Ticket #27979: 27979.diff

django/db/backends/mysql/base.py

@@ -57 +57 @@
     Implemented as a wrapper, rather than a subclass, so that it isn't stuck
     to the particular underlying representation returned by Connection.cursor().
     """
-    codes_for_integrityerror = (1048,)
+    codes_for_integrityerror = (
+        1048,  # Column cannot be null
+        1690,  # BIGINT UNSIGNED value is out of range
+    )
 
     def __init__(self, cursor):
         self.cursor = cursor

tests/model_fields/test_integerfield.py

@@ -1 +1 @@
 from django.core import validators
 from django.core.exceptions import ValidationError
-from django.db import connection, models
+from django.db import IntegrityError, connection, models
 from django.test import SimpleTestCase, TestCase
 
 from .models import (
@@ -151 +151 @@
     model = PositiveIntegerModel
     documented_range = (0, 2147483647)
 
+    def test_negative_values(self):
+        p = PositiveIntegerModel.objects.create(value=0)
+        p.value = models.F('value') - 1
+        with self.assertRaises(IntegrityError):
+           p.save()
+
 
 class ValidationTests(SimpleTestCase):