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educoder/db/migrate/20191115070841_transfer_lab...

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