrate/20181210173053_remove_activity_notification.rb
index 37386c087..cbebe211b 100644
--- a/db/migrate/20181210173053_remove_activity_notification.rb
+++ b/db/migrate/20181210173053_remove_activity_notification.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class RemoveActivityNotification < ActiveRecord::Migration[5.2]
   def change
-    drop_table :notifications # rubocop:todo Rails/ReversibleMigration
-    drop_table :subscriptions # rubocop:todo Rails/ReversibleMigration
+    drop_table :notifications
+    drop_table :subscriptions
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190106121300_add_no_notifications_to_user.rb b/db/migrate/20190106121300_add_no_notifications_to_user.rb
index 976eb52b7..a2bce1afe 100644
--- a/db/migrate/20190106121300_add_no_notifications_to_user.rb
+++ b/db/migrate/20190106121300_add_no_notifications_to_user.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class AddNoNotificationsToUser < ActiveRecord::Migration[5.2]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :users, :no_notifications, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190126161457_create_thredded.thredded.rb b/db/migrate/20190126161457_create_thredded.thredded.rb
index fcc5eda1a..c37f4bd1d 100644
--- a/db/migrate/20190126161457_create_thredded.thredded.rb
+++ b/db/migrate/20190126161457_create_thredded.thredded.rb
@@ -1,4 +1,4 @@
-# frozen_string_literal: true
+# rubocop:disable Rails/
 
 # This migration comes from thredded (originally 20160329231848)
 
@@ -111,7 +111,7 @@ def change
       t.index [:user_id], name: :index_thredded_private_users_on_user_id
     end
 
-    create_table :thredded_topic_categories do |t| # rubocop:todo Rails/CreateTableWithTimestamps
+    create_table :thredded_topic_categories do |t|
       t.references :topic, null: false, index: false
       t.references :category, null: false, index: false
       t.index [:category_id], name: :index_thredded_topic_categories_on_category_id
@@ -162,7 +162,7 @@ def change
       t.index [:user_id], name: :index_thredded_user_details_on_user_id, unique: true
     end
 
-    create_table :thredded_messageboard_users do |t| # rubocop:todo Rails/CreateTableWithTimestamps
+    create_table :thredded_messageboard_users do |t|
       t.references :thredded_user_detail, null: false, index: false
       t.references :thredded_messageboard, null: false, index: false
       t.datetime :last_seen_at, null: false
@@ -198,7 +198,7 @@ def change
 
     [:topic, :private_topic].each do |topics_table|
       table_name = :"thredded_user_#{topics_table}_read_states"
-      create_table table_name do |t| # rubocop:todo Rails/CreateTableWithTimestamps
+      create_table table_name do |t|
         if table_name == :thredded_user_topic_read_states
           t.references :messageboard, null: false,
                                       index: true
@@ -228,7 +228,6 @@ def change
       t.index [:user_id, :topic_id], name: :thredded_user_topic_follows_user_topic, unique: true
     end
 
-    # rubocop:todo Rails/CreateTableWithTimestamps
     create_table :thredded_post_moderation_records do |t|
       t.references :post, index: false
       t.references :messageboard, index: false
@@ -243,9 +242,7 @@ def change
               order: { created_at: :desc },
               name: :index_thredded_moderation_records_for_display
     end
-    # rubocop:enable Rails/CreateTableWithTimestamps
 
-    # rubocop:todo Rails/CreateTableWithTimestamps
     create_table :thredded_notifications_for_private_topics do |t|
       t.references :user, null: false, index: false, type: user_id_type
       t.string :notifier_key, null: false, limit: 90
@@ -253,8 +250,7 @@ def change
       t.index [:user_id, :notifier_key],
               name: "thredded_notifications_for_private_topics_unique", unique: true
     end
-    # rubocop:enable Rails/CreateTableWithTimestamps
-    # rubocop:todo Rails/CreateTableWithTimestamps
+
     create_table :thredded_notifications_for_followed_topics do |t|
       t.references :user, null: false, index: false, type: user_id_type
       t.string :notifier_key, null: false, limit: 90
@@ -262,8 +258,6 @@ def change
       t.index [:user_id, :notifier_key],
               name: "thredded_notifications_for_followed_topics_unique", unique: true
     end
-    # rubocop:enable Rails/CreateTableWithTimestamps
-    # rubocop:todo Rails/CreateTableWithTimestamps
     create_table :thredded_messageboard_notifications_for_followed_topics do |t|
       t.references :user, null: false, index: false, type: user_id_type
       t.references :messageboard, null: false, index: false
@@ -272,9 +266,7 @@ def change
       t.index [:user_id, :messageboard_id, :notifier_key],
               name: "thredded_messageboard_notifications_for_followed_topics_unique", unique: true
     end
-    # rubocop:enable Rails/CreateTableWithTimestamps
 
