rename from sibling_columns to surroundings

app/models/column.rb

@@ -6,10 +6,5 @@ class Column < ApplicationRecord
   has_many :cards, dependent: :nullify
 
   after_save_commit    -> { cards.touch_all }, if: -> { saved_change_to_name? || saved_change_to_color? }
-  after_create_commit  -> { sibling_columns.touch_all }
-  after_destroy_commit -> { board.cards.touch_all; sibling_columns.touch_all }
-
-  def sibling_columns
-    board.columns.where.not(id:).sorted
-  end
+  after_destroy_commit -> { board.cards.touch_all }
 end

app/models/column/positioned.rb

@@ -5,6 +5,8 @@ module Column::Positioned
     scope :sorted, -> { order(position: :asc) }
 
     before_create :set_position
+    after_create_commit -> { surroundings.touch_all }
+    after_destroy_commit -> { surroundings.touch_all }
   end
 
   def move_left
@@ -31,6 +33,10 @@ module Column::Positioned
     right_column.nil?
   end
 
+  def surroundings
+    board.columns.where(id: [ left_column&.id, right_column&.id ].compact)
+  end
+
   private
     def set_position
       max_position = board.columns.maximum(:position) || 0