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table.foreign_keys now handles compound foreign keys, refs #594

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This is a breaking change, since the return type is now a dataclass
and not a namedtuple.
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Simon Willison 2026-07-05 13:59:25 -07:00
commit f10459cffb
5 changed files with 232 additions and 36 deletions
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9
docs/changelog.rst
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@ -4,6 +4,15 @@
Changelog
===========
.. _v_unreleased:
Unreleased
----------
Breaking changes:
- ``table.foreign_keys`` now returns ``ForeignKey`` objects that are dataclasses rather than ``namedtuple`` instances, so they can no longer be unpacked or indexed as ``(table, column, other_table, other_column)`` tuples - access their fields by name instead. Compound (multi-column) foreign keys are now represented as a single ``ForeignKey`` with ``is_compound=True`` and populated ``columns``/``other_columns`` lists, where ``column`` and ``other_column`` are ``None``. Previously they were returned as one ``ForeignKey`` per column, misleadingly suggesting several independent foreign keys. See :ref:`upgrading_3_to_4` for details. (:issue:`594`)
.. _v4_0rc2:
4.0rc2 (2026-07-04)