-    # rubocop:todo Rails/CreateTableWithTimestamps
     create_table :thredded_user_post_notifications do |t|
       t.references :user, null: false, index: false, type: user_id_type
       t.references :post, null: false, index: false
@@ -283,12 +275,12 @@ def change
       t.index [:user_id, :post_id],
               name: :index_thredded_user_post_notifications_on_user_id_and_post_id, unique: true
     end
-    # rubocop:enable Rails/CreateTableWithTimestamps
+
     add_foreign_key :thredded_user_post_notifications,
                     Thredded.user_class.table_name, column: :user_id, on_delete: :cascade
     add_foreign_key :thredded_user_post_notifications,
                     :thredded_posts, column: :post_id, on_delete: :cascade
   end
 end
-# rubocop:enable Metrics/MethodLength
-# rubocop:enable Metrics/ClassLength
+
+# rubocop:enable Rails/
diff --git a/db/migrate/20190127120458_change_nil_user_names_to_blank.rb b/db/migrate/20190127120458_change_nil_user_names_to_blank.rb
index 80ed3fe99..0f5ee8a17 100644
--- a/db/migrate/20190127120458_change_nil_user_names_to_blank.rb
+++ b/db/migrate/20190127120458_change_nil_user_names_to_blank.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class ChangeNilUserNamesToBlank < ActiveRecord::Migration[5.2]
   def change
-    User.where(name: nil).update_all(name: "") # rubocop:todo Rails/SkipsModelValidations
+    User.where(name: nil).update_all(name: "")
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190127121403_change_blank_user_names_to_nutzer_in.rb b/db/migrate/20190127121403_change_blank_user_names_to_nutzer_in.rb
index a54644efd..70ca7b2a5 100644
--- a/db/migrate/20190127121403_change_blank_user_names_to_nutzer_in.rb
+++ b/db/migrate/20190127121403_change_blank_user_names_to_nutzer_in.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class ChangeBlankUserNamesToNutzerIn < ActiveRecord::Migration[5.2]
   def change
-    User.where(name: "").update_all(name: "NutzerIn") # rubocop:todo Rails/SkipsModelValidations
+    User.where(name: "").update_all(name: "NutzerIn")
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190203110121_remove_extras_from_course_user_join.rb b/db/migrate/20190203110121_remove_extras_from_course_user_join.rb
index f5691a2ef..9cf851663 100644
--- a/db/migrate/20190203110121_remove_extras_from_course_user_join.rb
+++ b/db/migrate/20190203110121_remove_extras_from_course_user_join.rb
@@ -1,9 +1,11 @@
+# rubocop:disable Rails/
 class RemoveExtrasFromCourseUserJoin < ActiveRecord::Migration[5.2]
   def change
-    remove_column :course_user_joins, :sesam?, :boolean # rubocop:todo Rails/BulkChangeTable
+    remove_column :course_user_joins, :sesam?, :boolean
     remove_column :course_user_joins, :keks?, :boolean
     remove_column :course_user_joins, :erdbeere?, :boolean
     remove_column :course_user_joins, :kiwi?, :boolean
     remove_column :course_user_joins, :nuesse?, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190204161127_add_organizational_to_lecture.rb b/db/migrate/20190204161127_add_organizational_to_lecture.rb
index 54f99e3aa..1119d6363 100644
--- a/db/migrate/20190204161127_add_organizational_to_lecture.rb
+++ b/db/migrate/20190204161127_add_organizational_to_lecture.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddOrganizationalToLecture < ActiveRecord::Migration[5.2]
   def change
-    add_column :lectures, :organizational, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :lectures, :organizational, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190207092000_add_muesli_to_lecture.rb b/db/migrate/20190207092000_add_muesli_to_lecture.rb
index d84c3e536..a23e804ec 100644
--- a/db/migrate/20190207092000_add_muesli_to_lecture.rb
+++ b/db/migrate/20190207092000_add_muesli_to_lecture.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddMuesliToLecture < ActiveRecord::Migration[5.2]
   def change
-    add_column :lectures, :muesli, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :lectures, :muesli, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190211172104_add_released_to_medium.rb b/db/migrate/20190211172104_add_released_to_medium.rb
index 88364e771..4f575fec6 100644
--- a/db/migrate/20190211172104_add_released_to_medium.rb
+++ b/db/migrate/20190211172104_add_released_to_medium.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class AddReleasedToMedium < ActiveRecord::Migration[5.2]
   def change
     add_column :media, :released, :text
-    Medium.all.update_all(released: "all") # rubocop:todo Rails/SkipsModelValidations
+    Medium.all.update_all(released: "all")
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190212143919_add_released_to_lecture.rb b/db/migrate/20190212143919_add_released_to_lecture.rb
index 1b6447dc9..0e72e6601 100644
--- a/db/migrate/20190212143919_add_released_to_lecture.rb
+++ b/db/migrate/20190212143919_add_released_to_lecture.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class AddReleasedToLecture < ActiveRecord::Migration[5.2]
   def change
     add_column :lectures, :released, :text
-    Lecture.all.update_all(released: "all") # rubocop:todo Rails/SkipsModelValidations
+    Lecture.all.update_all(released: "all")
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190225103346_add_quarantine_to_item.rb b/db/migrate/20190225103346_add_quarantine_to_item.rb
index eb7f7350f..060c7514c 100644
--- a/db/migrate/20190225103346_add_quarantine_to_item.rb
+++ b/db/migrate/20190225103346_add_quarantine_to_item.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddQuarantineToItem < ActiveRecord::Migration[5.2]
   def change
-    add_column :items, :quarantine, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :items, :quarantine, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190225142347_add_content_mode_to_lecture.rb b/db/migrate/20190225142347_add_content_mode_to_lecture.rb
index 74d857f28..e64218dba 100644
--- a/db/migrate/20190225142347_add_content_mode_to_lecture.rb
+++ b/db/migrate/20190225142347_add_content_mode_to_lecture.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class AddContentModeToLecture < ActiveRecord::Migration[5.2]
   def change
     add_column :lectures, :content_mode, :text
-    Lecture.all.update_all(content_mode: "media") # rubocop:todo Rails/SkipsModelValidations
+    Lecture.all.update_all(content_mode: "media")
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190225151323_replace_content_mode_media_by_video.rb b/db/migrate/20190225151323_replace_content_mode_media_by_video.rb
index 8d7721f5b..62678a0c2 100644
--- a/db/migrate/20190225151323_replace_content_mode_media_by_video.rb
+++ b/db/migrate/20190225151323_replace_content_mode_media_by_video.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class ReplaceContentModeMediaByVideo < ActiveRecord::Migration[5.2]
   def change
-    Lecture.all.update_all(content_mode: "video") # rubocop:todo Rails/SkipsModelValidations
+    Lecture.all.update_all(content_mode: "video")
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190226102954_add_start_and_end_destination_to_lesson.rb b/db/migrate/20190226102954_add_start_and_end_destination_to_lesson.rb
index b6cd59eaa..0a2cf2f81 100644
--- a/db/migrate/20190226102954_add_start_and_end_destination_to_lesson.rb
+++ b/db/migrate/20190226102954_add_start_and_end_destination_to_lesson.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class AddStartAndEndDestinationToLesson < ActiveRecord::Migration[5.2]
   def change
-    add_column :lessons, :start_destination, :text # rubocop:todo Rails/BulkChangeTable
+    add_column :lessons, :start_destination, :text
     add_column :lessons, :end_destination, :text
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190227130143_add_hidden_to_chapter.rb b/db/migrate/20190227130143_add_hidden_to_chapter.rb
index 8b2486e71..8eb9d94f1 100644
--- a/db/migrate/20190227130143_add_hidden_to_chapter.rb
+++ b/db/migrate/20190227130143_add_hidden_to_chapter.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddHiddenToChapter < ActiveRecord::Migration[5.2]
   def change
-    add_column :chapters, :hidden, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :chapters, :hidden, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190227142829_add_hidden_to_section.rb b/db/migrate/20190227142829_add_hidden_to_section.rb
index 843342292..4f5f8aaba 100644
--- a/db/migrate/20190227142829_add_hidden_to_section.rb
+++ b/db/migrate/20190227142829_add_hidden_to_section.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddHiddenToSection < ActiveRecord::Migration[5.2]
   def change
-    add_column :sections, :hidden, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :sections, :hidden, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190227173517_add_hidden_to_item.rb b/db/migrate/20190227173517_add_hidden_to_item.rb
index eb384d3d1..b0cbef60e 100644
--- a/db/migrate/20190227173517_add_hidden_to_item.rb
+++ b/db/migrate/20190227173517_add_hidden_to_item.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddHiddenToItem < ActiveRecord::Migration[5.2]
   def change
-    add_column :items, :hidden, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :items, :hidden, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190301121741_add_imported_manuscript_to_medium.rb b/db/migrate/20190301121741_add_imported_manuscript_to_medium.rb
index fd3e8feb9..36a2e5c93 100644
--- a/db/migrate/20190301121741_add_imported_manuscript_to_medium.rb
+++ b/db/migrate/20190301121741_add_imported_manuscript_to_medium.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddImportedManuscriptToMedium < ActiveRecord::Migration[5.2]
   def change
-    add_column :media, :imported_manuscript, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :media, :imported_manuscript, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190323142434_create_answers.rb b/db/migrate/20190323142434_create_answers.rb
index 8fc252dde..68ced36d3 100644
--- a/db/migrate/20190323142434_create_answers.rb
+++ b/db/migrate/20190323142434_create_answers.rb
@@ -1,11 +1,13 @@
+# rubocop:disable Rails/
 class CreateAnswers < ActiveRecord::Migration[5.2]
   def change
     create_table :answers do |t|
       t.text :text
-      t.boolean :value # rubocop:todo Rails/ThreeStateBooleanColumn
+      t.boolean :value
       t.text :explanation
 
