Fixed #17653 -- Changed MySQL backend to raise a ValueError if zero is used as an AutoField value.

Thanks to Sylvain Lebon for the report, krzysiumed for the patch and charettes and claudep for reviews.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@17933 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/bulk_create/tests.py

@@ -2,7 +2,7 @@ from __future__ import absolute_import
 
 from operator import attrgetter
 
-from django.test import TestCase, skipUnlessDBFeature
+from django.test import TestCase, skipIfDBFeature, skipUnlessDBFeature
 
 from .models import Country, Restaurant, Pizzeria, State
 
@@ -56,4 +56,16 @@ class BulkCreateTests(TestCase):
             ])
         self.assertQuerysetEqual(State.objects.order_by("two_letter_code"), [
             "CA", "IL", "ME", "NY",
-        ], attrgetter("two_letter_code"))
+        ], attrgetter("two_letter_code"))
+
+    @skipIfDBFeature('allows_primary_key_0')
+    def test_zero_as_autoval(self):
+        """
+        Zero as id for AutoField should raise exception in MySQL, because MySQL
+        does not allow zero for automatic primary key.
+        """
+
+        valid_country = Country(name='Germany', iso_two_letter='DE')
+        invalid_country = Country(id=0, name='Poland', iso_two_letter='PL')
+        with self.assertRaises(ValueError):
+            Country.objects.bulk_create([valid_country, invalid_country])