class Table
  include SimplyStored::Couch

  property :number, type: Fixnum, default: 1

  belongs_to :supplier
  has_many :lists

  validates :supplier_id, presence: true
  #validates :list_id, presence: true
  validates :number, numericality: {greater_than: 0}

  view :active_lists, type: :custom, map_function: %|function(doc){
    if(doc.ruby_class == 'List' && doc.state == 'active'){
      emit(doc._id, 1); 
    }
  }|, reduce_function: '_sum'

  def occupied?
    not self.class.database.view(self.class.active_lists(key: list_id, reduce: true)).zero?
  end

end