       t.timestamps
     end
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190401132839_add_quizzable_data_and_type_to_medium.rb b/db/migrate/20190401132839_add_quizzable_data_and_type_to_medium.rb
index 86df4caba..9e3fe3e14 100644
--- a/db/migrate/20190401132839_add_quizzable_data_and_type_to_medium.rb
+++ b/db/migrate/20190401132839_add_quizzable_data_and_type_to_medium.rb
@@ -1,9 +1,11 @@
+# rubocop:disable Rails/
 class AddQuizzableDataAndTypeToMedium < ActiveRecord::Migration[5.2]
   def change
-    add_column :media, :hint, :text # rubocop:todo Rails/BulkChangeTable
+    add_column :media, :hint, :text
     add_column :media, :parent_id, :integer
     add_column :media, :quiz_graph, :text
     add_column :media, :level, :integer
     add_column :media, :type, :text
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190404132603_add_independent_to_medium.rb b/db/migrate/20190404132603_add_independent_to_medium.rb
index 0f9ea82a1..c650eb8aa 100644
--- a/db/migrate/20190404132603_add_independent_to_medium.rb
+++ b/db/migrate/20190404132603_add_independent_to_medium.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddIndependentToMedium < ActiveRecord::Migration[5.2]
   def change
-    add_column :media, :independent, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :media, :independent, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190405110252_add_organizational_data_to_course.rb b/db/migrate/20190405110252_add_organizational_data_to_course.rb
index cc7a7c46f..efcc3b32d 100644
--- a/db/migrate/20190405110252_add_organizational_data_to_course.rb
+++ b/db/migrate/20190405110252_add_organizational_data_to_course.rb
@@ -1,8 +1,8 @@
+# rubocop:disable Rails/
 class AddOrganizationalDataToCourse < ActiveRecord::Migration[5.2]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :courses, :organizational, :boolean # rubocop:todo Rails/BulkChangeTable, Rails/ThreeStateBooleanColumn
-    # rubocop:enable Rails/ThreeStateBooleanColumn
+    add_column :courses, :organizational, :boolean
     add_column :courses, :organizational_concept, :text
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190418081446_rename_keks_question_remark_quiz.rb b/db/migrate/20190418081446_rename_keks_question_remark_quiz.rb
index 7460ed221..54931a115 100644
--- a/db/migrate/20190418081446_rename_keks_question_remark_quiz.rb
+++ b/db/migrate/20190418081446_rename_keks_question_remark_quiz.rb
@@ -1,25 +1,15 @@
+# rubocop:disable Rails/
 class RenameKeksQuestionRemarkQuiz < ActiveRecord::Migration[5.2]
   def up
-    # rubocop:todo Rails/SkipsModelValidations
     Medium.where(sort: "KeksQuestion").update_all(sort: "Question")
-    # rubocop:enable Rails/SkipsModelValidations
-    # rubocop:todo Rails/SkipsModelValidations
     Medium.where(sort: "KeksRemark").update_all(sort: "Remark")
-    # rubocop:enable Rails/SkipsModelValidations
-    # rubocop:todo Rails/SkipsModelValidations
     Medium.where(sort: "KeksQuiz").update_all(sort: "Quiz")
-    # rubocop:enable Rails/SkipsModelValidations
   end
 
