openproject/modules/global_roles/app/models/principal_role.rb

#-- copyright
# OpenProject Global Roles Plugin
#
# Copyright (C) 2010 - 2014 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# version 3.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#++

class PrincipalRole < ActiveRecord::Base
  belongs_to :principal
  belongs_to :role
  validate :validate_assignable

  def validate_assignable
    add_error_can_not_be_assigned unless role.assignable_to?(principal)
  end

  private

  def add_error_can_not_be_assigned
    errors[:base] << l(:error_can_not_be_assigned)
  end
end