soft_deletable.rb

module SoftDeletable
  extend ActiveSupport::Concern

  def soft_delete!
    find_each do |record|
      record.soft_delete!
    end
  end

  included do
    scope :deleted, where("#{table_name}.deleted_at IS NOT NULL")

    define_model_callbacks :soft_delete

    def soft_delete!
      run_callbacks :soft_delete do
        self.deleted_at = Time.now
        save!(validate: false)
      end            
    end

    def restore!
      self.deleted_at = nil
      save!(validate: false)      
    end

    def deleted?
      deleted_at.present?
    end
  end
end