Fixed #22669 -- Fixed QuerySet.bulk_create() with empty model fields on Oracle.

tests/bulk_create/models.py

@@ -1,4 +1,9 @@
+import datetime
+import uuid
+from decimal import Decimal
+
 from django.db import models
+from django.utils import timezone
 
 
 class Country(models.Model):
@@ -51,3 +56,32 @@ class TwoFields(models.Model):
 
 class NoFields(models.Model):
     pass
+
+
+class NullableFields(models.Model):
+    # Fields in db.backends.oracle.BulkInsertMapper
+    big_int_filed = models.BigIntegerField(null=True, default=1)
+    binary_field = models.BinaryField(null=True, default=b'data')
+    date_field = models.DateField(null=True, default=timezone.now)
+    datetime_field = models.DateTimeField(null=True, default=timezone.now)
+    decimal_field = models.DecimalField(null=True, max_digits=2, decimal_places=1, default=Decimal('1.1'))
+    duration_field = models.DurationField(null=True, default=datetime.timedelta(1))
+    float_field = models.FloatField(null=True, default=3.2)
+    integer_field = models.IntegerField(null=True, default=2)
+    null_boolean_field = models.NullBooleanField(null=True, default=False)
+    positive_integer_field = models.PositiveIntegerField(null=True, default=3)
+    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)
+    # 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')
+    duration_field = models.DurationField(null=True, default=datetime.timedelta(1))
+    file_field = models.FileField(null=True, default='file.txt')
+    file_path_field = models.FilePathField(path='/tmp', null=True, default='file.txt')
+    generic_ip_address_field = models.GenericIPAddressField(null=True, default='127.0.0.1')
+    image_field = models.ImageField(null=True, default='image.jpg')
+    slug_field = models.SlugField(null=True, default='slug')
+    text_field = models.TextField(null=True, default='text')
+    url_field = models.URLField(null=True, default='/')
+    uuid_field = models.UUIDField(null=True, default=uuid.uuid4)