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							class TransferLaboratoryData < ActiveRecord::Migration[5.2]
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							  def change
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							    Course.where(laboratory_id: nil).update_all(laboratory_id: 1)
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							    Competition.where(laboratory_id: nil).update_all(laboratory_id: 1)
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							    Library.where(laboratory_id: nil).update_all(laboratory_id: 1)
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							  end
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							end
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