app/models/sip_registration.rb


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class SipRegistration < ActiveRecord::Base  
  # Makes sure that this is a readonly model.
  def readonly?
    return true
  end
 
  # Prevent objects from being destroyed
  def before_destroy
    raise ActiveRecord::ReadOnlyRecord
  end

  # Prevent objects from being deleted
  def self.delete_all
    raise ActiveRecord::ReadOnlyRecord
  end

  # Prevent objects from being deleted
  def delete
    raise ActiveRecord::ReadOnlyRecord
  end
end