educoder/db/migrate/20190613022158_add_exec_tim...

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238 B

6 years ago
class AddExecTimeToChallenge < ActiveRecord::Migration[5.2]
def change
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add_column :challenges, :exec_time, :integer
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Shixun.find_each do |shixun|
shixun.challenges.update_all(exec_time: shixun.exec_time)
end
end
end