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OnlineMigrations v0.5.2 Release Notes

Release Date: 2022-10-04 // almost 2 years ago

    • 🛠 Fix sequence resetting in tests that use fixtures

    • Fix update_column_in_batches for SQL subquery values

      It generated inefficient queries before, e.g.:

      update_column_in_batches(:users, :comments_count, Arel.sql(<<~SQL))
  (select count(*) from comments where comments.user_id = users.id)
SQL

      Generated SQL queries before:

      update users
set comments_count = (..count subquery..)
where comments_count is null or comments_count != (..count subquery..)

      Generated SQL queries now:

      update users set comments_count = (..count subquery..)

    • 🛠 Fix check for add_column with default: nil for PostgreSQL < 11

    • Replacing a unique index when other unique index with the prefix of columns exists is safe


Previous changes from v0.5.1

    • Raise for possible index corruption in all environments (previously, the check was made only in the production environment)