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Code Issues 32 Releases Wiki Activity

[6.0.x] Fixed #36611, Refs #36580 -- Added system check for multicolumn ForeignObject in Meta.indexes/constraints/unique_together.

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ForeignObjects with multiple `from_fields` are not supported in these
options.

Co-authored-by: Jacob Walls <jacobtylerwalls@gmail.com>
Co-authored-by: Natalia <124304+nessita@users.noreply.github.com>

Backport of 5b51e6f759 from main.
This commit is contained in:
Sarah Boyce
2025-09-19 16:27:51 +02:00
committed by Natalia
parent 86e7406cfb
commit 0fa339ce71
4 changed files with 69 additions and 0 deletions
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3
docs/ref/checks.txt
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@@ -443,6 +443,9 @@ Models
* **models.E048**: ``constraints/indexes/unique_together`` refers to a
``CompositePrimaryKey`` ``<field name>``, but ``CompositePrimaryKey``\s are
not supported for that option.
* **models.E049**: ``constraints/indexes/unique_together`` refers to a
``ForeignObject`` ``<field name>`` with multiple ``from_fields``, which is
not supported for that option.
Management Commands
-------------------

4
docs/releases/6.0.txt
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@@ -295,6 +295,10 @@ Models
don't support it (MySQL and MariaDB), the fields are marked as deferred to
trigger a refresh on subsequent accesses.
* Using a :ref:`ForeignObject <cpk-and-relations>` with multiple
``from_fields`` in Model indexes, constraints, or :attr:`unique_together
<django.db.models.Options.unique_together>` now emits a system check error.
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