id	summary	reporter	owner	description	type	status	component	version	severity	resolution	keywords	cc	stage	has_patch	needs_docs	needs_tests	needs_better_patch	easy	ui_ux
36062	Deserializing CompositePrimaryKey from a string raises  raises ValueError	Jacob Walls	Sarah Boyce	"Adjusting this test (for a roundtrip from a serialized string and back) to use `CompositePrimaryKey` produces a failure:
{{{#!diff
diff --git a/tests/serializers/models/base.py b/tests/serializers/models/base.py
index e4fcee366d..63c3590113 100644
--- a/tests/serializers/models/base.py
+++ b/tests/serializers/models/base.py
@@ -99,6 +99,7 @@ class Actor(models.Model):
 
 
 class Movie(models.Model):
+    pk = models.CompositePrimaryKey(""actor"", ""title"", ""price"")
     actor = models.ForeignKey(Actor, models.CASCADE)
     title = models.CharField(max_length=50)
     price = models.DecimalField(max_digits=6, decimal_places=2, default=Decimal(""0.00""))
}}}
{{{
ERROR: test_serialize_unicode_roundtrip (serializers.test_xml.XmlSerializerTestCase.test_serialize_unicode_roundtrip)
Unicode makes the roundtrip intact
----------------------------------------------------------------------
Traceback (most recent call last):
  File ""/Users/.../django/tests/serializers/tests.py"", line 241, in test_serialize_unicode_roundtrip
    obj_list = list(serializers.deserialize(self.serializer_name, serial_str))
               ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/Users/.../django/django/core/serializers/xml_serializer.py"", line 214, in __next__
    return self._handle_object(node)
           ^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/Users/.../django/django/core/serializers/xml_serializer.py"", line 289, in _handle_object
    obj = base.build_instance(Model, data, self.db)
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ""/Users/.../django/django/core/serializers/base.py"", line 325, in build_instance
    return Model(**data)
           ^^^^^^^^^^^^^
  File ""/Users/.../django/django/db/models/base.py"", line 566, in __init__
    _setattr(self, prop, value)
  File ""/Users/.../django/django/db/models/fields/composite.py"", line 36, in __set__
    raise ValueError(f""{self.field.name!r} must be a list or a tuple."")
ValueError: 'pk' must be a list or a tuple.

----------------------------------------------------------------------
Ran 212 tests in 7.973s

FAILED (errors=1)
}}}

Other unit tests using other test models fail if adjusted in the same way, so this is not isolated to the xml serializer."	Bug	closed	Core (Serialization)	dev	Release blocker	fixed		Csirmaz Bendegúz	Ready for checkin	1	0	0	0	0	0