[pull] main from django:main#272
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pull[bot] merged 3 commits intothreatcode:mainfrom Jan 29, 2026
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Ever since the beginning of Django's migration framework, there's been a bit of an inconsistency on how index_together and unique_together values have been stored on the ModelState[^1]. It's only really obvious, when looking at the current code for `from_model()`[^2] and the `rename_field()` state alteration code[^3]. The problem in the autodetector's detection of the `*_together` options as raised in the ticket, reinforces the inconsistency[^4]: the old value is being normalized to a set of tuples, whereas the new value is taken as-is. Why this hasn't been caught before, is likely to the fact, that we never really look at a `to_state` that comes from migration operations in the autodetector. Instead, in both usages in Django[^5], [^6] the `to_state` is a `ProjectState.from_apps()`. And that state is consistently using sets of tuples and not lists of lists. [^1]: 67dcea7#diff-5dd147e9e978e645313dd99eab3a7bab1f1cb0a53e256843adb68aeed71e61dcR85-R87 [^2]: https://github.com/django/django/blob/b1ffa9a9d78b0c2c5ad6ed5a1d84e380d5cfd010/django/db/migrations/state.py#L842 [^3]: https://github.com/django/django/blob/b1ffa9a9d78b0c2c5ad6ed5a1d84e380d5cfd010/django/db/migrations/state.py#L340-L345 [^4]: https://github.com/django/django/blob/b1ffa9a9d78b0c2c5ad6ed5a1d84e380d5cfd010/django/db/migrations/autodetector.py#L1757-L1771 [^5]: https://github.com/django/django/blob/2351c1b12cc9cf82d642f769c774bc3ea0cc4006/django/core/management/commands/makemigrations.py#L215-L219 [^6]: https://github.com/django/django/blob/2351c1b12cc9cf82d642f769c774bc3ea0cc4006/django/core/management/commands/migrate.py#L329-L332
… SQLite. Co-authored-by: Simon Charette <charette.s@gmail.com> Co-authored-by: Jacob Walls <jacobtylerwalls@gmail.com>
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