diff --git a/app/controllers/notifications_controller.rb b/app/controllers/notifications_controller.rb
index 9d167647..4ad39cce 100644
--- a/app/controllers/notifications_controller.rb
+++ b/app/controllers/notifications_controller.rb
@@ -1,9 +1,11 @@
+# frozen_string_literal: true
+
 class NotificationsController < ApplicationController
   before_action :authenticate_user!
 
   TYPE_MAPPINGS = {
-    'smile'    => 'appendable::reaction',
-    'reaction' => 'appendable::reaction',
+    "smile"    => "appendable::reaction",
+    "reaction" => "appendable::reaction"
   }.freeze
 
   def index
@@ -24,9 +26,9 @@ class NotificationsController < ApplicationController
     cursor_params = { last_id: last_id, size: size }.compact
 
     case type
-    when 'all'
+    when "all"
       Notification.cursored_for(current_user, **cursor_params)
-    when 'new'
+    when "new"
       Notification.cursored_for(current_user, new: true, **cursor_params)
     else
       Notification.cursored_for_type(current_user, type, **cursor_params)
diff --git a/app/models/appendable/reaction.rb b/app/models/appendable/reaction.rb
index fc253fc3..df498b18 100644
--- a/app/models/appendable/reaction.rb
+++ b/app/models/appendable/reaction.rb
@@ -1,6 +1,7 @@
 # frozen_string_literal: true
 
 class Appendable::Reaction < Appendable
+  # rubocop:disable Rails/SkipsModelValidations
   after_create do
     Notification.notify parent.user, self unless parent.user == user
     user.increment! :smiled_count
@@ -12,6 +13,7 @@ class Appendable::Reaction < Appendable
     user.decrement! :smiled_count
     parent.decrement! :smile_count
   end
+  # rubocop:enable Rails/SkipsModelValidations
 
   def notification_type(*_args)
     Notifications::Smiled
diff --git a/db/migrate/20220216150127_move_smiles_to_appendables.rb b/db/migrate/20220216150127_move_smiles_to_appendables.rb
index df3d9789..56479ad5 100644
--- a/db/migrate/20220216150127_move_smiles_to_appendables.rb
+++ b/db/migrate/20220216150127_move_smiles_to_appendables.rb
@@ -1,3 +1,5 @@
+# frozen_string_literal: true
+
 class MoveSmilesToAppendables < ActiveRecord::Migration[6.1]
   def up
     execute "INSERT INTO appendables (type, user_id, parent_id, parent_type, content, created_at, updated_at)