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  class User < ActiveRecord::Base
    def self.authenticate_unsafely(user_name, password)
      find(:first, :conditions => "user_name = '#{user_name}' AND password = '#{password}'")
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def upgrade_and_restart
  @myvocabulary.upgrade
  nextmyvocabulary = Myvocabulary.draw(current_user.id, params[:position], @myvocabulary.vocabulary.lesson.proficiency.id)
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def before_create_save(record)
  vouchercode = generate_vouchercode(8)
  while Voucher.find(:first, :conditions => {:vouchercode => vouchercode})
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