3 files changed, 39 insertions, 0 deletions
diff --git a/parts/django/tests/modeltests/mutually_referential/__init__.py b/parts/django/tests/modeltests/mutually_referential/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/parts/django/tests/modeltests/mutually_referential/__init__.py
diff --git a/parts/django/tests/modeltests/mutually_referential/models.py b/parts/django/tests/modeltests/mutually_referential/models.py
new file mode 100644
index 0000000..db05cbc
--- /dev/null
+++ b/parts/django/tests/modeltests/mutually_referential/models.py
@@ -0,0 +1,19 @@
+"""
+24. Mutually referential many-to-one relationships
+
+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)
+
+    # Use a simple string for forward declarations.
+    bestchild = ForeignKey("Child", null=True, related_name="favoured_by")
+
+class Child(Model):
+    name = CharField(max_length=100)
+
+    # You can also explicitally specify the related app.
+    parent = ForeignKey("mutually_referential.Parent")
diff --git a/parts/django/tests/modeltests/mutually_referential/tests.py b/parts/django/tests/modeltests/mutually_referential/tests.py
new file mode 100644
index 0000000..101d67c
--- /dev/null
+++ b/parts/django/tests/modeltests/mutually_referential/tests.py
@@ -0,0 +1,20 @@
+from django.test import TestCase
+from models import Parent, Child
+
+class MutuallyReferentialTests(TestCase):
+
+    def test_mutually_referential(self):
+        # Create a Parent
+        q = Parent(name='Elizabeth')
+        q.save()
+
+        # Create some children
+        c = q.child_set.create(name='Charles')
+        e = q.child_set.create(name='Edward')
+
+        # Set the best child
+        # No assertion require here; if basic assignment and
+        # deletion works, the test passes.
+        q.bestchild = c
+        q.save()
+        q.delete()