   def down
-    # rubocop:todo Rails/SkipsModelValidations
     Medium.where(sort: "Question").update_all(sort: "KeksQuestion")
-    # rubocop:enable Rails/SkipsModelValidations
-    # rubocop:todo Rails/SkipsModelValidations
     Medium.where(sort: "Remark").update_all(sort: "KeksRemark")
-    # rubocop:enable Rails/SkipsModelValidations
-    # rubocop:todo Rails/SkipsModelValidations
     Medium.where(sort: "Quiz").update_all(sort: "KeksQuiz")
-    # rubocop:enable Rails/SkipsModelValidations
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190501135815_remove_colums_from_medium.rb b/db/migrate/20190501135815_remove_colums_from_medium.rb
index efd9b1441..8e6f5067f 100644
--- a/db/migrate/20190501135815_remove_colums_from_medium.rb
+++ b/db/migrate/20190501135815_remove_colums_from_medium.rb
@@ -1,6 +1,7 @@
+# rubocop:disable Rails/
 class RemoveColumsFromMedium < ActiveRecord::Migration[6.0]
   def change
-    remove_column :media, :video_file_link, :text # rubocop:todo Rails/BulkChangeTable
+    remove_column :media, :video_file_link, :text
 
     remove_column :media, :video_stream_link, :text
 
@@ -13,3 +14,4 @@ def change
     remove_column :media, :extras_description, :text
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190507171538_add_default_locale_to_course.rb b/db/migrate/20190507171538_add_default_locale_to_course.rb
index 51c3853fd..6b94c57a5 100644
--- a/db/migrate/20190507171538_add_default_locale_to_course.rb
+++ b/db/migrate/20190507171538_add_default_locale_to_course.rb
@@ -1,7 +1,9 @@
+# rubocop:disable Rails/
 class AddDefaultLocaleToCourse < ActiveRecord::Migration[6.0]
   def change
-    Course.update_all(locale: I18n.default_locale.to_s) # rubocop:todo Rails/SkipsModelValidations
-    Lecture.update_all(locale: I18n.default_locale.to_s) # rubocop:todo Rails/SkipsModelValidations
-    User.update_all(locale: I18n.default_locale.to_s) # rubocop:todo Rails/SkipsModelValidations
+    Course.update_all(locale: I18n.default_locale.to_s)
+    Lecture.update_all(locale: I18n.default_locale.to_s)
+    User.update_all(locale: I18n.default_locale.to_s)
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190508131506_add_columns_to_notion.rb b/db/migrate/20190508131506_add_columns_to_notion.rb
index d2d757ef1..3b3b5efd1 100644
--- a/db/migrate/20190508131506_add_columns_to_notion.rb
+++ b/db/migrate/20190508131506_add_columns_to_notion.rb
@@ -1,6 +1,8 @@
+# rubocop:disable Rails/
 class AddColumnsToNotion < ActiveRecord::Migration[6.0]
   def change
-    add_column :notions, :title, :text # rubocop:todo Rails/BulkChangeTable
+    add_column :notions, :title, :text
     add_column :notions, :locale, :text
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190518161033_add_email_notifications_to_user.rb b/db/migrate/20190518161033_add_email_notifications_to_user.rb
index e49772c6e..0f67c4f3b 100644
--- a/db/migrate/20190518161033_add_email_notifications_to_user.rb
+++ b/db/migrate/20190518161033_add_email_notifications_to_user.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddEmailNotificationsToUser < ActiveRecord::Migration[6.0]
   def change
-    add_column :users, :email_notifications, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :email_notifications, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190522110318_add_mail_properties_to_user.rb b/db/migrate/20190522110318_add_mail_properties_to_user.rb
index 3265e85b7..81cfdebd8 100644
--- a/db/migrate/20190522110318_add_mail_properties_to_user.rb
+++ b/db/migrate/20190522110318_add_mail_properties_to_user.rb
@@ -1,12 +1,10 @@
+# rubocop:disable Rails/
 class AddMailPropertiesToUser < ActiveRecord::Migration[6.0]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :users, :email_for_medium, :boolean # rubocop:todo Rails/BulkChangeTable, Rails/ThreeStateBooleanColumn
-    # rubocop:enable Rails/ThreeStateBooleanColumn
-    # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :email_for_medium, :boolean
     add_column :users, :email_for_announcement, :boolean
-    # rubocop:enable Rails/ThreeStateBooleanColumn
-    add_column :users, :email_for_teachable, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :users, :email_for_news, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :email_for_teachable, :boolean
+    add_column :users, :email_for_news, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190808083830_add_open_to_clicker.rb b/db/migrate/20190808083830_add_open_to_clicker.rb
index f01614f3c..196352b41 100644
--- a/db/migrate/20190808083830_add_open_to_clicker.rb
+++ b/db/migrate/20190808083830_add_open_to_clicker.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddOpenToClicker < ActiveRecord::Migration[6.0]
   def change
-    add_column :clickers, :open, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :clickers, :open, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20190817163159_add_confirmable_to_devise_again.rb b/db/migrate/20190817163159_add_confirmable_to_devise_again.rb
index 573d9546c..8a46470e1 100644
--- a/db/migrate/20190817163159_add_confirmable_to_devise_again.rb
+++ b/db/migrate/20190817163159_add_confirmable_to_devise_again.rb
@@ -1,21 +1,21 @@
+# rubocop:disable Rails/
 class AddConfirmableToDeviseAgain < ActiveRecord::Migration[6.0]
   # NOTE: You can't use change, as User.update_all will fail in the down migration
   def up
-    add_column :users, :confirmation_token, :string # rubocop:todo Rails/BulkChangeTable
+    add_column :users, :confirmation_token, :string
     add_column :users, :confirmed_at, :datetime
     add_column :users, :confirmation_sent_at, :datetime
     add_column :users, :unconfirmed_email, :string # Only if using reconfirmable
     add_index :users, :confirmation_token, unique: true
     # To avoid a short time window between running the migration and updating all existing
     # users as confirmed, do the following
-    User.update_all confirmed_at: DateTime.now # rubocop:todo Rails/SkipsModelValidations
+    User.update_all confirmed_at: DateTime.now
     # All existing user accounts should be able to log in after this.
   end
 
   def down
-    # rubocop:todo Rails/BulkChangeTable
     remove_columns :users, :confirmation_token, :confirmed_at, :confirmation_sent_at
-    # rubocop:enable Rails/BulkChangeTable
     remove_columns :users, :unconfirmed_email # Only if using reconfirmable
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200412104751_acts_as_votable_migration.rb b/db/migrate/20200412104751_acts_as_votable_migration.rb
index a6bf63e4b..e09f1c178 100644
--- a/db/migrate/20200412104751_acts_as_votable_migration.rb
+++ b/db/migrate/20200412104751_acts_as_votable_migration.rb
@@ -1,10 +1,11 @@
+# rubocop:disable Rails/
 class ActsAsVotableMigration < ActiveRecord::Migration[6.0]
   def self.up
     create_table :votes do |t|
       t.references :votable, polymorphic: true
       t.references :voter, polymorphic: true
 
