diff -r b758351d191f -r cc9b7e14412b web/lib/django/contrib/gis/tests/distapp/models.py
--- a/web/lib/django/contrib/gis/tests/distapp/models.py	Wed May 19 17:43:59 2010 +0200
+++ b/web/lib/django/contrib/gis/tests/distapp/models.py	Tue May 25 02:43:45 2010 +0200
@@ -26,11 +26,12 @@
     name = models.CharField(max_length=5)
     poly = models.PolygonField(srid=4269)
     objects = models.GeoManager()
+    def __unicode__(self): return self.name
 
 class SouthTexasZipcode(models.Model):
     "Model for a few South Texas ZIP codes."
     name = models.CharField(max_length=5)
-    poly = models.PolygonField(srid=32140)
+    poly = models.PolygonField(srid=32140, null=True)
     objects = models.GeoManager()
     def __unicode__(self): return self.name