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Clarify use of unscoped when backfilling #235

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Clarify use of unscoped when backfilling #235

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1 change: 1 addition & 0 deletions README.md
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Expand Up @@ -195,6 +195,7 @@ class BackfillSomeColumn < ActiveRecord::Migration[7.0]
end
end
```
Note: When introducing new columns to models with a default_scope (e.g., with soft deletion), employ `unscoped` to backfill and update all rows comprehensively. This guards against potential problems when executing unscoped queries without the default column being appropriately set.

### Adding a stored generated column

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