Fixed #16137 - Removed kwargs requirement for QuerySet.get_or_create

Thanks wilfred@, poirier, and charettes for work
on the patch.

tests/get_or_create/tests.py

@@ -8,7 +8,7 @@ from django.db import IntegrityError, DatabaseError
 from django.utils.encoding import DjangoUnicodeDecodeError
 from django.test import TestCase, TransactionTestCase
 
-from .models import Person, ManualPrimaryKeyTest, Profile, Tag, Thing
+from .models import DefaultPerson, Person, ManualPrimaryKeyTest, Profile, Tag, Thing
 
 
 class GetOrCreateTests(TestCase):
@@ -83,6 +83,14 @@ class GetOrCreateTests(TestCase):
         else:
             self.skipTest("This backend accepts broken utf-8.")
 
+    def test_get_or_create_empty(self):
+        # Regression test for #16137: get_or_create does not require kwargs.
+        try:
+            DefaultPerson.objects.get_or_create()
+        except AssertionError:
+            self.fail("If all the attributes on a model have defaults, we "
+                      "shouldn't need to pass any arguments.")
+
 
 class GetOrCreateTransactionTests(TransactionTestCase):