class Group < ActiveRecord::Base attr_accessible :name, :active, :comment has_many :group_memberships, :dependent => :destroy has_many :group_permissions, :dependent => :destroy has_many :permittances, :foreign_key => :target_group_id, :class_name => "GroupPermission", :dependent => :destroy validates :name, :presence => true def to_s self.name end def permission_targets(permission) group_permissions.where(:permission => permission).pluck(:target_group_id) end def has_permission(target_type, target_id, permission) target_group_ids = GroupMembership.where(:item_id => target_id, :item_type => target_type).pluck(:group_id) return group_permissions.where(:permission => permission, :target_group_id => target_group_ids).first != nil end def self.union(sets=[]) group_ids = [] sets.each do |set| group_ids = group_ids + set end return group_ids.uniq end end