-      t.boolean :vote_flag # rubocop:todo Rails/ThreeStateBooleanColumn
+      t.boolean :vote_flag
       t.string :vote_scope
       t.integer :vote_weight
 
@@ -19,3 +20,4 @@ def self.down
     drop_table :votes
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200414170119_add_unread_comments_to_user.rb b/db/migrate/20200414170119_add_unread_comments_to_user.rb
index 46492dccc..d268ba4d0 100644
--- a/db/migrate/20200414170119_add_unread_comments_to_user.rb
+++ b/db/migrate/20200414170119_add_unread_comments_to_user.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class AddUnreadCommentsToUser < ActiveRecord::Migration[6.0]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :users, :unread_comments, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200510104347_create_item_self_join.rb b/db/migrate/20200510104347_create_item_self_join.rb
index 35bf0ab43..ba3932bec 100644
--- a/db/migrate/20200510104347_create_item_self_join.rb
+++ b/db/migrate/20200510104347_create_item_self_join.rb
@@ -1,8 +1,10 @@
+# rubocop:disable Rails/
 class CreateItemSelfJoin < ActiveRecord::Migration[6.0]
   def change
-    create_table :item_self_joins do |t| # rubocop:todo Rails/CreateTableWithTimestamps
+    create_table :item_self_joins do |t|
       t.references :item, null: false
       t.references :related_item, null: false
     end
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200521120400_add_position_to_section_tag_join.rb b/db/migrate/20200521120400_add_position_to_section_tag_join.rb
index 9f6ad52d4..fd99cb583 100644
--- a/db/migrate/20200521120400_add_position_to_section_tag_join.rb
+++ b/db/migrate/20200521120400_add_position_to_section_tag_join.rb
@@ -1,10 +1,10 @@
+# rubocop:disable Rails/
 class AddPositionToSectionTagJoin < ActiveRecord::Migration[6.0]
   def change
     add_column :section_tag_joins, :tag_position, :integer
     SectionTagJoin.all.each do |st|
-      # rubocop:todo Rails/SkipsModelValidations
       st.update_column :tag_position, st.section&.tags_order&.index(st.tag_id)
-      # rubocop:enable Rails/SkipsModelValidations
     end
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200521152416_fill_position_values_for_media.rb b/db/migrate/20200521152416_fill_position_values_for_media.rb
index b0d4fd6ff..6367f7ae7 100644
--- a/db/migrate/20200521152416_fill_position_values_for_media.rb
+++ b/db/migrate/20200521152416_fill_position_values_for_media.rb
@@ -1,27 +1,21 @@
+# rubocop:disable Rails/
 class FillPositionValuesForMedia < ActiveRecord::Migration[6.0]
   def change
     Course.all.each do |course|
-     # rubocop:todo Layout/IndentationWidth
-     course.media.order(:id).each_with_index do |medium, index|
-        # rubocop:enable Layout/IndentationWidth
-        # rubocop:todo Rails/SkipsModelValidations
-        medium.update_column :position, index # rubocop:todo Layout/IndentationWidth, Rails/SkipsModelValidations
-       # rubocop:enable Rails/SkipsModelValidations
-     end
+      course.media.order(:id).each_with_index do |medium, index|
+        medium.update_column :position, index
+      end
     end
     Lecture.all.each do |lecture|
       lecture.media.order(:id).each_with_index do |medium, index|
-       # rubocop:todo Rails/SkipsModelValidations
-       medium.update_column :position, index # rubocop:todo Layout/IndentationWidth, Rails/SkipsModelValidations
-        # rubocop:enable Rails/SkipsModelValidations
+        medium.update_column :position, index
       end
     end
     Lesson.all.each do |lesson|
       lesson.media.order(:id).each_with_index do |medium, index|
-       # rubocop:todo Rails/SkipsModelValidations
-       medium.update_column :position, index # rubocop:todo Layout/IndentationWidth, Rails/SkipsModelValidations
-        # rubocop:enable Rails/SkipsModelValidations
+        medium.update_column :position, index
       end
     end
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200531141619_add_comments_disabled_to_lecture.rb b/db/migrate/20200531141619_add_comments_disabled_to_lecture.rb
index a00b2e03b..d3a11090e 100644
--- a/db/migrate/20200531141619_add_comments_disabled_to_lecture.rb
+++ b/db/migrate/20200531141619_add_comments_disabled_to_lecture.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddCommentsDisabledToLecture < ActiveRecord::Migration[6.0]
   def change
-    add_column :lectures, :comments_disabled, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :lectures, :comments_disabled, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200606133607_add_active_to_term.rb b/db/migrate/20200606133607_add_active_to_term.rb
index a3b95371c..77224c709 100644
--- a/db/migrate/20200606133607_add_active_to_term.rb
+++ b/db/migrate/20200606133607_add_active_to_term.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class AddActiveToTerm < ActiveRecord::Migration[6.0]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :terms, :active, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200611130229_add_study_participant_to_user.rb b/db/migrate/20200611130229_add_study_participant_to_user.rb
index 5f4aec4a9..b3b93bc2a 100644
--- a/db/migrate/20200611130229_add_study_participant_to_user.rb
+++ b/db/migrate/20200611130229_add_study_participant_to_user.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class AddStudyParticipantToUser < ActiveRecord::Migration[6.0]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :users, :study_participant, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200613090342_add_text_input_to_medium.rb b/db/migrate/20200613090342_add_text_input_to_medium.rb
index d18ae41a1..e09b5c751 100644
--- a/db/migrate/20200613090342_add_text_input_to_medium.rb
+++ b/db/migrate/20200613090342_add_text_input_to_medium.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class AddTextInputToMedium < ActiveRecord::Migration[6.0]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :media, :text_input, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200809123000_add_new_design_to_user.rb b/db/migrate/20200809123000_add_new_design_to_user.rb
index 6dddc585b..7e5a223cd 100644
--- a/db/migrate/20200809123000_add_new_design_to_user.rb
+++ b/db/migrate/20200809123000_add_new_design_to_user.rb
@@ -1,5 +1,7 @@
+# rubocop:disable Rails/
 class AddNewDesignToUser < ActiveRecord::Migration[6.0]
   def change
-    add_column :users, :new_design, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :new_design, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200810162008_add_term_independent_to_course.rb b/db/migrate/20200810162008_add_term_independent_to_course.rb
index 765291637..655a06a72 100644
--- a/db/migrate/20200810162008_add_term_independent_to_course.rb
+++ b/db/migrate/20200810162008_add_term_independent_to_course.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class AddTermIndependentToCourse < ActiveRecord::Migration[6.0]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :courses, :term_independent, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200903152249_add_organizational_on_top_to_lecture.rb b/db/migrate/20200903152249_add_organizational_on_top_to_lecture.rb
index 1ea5ec5ec..c73b04279 100644
--- a/db/migrate/20200903152249_add_organizational_on_top_to_lecture.rb
+++ b/db/migrate/20200903152249_add_organizational_on_top_to_lecture.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class AddOrganizationalOnTopToLecture < ActiveRecord::Migration[6.0]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :lectures, :organizational_on_top, :boolean
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200907113337_add_disable_teacher_display_to_lecture.rb b/db/migrate/20200907113337_add_disable_teacher_display_to_lecture.rb
index 6b78d5f54..10b2eddad 100644
--- a/db/migrate/20200907113337_add_disable_teacher_display_to_lecture.rb
+++ b/db/migrate/20200907113337_add_disable_teacher_display_to_lecture.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class AddDisableTeacherDisplayToLecture < ActiveRecord::Migration[6.0]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :lectures, :disable_teacher_display, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20200927111435_add_submission_email_flags_to_user.rb b/db/migrate/20200927111435_add_submission_email_flags_to_user.rb
index 7f0888946..6f58d99fd 100644
--- a/db/migrate/20200927111435_add_submission_email_flags_to_user.rb
+++ b/db/migrate/20200927111435_add_submission_email_flags_to_user.rb
@@ -1,25 +1,17 @@
+# rubocop:disable Rails/
 class AddSubmissionEmailFlagsToUser < ActiveRecord::Migration[6.0]
   def up
-    # rubocop:todo Rails/ThreeStateBooleanColumn
-    add_column :users, :email_for_submission_upload, :boolean # rubocop:todo Rails/BulkChangeTable
-    # rubocop:enable Rails/ThreeStateBooleanColumn
-    # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :email_for_submission_upload, :boolean
     add_column :users, :email_for_submission_removal, :boolean
-    # rubocop:enable Rails/ThreeStateBooleanColumn
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :users, :email_for_submission_join, :boolean
-    # rubocop:enable Rails/ThreeStateBooleanColumn
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :users, :email_for_submission_leave, :boolean
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 
   def down
-    # rubocop:todo Rails/BulkChangeTable
     remove_column :users, :email_for_submission_upload, :boolean
-    # rubocop:enable Rails/BulkChangeTable
     remove_column :users, :email_for_submission_removal, :boolean
     remove_column :users, :email_for_submission_join, :boolean
     remove_column :users, :email_for_submission_leave, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20201002094500_change_submission_foreign_keys.rb b/db/migrate/20201002094500_change_submission_foreign_keys.rb
index 7abf5958f..6a9187293 100644
--- a/db/migrate/20201002094500_change_submission_foreign_keys.rb
+++ b/db/migrate/20201002094500_change_submission_foreign_keys.rb
@@ -1,3 +1,4 @@
+# rubocop:disable Rails/
 class ChangeSubmissionForeignKeys < ActiveRecord::Migration[6.0]
   def up
     remove_index :user_submission_joins,
@@ -22,12 +23,11 @@ def id_to_uuid(table_name, relation_name, relation_class)
     klass.where.not(foreign_key => nil).each do |record|
       next unless associated_record = relation_klass.find_by(id: record.send(foreign_key))
 
