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after_destroy_cleanup

🧹 Cleaning Up Related Records in after_destroy​

Use after_destroy to perform cleanup tasks for records that should be removed after a model is deleted. Make sure the callback won’t interfere with database integrity.

class User < ApplicationRecord
  after_destroy :remove_avatar_file

  private

  def remove_avatar_file
    File.delete(avatar_path) if avatar_path && File.exist?(avatar_path)
  end
end

This callback deletes the user’s avatar file from disk when the user record is destroyed.