authorize_mass_actions.rb

def authorize_mass_actions local_action
  policy_name = if ['read_all', 'move_to_inbox', 'restore_messages'].include?(local_action)
    :update?
  else
    :destroy?
  end

  Message.with_deleted.where(id: params[:messages_ids]).each do |message|
    authorize(message, policy_name)
  end
end