Implementing Model.get_again, which fetches a fresh copy from the DB.

django/db/models/base.py

@@ -1333,6 +1333,9 @@ def _check_ordering(cls):
                 )
         return errors
 
+    def get_again(self):
+        return self.__class__.objects.get(pk=self.pk)
+
 
 ############################################
 # HELPER FUNCTIONS (CURRIED MODEL METHODS) #

docs/ref/models/instances.txt

@@ -535,6 +535,19 @@ in Python`_).
 
 .. _is forbidden in Python: http://docs.python.org/reference/datamodel.html#object.__hash__
 
+``get_again``
+--------------------
+
+.. method:: Model.get_again()
+
+The ``get_again()`` method returns a copy of the current model, using
+the latest values from the database.
+
+.. note::
+   ``get_again`` uses the ``.pk`` attribute to identify models. Explicitly
+   setting this attribute will prevent ``.get_again()`` returning the original
+   database row.
+
 ``get_absolute_url``
 --------------------
 

tests/model_get_again/__init__.py

@@ -0,0 +1 @@
+

tests/model_get_again/models.py

@@ -0,0 +1,5 @@
+from django.db import models
+
+
+class Person(models.Model):
+    name = models.CharField(max_length=50)

tests/model_get_again/tests.py

@@ -0,0 +1,13 @@
+from django.test import TestCase
+
+from .models import Person
+
+
+class GetAgainTests(TestCase):
+    def test_get_again(self):
+        p = Person.objects.create(name="foo")
+
+        Person.objects.update(name="bar")
+
+        p = p.get_again()
+        self.assertEqual(p.name, "bar")