rosa-build/app/models/group.rb

class Group < ActiveRecord::Base
  belongs_to :owner, :class_name => 'User'

  has_many :own_projects, :as => :owner, :class_name => 'Project'

  has_many :relations, :as => :object, :dependent => :destroy
  has_many :objects, :as => :target, :class_name => 'Relation'
  has_many :targets, :as => :object, :class_name => 'Relation'
  has_many :roles, :through => :targets

  has_many :members,      :through => :objects, :source => :object, :source_type => 'User',       :autosave => true
  has_many :projects,     :through => :targets, :source => :target, :source_type => 'Project',    :autosave => true
  has_many :platforms,    :through => :targets, :source => :target, :source_type => 'Platform',   :autosave => true
  has_many :repositories, :through => :targets, :source => :target, :source_type => 'Repository', :autosave => true

  validates :name, :owner, :presence => true
  validates :uname, :presence => true, :uniqueness => {:case_sensitive => false}, :format => { :with => /^[a-z0-9_]+$/ }, :allow_nil => false, :allow_blank => false
  validate { errors.add(:uname, :taken) if User.where('uname LIKE ?', uname).present? }

  attr_readonly :uname

  delegate :ssh_key, :to => :owner

  include PersonalRepository

  after_create :make_owner_rel
  before_save :check_owner_rel

  protected

  def make_owner_rel
    r = relations.build :object_id => owner.id, :object_type => 'User', :role => 'admin'
    r.save
  end

  def check_owner_rel
    if !new_record? and owner_id_changed?
      relations.by_object(owner).delete_all if owner_type_was
      make_owner_rel if owner
    end
  end

end