Fixed #6445 -- Allow model instances to be used as a default for ForeignKeys

(via a callable). Also updates the documentation of the "default" attribute to
indicate a callable can be used. Thanks, Philipe Raoult.


git-svn-id: http://code.djangoproject.com/svn/django/trunk@7331 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/regressiontests/model_fields/models.py

@@ -0,0 +1,24 @@
+
+from django.db import models
+
+class Foo(models.Model):
+    a = models.CharField(max_length=10)
+
+def get_foo():
+    return Foo.objects.get(id=1)
+
+class Bar(models.Model):
+    b = models.CharField(max_length=10)
+    a = models.ForeignKey(Foo, default=get_foo)
+
+__test__ = {'API_TESTS':"""
+# Create a couple of Places.
+>>> f = Foo.objects.create(a='abc')
+>>> f.id
+1
+>>> b = Bar(b = "bcd")
+>>> b.a
+<Foo: Foo object>
+>>> b.save()
+
+"""}