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class PhoneNumberRange < ActiveRecord::Base
attr_accessible :name, :description
has_many :phone_numbers, :as => :phone_numberable, :dependent => :destroy
belongs_to :phone_number_rangeable, :polymorphic => true
validates_presence_of :name
validates_uniqueness_of :name, :scope => [:phone_number_rangeable_id, :phone_number_rangeable_type]
validates_inclusion_of :name, :in => [INTERNAL_EXTENSIONS, DIRECT_INWARD_DIALING_NUMBERS, SERVICE_NUMBERS]
validates_presence_of :phone_number_rangeable_id
validates_presence_of :phone_number_rangeable
def to_s
name
end
end
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