3 files changed, 62 insertions, 0 deletions
diff --git a/parts/django/tests/modeltests/save_delete_hooks/__init__.py b/parts/django/tests/modeltests/save_delete_hooks/__init__.py
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/parts/django/tests/modeltests/save_delete_hooks/__init__.py
diff --git a/parts/django/tests/modeltests/save_delete_hooks/models.py b/parts/django/tests/modeltests/save_delete_hooks/models.py
new file mode 100644
index 0000000..515c7f6
--- /dev/null
+++ b/parts/django/tests/modeltests/save_delete_hooks/models.py
@@ -0,0 +1,32 @@
+"""
+13. Adding hooks before/after saving and deleting
+
+To execute arbitrary code around ``save()`` and ``delete()``, just subclass
+the methods.
+"""
+
+from django.db import models
+
+
+class Person(models.Model):
+    first_name = models.CharField(max_length=20)
+    last_name = models.CharField(max_length=20)
+
+    def __init__(self, *args, **kwargs):
+        super(Person, self).__init__(*args, **kwargs)
+        self.data = []
+
+    def __unicode__(self):
+        return u"%s %s" % (self.first_name, self.last_name)
+
+    def save(self, *args, **kwargs):
+        self.data.append("Before save")
+         # Call the "real" save() method
+        super(Person, self).save(*args, **kwargs)
+        self.data.append("After save")
+
+    def delete(self):
+        self.data.append("Before deletion")
+        # Call the "real" delete() method
+        super(Person, self).delete()
+        self.data.append("After deletion")
diff --git a/parts/django/tests/modeltests/save_delete_hooks/tests.py b/parts/django/tests/modeltests/save_delete_hooks/tests.py
new file mode 100644
index 0000000..dc7b8ee
--- /dev/null
+++ b/parts/django/tests/modeltests/save_delete_hooks/tests.py
@@ -0,0 +1,30 @@
+from django.test import TestCase
+
+from models import Person
+
+
+class SaveDeleteHookTests(TestCase):
+    def test_basic(self):
+        p = Person(first_name="John", last_name="Smith")
+        self.assertEqual(p.data, [])
+        p.save()
+        self.assertEqual(p.data, [
+            "Before save",
+            "After save",
+        ])
+
+        self.assertQuerysetEqual(
+            Person.objects.all(), [
+                "John Smith",
+            ],
+            unicode
+        )
+
+        p.delete()
+        self.assertEqual(p.data, [
+            "Before save",
+            "After save",
+            "Before deletion",
+            "After deletion",
+        ])
+        self.assertQuerysetEqual(Person.objects.all(), [])