seanmuth commented on issue #69980:
URL: https://github.com/apache/airflow/issues/69980#issuecomment-4995719247
PR #69985 opened.
Per discussion with @dstandish, the fix **hotfixes migration `0094` in
place** so it correctly extended-serializes nested callback kwargs on future
upgrades (both the Postgres CTE and the MySQL/SQLite paths, with the downgrade
paths decoding back to raw to preserve the round-trip).
Repairing **already-corrupted** `callback.data` rows (deployments that have
already run `0094` with nested-dict callback kwargs) is intentionally left to
end-users / managed services rather than shipping a data-repair migration.
Affected rows can be found with:
```sql
SELECT count(*) FROM callback c
WHERE jsonb_path_exists(c.data::jsonb, '$.**.__var.* ? (@.type()=="object"
&& !exists(@.__type))');
```
and re-encoded so nested dicts are wrapped as `{"__type": "dict", "__var":
{...}}`.
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