magic-removal: Moved model unit tests from 'testapp' package into 'modeltests' package, with each model test getting its own app

git-svn-id: http://code.djangoproject.com/svn/django/branches/magic-removal@1606 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/m2o_recursive2/models.py

@@ -0,0 +1,43 @@
+"""
+12. Relating a model to another model more than once
+
+In this example, a ``Person`` can have a ``mother`` and ``father`` -- both of
+which are other ``Person`` objects.
+
+Set ``related_name`` to designate what the reverse relationship is called.
+"""
+
+from django.core import meta
+
+class Person(meta.Model):
+    full_name = meta.CharField(maxlength=20)
+    mother = meta.ForeignKey('self', null=True, related_name='mothers_child')
+    father = meta.ForeignKey('self', null=True, related_name='fathers_child')
+
+    def __repr__(self):
+        return self.full_name
+
+API_TESTS = """
+# Create two Person objects -- the mom and dad in our family.
+>>> dad = Person(full_name='John Smith Senior', mother=None, father=None)
+>>> dad.save()
+>>> mom = Person(full_name='Jane Smith', mother=None, father=None)
+>>> mom.save()
+
+# Give mom and dad a kid.
+>>> kid = Person(full_name='John Smith Junior', mother=mom, father=dad)
+>>> kid.save()
+
+>>> kid.get_mother()
+Jane Smith
+>>> kid.get_father()
+John Smith Senior
+>>> dad.get_fathers_child_list()
+[John Smith Junior]
+>>> mom.get_mothers_child_list()
+[John Smith Junior]
+>>> kid.get_mothers_child_list()
+[]
+>>> kid.get_fathers_child_list()
+[]
+"""