class Forum < ActiveRecord::Base
  include Redmine::SafeAttributes
  has_many :topics, :class_name => 'Memo', :conditions => "#{Memo.table_name}.parent_id IS NULL", :order => "#{Memo.table_name}.created_at DESC"
  has_many :memos, :dependent => :destroy
  belongs_to :creator, :class_name => "User", :foreign_key => 'creator_id' 
  safe_attributes 'name',
                  'description',
                  'topic_count',
                  'memo_count',
                  'last_memo_id',
                  'creator_id'
  validates_presence_of :name, :creator_id
  validates_length_of :name, maximum: 50
  validates_length_of :description, maximum: 255
  validates :name, :uniqueness => true
  
  acts_as_taggable
  scope :by_join_date, order("created_at DESC")
  
end