Allow for matches against unsaved objects in querysets (which will therefore

match nothing). This allows for some more straightforward code in the admin
interface.

Fixed #7488 (all the debugging there was done by Brian Rosner, who narrowed it
down to the item in this patch).


git-svn-id: http://code.djangoproject.com/svn/django/trunk@8061 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/model_inheritance_regress/models.py

@@ -43,12 +43,17 @@ class ParkingLot(Place):
     def __unicode__(self):
         return u"%s the parking lot" % self.name
 
+class Supplier(models.Model):
+    restaurant = models.ForeignKey(Restaurant)
+
 class Parent(models.Model):
     created = models.DateTimeField(default=datetime.datetime.now)
 
 class Child(Parent):
     name = models.CharField(max_length=10)
 
+
+
 __test__ = {'API_TESTS':"""
 # Regression for #7350, #7202
 # Check that when you create a Parent object with a specific reference to an
@@ -172,4 +177,9 @@ True
 >>> r.id == r.place_ptr_id
 True
 
+# Regression test for #7488. This looks a little crazy, but it's the equivalent
+# of what the admin interface has to do for the edit-inline case.
+>>> Supplier.objects.filter(restaurant=Restaurant(name='xx', address='yy'))
+[]
+
 """}