Fixed #11381 -- `GeoManager` + `select_related` + nullable `ForeignKey` now works correctly. Thanks, bretthoerner for ticket and dgouldin for initial patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@11123 bcc190cf-cafb-0310-a4f2-bffc1f526a37

django/contrib/gis/db/models/sql/query.py

@@ -225,7 +225,7 @@ class GeoQuery(sql.Query):
                 values.append(self.convert_values(value, field))
         else:
             values.extend(row[index_start:])
-        return values
+        return tuple(values)
 
     def convert_values(self, value, field):
         """

django/contrib/gis/tests/relatedapp/models.py

@@ -40,5 +40,5 @@ class Author(models.Model):
 
 class Book(models.Model):
     title = models.CharField(max_length=100)
-    author = models.ForeignKey(Author, related_name='books')
+    author = models.ForeignKey(Author, related_name='books', null=True)
     objects = models.GeoManager()

django/contrib/gis/tests/relatedapp/tests.py

@@ -257,6 +257,13 @@ class RelatedGeoModelTest(unittest.TestCase):
         self.assertEqual(1, len(qs))
         self.assertEqual(3, qs[0].num_books)
 
+    def test13_select_related_null_fk(self):
+        "Testing `select_related` on a nullable ForeignKey via `GeoManager`. See #11381."
+        no_author = Book.objects.create(title='Without Author')
+        b = Book.objects.select_related('author').get(title='Without Author')
+        # Should be `None`, and not a 'dummy' model.
+        self.assertEqual(None, b.author)
+
     # TODO: Related tests for KML, GML, and distance lookups.
 
 def suite():