-      # rubocop:todo Rails/SkipsModelValidations
       record.update_column(new_foreign_key, associated_record.uuid)
-      # rubocop:enable Rails/SkipsModelValidations
     end
 
     remove_column table_name, foreign_key
     rename_column table_name, new_foreign_key, foreign_key
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20201002095520_set_submission_primary_key_to_uuid.rb b/db/migrate/20201002095520_set_submission_primary_key_to_uuid.rb
index 92f19b967..24f508e2d 100644
--- a/db/migrate/20201002095520_set_submission_primary_key_to_uuid.rb
+++ b/db/migrate/20201002095520_set_submission_primary_key_to_uuid.rb
@@ -1,7 +1,8 @@
+# rubocop:disable Rails/
 class SetSubmissionPrimaryKeyToUuid < ActiveRecord::Migration[6.0]
   def up
     rename_column :submissions, :id, :integer_id
-    rename_column :submissions, :uuid, :id # rubocop:todo Rails/DangerousColumnNames
+    rename_column :submissions, :uuid, :id
     execute "ALTER TABLE submissions drop constraint submissions_pkey;"
     execute "ALTER TABLE submissions ADD PRIMARY KEY (id);"
   end
@@ -10,3 +11,4 @@ def down
     raise ActiveRecord::IrreversibleMigration
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20201004141237_add_correction_email_to_user.rb b/db/migrate/20201004141237_add_correction_email_to_user.rb
index 9e7a07d20..c61a28f82 100644
--- a/db/migrate/20201004141237_add_correction_email_to_user.rb
+++ b/db/migrate/20201004141237_add_correction_email_to_user.rb
@@ -1,11 +1,11 @@
+# rubocop:disable Rails/
 class AddCorrectionEmailToUser < ActiveRecord::Migration[6.0]
   def up
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :users, :email_for_correction_upload, :boolean
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 
   def down
     remove_column :users, :email_for_correction_upload, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20201008135825_add_accepted_to_submission.rb b/db/migrate/20201008135825_add_accepted_to_submission.rb
index 1f0b9ddf6..ed8b05d32 100644
--- a/db/migrate/20201008135825_add_accepted_to_submission.rb
+++ b/db/migrate/20201008135825_add_accepted_to_submission.rb
@@ -1,9 +1,11 @@
+# rubocop:disable Rails/
 class AddAcceptedToSubmission < ActiveRecord::Migration[6.0]
   def up
-    add_column :submissions, :accepted, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :submissions, :accepted, :boolean
   end
 
