Extract attachable concerns

app/models/tag.rb

@@ -1,5 +1,5 @@
 class Tag < ApplicationRecord
-  include ActionText::Attachable, Filterable
+  include Attachable, Filterable
 
   has_many :taggings, dependent: :destroy
   has_many :cards, through: :taggings
@@ -13,9 +13,4 @@ class Tag < ApplicationRecord
   def hashtag
     "#" + title
   end
-
-  # TODO: Move to attachable along with the concern
-  def attachable_plain_text_representation(...)
-    "##{title}"
-  end
 end

app/models/tag/attachable.rb

@@ -0,0 +1,11 @@
+module Tag::Attachable
+  extend ActiveSupport::Concern
+
+  included do
+    include ActionText::Attachable
+  end
+
+  def attachable_plain_text_representation(...)
+    "##{title}"
+  end
+end

app/models/user.rb

@@ -1,5 +1,5 @@
 class User < ApplicationRecord
-  include Accessor, ActionText::Attachable, Assignee, Mentionable, Named, Role, Searcher,
+  include Accessor, Attachable, Assignee, Mentionable, Named, Role, Searcher,
     SignalUser, Transferable
   include Timelined # Depends on Accessor
 
@@ -26,11 +26,6 @@ class User < ApplicationRecord
     update! active: false, email_address: deactived_email_address
   end
 
-  # TODO: Move to attachable along with the concern
-  def attachable_plain_text_representation(...)
-    "@#{first_name.downcase}"
-  end
-
   private
     def deactived_email_address
       email_address.sub(/@/, "-deactivated-#{SecureRandom.uuid}@")

app/models/user/attachable.rb

@@ -0,0 +1,11 @@
+module User::Attachable
+  extend ActiveSupport::Concern
+
+  included do
+    include ActionText::Attachable
+  end
+
+  def attachable_plain_text_representation(...)
+    "@#{first_name.downcase}"
+  end
+end