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Editorial Team
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Asked: 2026-06-07T00:13:48+00:00

If I have two migrations, the first one adds a column, and the second

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If I have two migrations, the first one adds a column, and the second one insert value into that column, would I still need to call reset_column_information manually at the end of first migration?

or rephrasing the question: is reset_column_information called automatically after each migration?

I am on Rails 3.2.3, and I believe it used to call reset_column_information after each migration. However recently I found out that some values are missing when I insert it into anewly created column. The two migrations are run during one rake task. I think this is a bug but just want some clarification.

Update:

I have created a demo app to demonstrate the issue: https://github.com/lulalala/migration-bug. The readme shows the step to prepare and reproduce it. I think it is probably a bug and have file it.

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1 Answer

  1. Editorial Team

    According to this comment from Rails issues, Rails 3.2.6 only get a fresh copy of database scheme each time you run rake db:migrate. So runnning one migration at a time may help bypass the issue that some new column is not being updated.

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