   def down
     remove_column :submissions, :accepted, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20201009154917_add_email_for_submission_decisions_to_user.rb b/db/migrate/20201009154917_add_email_for_submission_decisions_to_user.rb
index d3c0e0222..fa3be5d95 100644
--- a/db/migrate/20201009154917_add_email_for_submission_decisions_to_user.rb
+++ b/db/migrate/20201009154917_add_email_for_submission_decisions_to_user.rb
@@ -1,11 +1,11 @@
+# rubocop:disable Rails/
 class AddEmailForSubmissionDecisionsToUser < ActiveRecord::Migration[6.0]
   def up
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :users, :email_for_submission_decision, :boolean
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 
   def down
     remove_column :users, :email_for_submission_decision, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20201015154231_add_archived_to_user.rb b/db/migrate/20201015154231_add_archived_to_user.rb
index 4548fcc09..8e0877e6c 100644
--- a/db/migrate/20201015154231_add_archived_to_user.rb
+++ b/db/migrate/20201015154231_add_archived_to_user.rb
@@ -1,9 +1,11 @@
+# rubocop:disable Rails/
 class AddArchivedToUser < ActiveRecord::Migration[6.0]
   def up
-    add_column :users, :archived, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :archived, :boolean
   end
 
   def down
     remove_column :users, :archived, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20201026151550_remove_redundant_columns_for_v13.rb b/db/migrate/20201026151550_remove_redundant_columns_for_v13.rb
index 86dd77767..b2674bc10 100644
--- a/db/migrate/20201026151550_remove_redundant_columns_for_v13.rb
+++ b/db/migrate/20201026151550_remove_redundant_columns_for_v13.rb
@@ -1,3 +1,4 @@
+# rubocop:disable Rails/
 class RemoveRedundantColumnsForV13 < ActiveRecord::Migration[6.0]
   def up
     remove_column :users, :edited_profile, :boolean
@@ -5,7 +6,8 @@ def up
   end
 
   def down
-    add_column :users, :edited_profile, :boolean # rubocop:todo Rails/ThreeStateBooleanColumn
+    add_column :users, :edited_profile, :boolean
     add_column :tutorial, :tutor_id, :integer
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20201121151659_add_on_main_page_to_announcement.rb b/db/migrate/20201121151659_add_on_main_page_to_announcement.rb
index f2c839131..d2bfc2e26 100644
--- a/db/migrate/20201121151659_add_on_main_page_to_announcement.rb
+++ b/db/migrate/20201121151659_add_on_main_page_to_announcement.rb
@@ -1,11 +1,11 @@
+# rubocop:disable Rails/
 class AddOnMainPageToAnnouncement < ActiveRecord::Migration[6.0]
   def up
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :announcements, :on_main_page, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 
   def down
     remove_column :announcements, :on_main_page, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20210226094753_add_release_infos_to_medium.rb b/db/migrate/20210226094753_add_release_infos_to_medium.rb
index 563a53270..21300b630 100644
--- a/db/migrate/20210226094753_add_release_infos_to_medium.rb
+++ b/db/migrate/20210226094753_add_release_infos_to_medium.rb
@@ -1,15 +1,17 @@
+# rubocop:disable Rails/
 class AddReleaseInfosToMedium < ActiveRecord::Migration[6.0]
   def up
-    add_column :media, :released_at, :datetime # rubocop:todo Rails/BulkChangeTable
+    add_column :media, :released_at, :datetime
     add_column :media, :release_date, :datetime
 
     Medium.where(released: ["all", "users", "subscribers"]).each do |m|
-      m.update_columns(released_at: m.created_at) # rubocop:todo Rails/SkipsModelValidations
+      m.update_columns(released_at: m.created_at)
     end
   end
 
   def down
-    remove_column :media, :released_at, :datetime # rubocop:todo Rails/BulkChangeTable
+    remove_column :media, :released_at, :datetime
     remove_column :media, :release_date, :datetime
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20210319102604_add_submission_deletion_columns_to_term.rb b/db/migrate/20210319102604_add_submission_deletion_columns_to_term.rb
index 20a8cfe8f..ce2375feb 100644
--- a/db/migrate/20210319102604_add_submission_deletion_columns_to_term.rb
+++ b/db/migrate/20210319102604_add_submission_deletion_columns_to_term.rb
@@ -1,13 +1,15 @@
+# rubocop:disable Rails/
 class AddSubmissionDeletionColumnsToTerm < ActiveRecord::Migration[6.0]
   def up
-    add_column :terms, :submission_deletion_mail, :datetime # rubocop:todo Rails/BulkChangeTable
+    add_column :terms, :submission_deletion_mail, :datetime
     add_column :terms, :submission_deletion_reminder, :datetime
     add_column :terms, :submissions_deleted_at, :datetime
   end
 
   def down
-    remove_column :terms, :submission_deletion_mail, :datetime # rubocop:todo Rails/BulkChangeTable
+    remove_column :terms, :submission_deletion_mail, :datetime
     remove_column :terms, :submission_deletion_reminder, :datetime
     remove_column :terms, :submissions_deleted_at, :datetime
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20210710130619_add_legacy_seminar_to_lecture.rb b/db/migrate/20210710130619_add_legacy_seminar_to_lecture.rb
index 100499006..25d0c2877 100644
--- a/db/migrate/20210710130619_add_legacy_seminar_to_lecture.rb
+++ b/db/migrate/20210710130619_add_legacy_seminar_to_lecture.rb
@@ -1,12 +1,12 @@
+# rubocop:disable Rails/
 class AddLegacySeminarToLecture < ActiveRecord::Migration[6.1]
   def up
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :lectures, :legacy_seminar, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
-    Lecture.seminar.update_all(legacy_seminar: true) # rubocop:todo Rails/SkipsModelValidations
+    Lecture.seminar.update_all(legacy_seminar: true)
   end
 
