Fixed #31301 -- Fixed crash of QuerySet.bulk_create() with mixed empty and set ForeignKeys to AutoFields on Oracle.

django/db/backends/oracle/utils.py

@@ -62,6 +62,8 @@ class BulkInsertMapper:
     TIMESTAMP = 'TO_TIMESTAMP(%s)'
 
     types = {
+        'AutoField': NUMBER,
+        'BigAutoField': NUMBER,
         'BigIntegerField': NUMBER,
         'BinaryField': BLOB,
         'BooleanField': NUMBER,
@@ -75,6 +77,7 @@ class BulkInsertMapper:
         'PositiveBigIntegerField': NUMBER,
         'PositiveIntegerField': NUMBER,
         'PositiveSmallIntegerField': NUMBER,
+        'SmallAutoField': NUMBER,
         'SmallIntegerField': NUMBER,
         'TextField': CLOB,
         'TimeField': TIMESTAMP,

tests/bulk_create/models.py

@@ -64,6 +64,14 @@ class NoFields(models.Model):
     pass
 
 
+class SmallAutoFieldModel(models.Model):
+    id = models.SmallAutoField(primary_key=True)
+
+
+class BigAutoFieldModel(models.Model):
+    id = models.BigAutoField(primary_key=True)
+
+
 class NullableFields(models.Model):
     # Fields in db.backends.oracle.BulkInsertMapper
     big_int_filed = models.BigIntegerField(null=True, default=1)
@@ -81,6 +89,9 @@ class NullableFields(models.Model):
     positive_small_integer_field = models.PositiveSmallIntegerField(null=True, default=4)
     small_integer_field = models.SmallIntegerField(null=True, default=5)
     time_field = models.TimeField(null=True, default=timezone.now)
+    auto_field = models.ForeignKey(NoFields, on_delete=models.CASCADE, null=True)
+    small_auto_field = models.ForeignKey(SmallAutoFieldModel, on_delete=models.CASCADE, null=True)
+    big_auto_field = models.ForeignKey(BigAutoFieldModel, on_delete=models.CASCADE, null=True)
     # Fields not required in BulkInsertMapper
     char_field = models.CharField(null=True, max_length=4, default='char')
     email_field = models.EmailField(null=True, default='user@example.com')

tests/bulk_create/tests.py

@@ -9,9 +9,9 @@ from django.test import (
 )
 
 from .models import (
-    Country, NoFields, NullableFields, Pizzeria, ProxyCountry,
-    ProxyMultiCountry, ProxyMultiProxyCountry, ProxyProxyCountry, Restaurant,
-    State, TwoFields,
+    BigAutoFieldModel, Country, NoFields, NullableFields, Pizzeria,
+    ProxyCountry, ProxyMultiCountry, ProxyMultiProxyCountry, ProxyProxyCountry,
+    Restaurant, SmallAutoFieldModel, State, TwoFields,
 )
 
 
@@ -234,10 +234,16 @@ class BulkCreateTests(TestCase):
 
     @skipUnlessDBFeature('has_bulk_insert')
     def test_bulk_insert_nullable_fields(self):
+        fk_to_auto_fields = {
+            'auto_field': NoFields.objects.create(),
+            'small_auto_field': SmallAutoFieldModel.objects.create(),
+            'big_auto_field': BigAutoFieldModel.objects.create(),
+        }
         # NULL can be mixed with other values in nullable fields
         nullable_fields = [field for field in NullableFields._meta.get_fields() if field.name != 'id']
         NullableFields.objects.bulk_create([
-            NullableFields(**{field.name: None}) for field in nullable_fields
+            NullableFields(**{**fk_to_auto_fields, field.name: None})
+            for field in nullable_fields
         ])
         self.assertEqual(NullableFields.objects.count(), len(nullable_fields))
         for field in nullable_fields: