Rails: Devise user soft deletion with custom error on sign in.

Devise user soft deletion

1. Add deleted_at column to User model.
2. Add to User model:
  def soft_delete
    update_attribute(:deleted_at, Time.current)
  end

  def active_for_authentication?
    super && !self.deleted_at
  end

  def inactive_message
    self.deleted_at ? :deleted : super
  end
3. Create registration controller and overwrite destroy:
class RegistrationsController < Devise::RegistrationsController
  def destroy
    resource.soft_delete #owerwrited from resource.destroy
    Devise.sign_out_all_scopes ? sign_out : sign_out(resource_name)
    set_flash_message :notice, :destroyed if is_flashing_format?
    yield resource if block_given?
    respond_with_navigational(resource){ redirect_to after_sign_out_path_for(resource_name) }
  end
end
4. Add route:
devise_for :users, :controllers => { :registrations => 'registrations' }
5. Add error message to devise.en.yml:
en:
  devise:
    failure:
      deleted: "Your account is marked as deleted. You can recover it."