   def down
     remove_column :lectures, :legacy_seminar, :boolean, default: false
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20210710152036_add_title_and_position_to_talk.rb b/db/migrate/20210710152036_add_title_and_position_to_talk.rb
index a3ded3723..732e9bb38 100644
--- a/db/migrate/20210710152036_add_title_and_position_to_talk.rb
+++ b/db/migrate/20210710152036_add_title_and_position_to_talk.rb
@@ -1,11 +1,13 @@
+# rubocop:disable Rails/
 class AddTitleAndPositionToTalk < ActiveRecord::Migration[6.1]
   def up
-    add_column :talks, :title, :text # rubocop:todo Rails/BulkChangeTable
+    add_column :talks, :title, :text
     add_column :talks, :position, :integer
   end
 
   def down
-    remove_column :talks, :title, :text # rubocop:todo Rails/BulkChangeTable
+    remove_column :talks, :title, :text
     remove_column :talks, :position, :integer
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20210827141317_create_watchlist_entries.rb b/db/migrate/20210827141317_create_watchlist_entries.rb
index 74387db4f..edd773ddb 100644
--- a/db/migrate/20210827141317_create_watchlist_entries.rb
+++ b/db/migrate/20210827141317_create_watchlist_entries.rb
@@ -1,6 +1,7 @@
+# rubocop:disable Rails/
 class CreateWatchlistEntries < ActiveRecord::Migration[6.1]
   def up
-    create_table :watchlists # rubocop:todo Rails/CreateTableWithTimestamps
+    create_table :watchlists
 
     create_table :watchlist_entries do |t|
       t.references :watchlist, null: false, foreign_key: true
@@ -23,3 +24,4 @@ def down
     drop_table :watchlist_entries
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20210909153352_add_display_description_to_talk.rb b/db/migrate/20210909153352_add_display_description_to_talk.rb
index a54d70eec..c6275c7da 100644
--- a/db/migrate/20210909153352_add_display_description_to_talk.rb
+++ b/db/migrate/20210909153352_add_display_description_to_talk.rb
@@ -1,11 +1,11 @@
+# rubocop:disable Rails/
 class AddDisplayDescriptionToTalk < ActiveRecord::Migration[6.1]
   def up
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :talks, :display_description, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 
   def down
     remove_column :talks, :display_description, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20210923085744_add_protected_to_assignment.rb b/db/migrate/20210923085744_add_protected_to_assignment.rb
index 556c10035..2d781ffde 100644
--- a/db/migrate/20210923085744_add_protected_to_assignment.rb
+++ b/db/migrate/20210923085744_add_protected_to_assignment.rb
@@ -1,7 +1,7 @@
+# rubocop:disable Rails/
 class AddProtectedToAssignment < ActiveRecord::Migration[6.1]
   def change
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :assignments, :protected, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20210923113111_add_public_to_watchlists.rb b/db/migrate/20210923113111_add_public_to_watchlists.rb
index 450d625d8..a3f16ce64 100644
--- a/db/migrate/20210923113111_add_public_to_watchlists.rb
+++ b/db/migrate/20210923113111_add_public_to_watchlists.rb
@@ -1,11 +1,11 @@
+# rubocop:disable Rails/
 class AddPublicToWatchlists < ActiveRecord::Migration[6.1]
   def up
-    # rubocop:todo Rails/ThreeStateBooleanColumn
     add_column :watchlists, :public, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 
   def down
     remove_column :watchlists, :public, :boolean
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20220125162730_add_deletion_date_to_assignments.rb b/db/migrate/20220125162730_add_deletion_date_to_assignments.rb
index 663b0f3bf..27ca9d27d 100644
--- a/db/migrate/20220125162730_add_deletion_date_to_assignments.rb
+++ b/db/migrate/20220125162730_add_deletion_date_to_assignments.rb
@@ -1,16 +1,16 @@
+# rubocop:disable Rails/
 class AddDeletionDateToAssignments < ActiveRecord::Migration[6.1]
   def up
     default_deletion_date = (Term.active&.end_date || (Date.today + 180.days)) + 15.days
-    add_column :assignments, # rubocop:todo Rails/BulkChangeTable
+    add_column :assignments,
                :deletion_date,
                :date, null: false, default: default_deletion_date
     remove_column :assignments, :protected, :boolean
   end
 
   def down
-    remove_column :assignments, :deletion_date, :date # rubocop:todo Rails/BulkChangeTable
-    # rubocop:todo Rails/ThreeStateBooleanColumn
+    remove_column :assignments, :deletion_date, :date
     add_column :assignments, :protected, :boolean, default: false
-    # rubocop:enable Rails/ThreeStateBooleanColumn
   end
 end
+# rubocop:enable Rails/
diff --git a/db/migrate/20231101100015_add_devise_trackable_columns_to_users.rb b/db/migrate/20231101100015_add_devise_trackable_columns_to_users.rb
index 2e3140f39..b594327e6 100644
--- a/db/migrate/20231101100015_add_devise_trackable_columns_to_users.rb
+++ b/db/migrate/20231101100015_add_devise_trackable_columns_to_users.rb
@@ -1,11 +1,11 @@
+# rubocop:disable Rails/
 class AddDeviseTrackableColumnsToUsers < ActiveRecord::Migration[7.0]
   def change
-    # rubocop:todo Rails/BulkChangeTable
     add_column :users, :sign_in_count, :integer, default: 0, null: false
-    # rubocop:enable Rails/BulkChangeTable
     add_column :users, :current_sign_in_at, :datetime
     add_column :users, :last_sign_in_at, :datetime
     add_column :users, :current_sign_in_ip, :string
     add_column :users, :last_sign_in_ip, :string
   end
 end
+# rubocop:enable Rails/