Beefed up support for "lazy" related objects. Now, in addition to ForeignKey("Model") you can also say ForeignKey("app.Model"). This means that cross-app recursive relations now work.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@7158 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/mutually_referential/models.py

@@ -1,18 +1,22 @@
 """
 24. Mutually referential many-to-one relationships
 
-To define a many-to-one relationship, use ``ForeignKey()`` .
+Strings can be used instead of model literals to set up "lazy" relations.
 """
 
 from django.db.models import *
 
 class Parent(Model):
     name = CharField(max_length=100, core=True)
+    
+    # Use a simple string for forward declarations.
     bestchild = ForeignKey("Child", null=True, related_name="favoured_by")
 
 class Child(Model):
     name = CharField(max_length=100)
-    parent = ForeignKey(Parent)
+    
+    # You can also explicitally specify the related app.
+    parent = ForeignKey("mutually_referential.Parent")
 
 __test__ = {'API_TESTS':"""
 # Create a Parent