use python_2_unicode_compatible backported from django 1.5

templatetag_sugar/tests/models.py

@@ -1,8 +1,24 @@
 from django.db import models
+import six
 
 
+def python_2_unicode_compatible(klass):
+    """
+A decorator that defines __unicode__ and __str__ methods under Python 2.
+Under Python 3 it does nothing.
+
+To support Python 2 and 3 with a single code base, define a __str__ method
+returning text and apply this decorator to the class.
+"""
+    if not six.PY3:
+        klass.__unicode__ = klass.__str__
+        klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
+    return klass
+
+
+@python_2_unicode_compatible
 class Book(models.Model):
     title = models.CharField(max_length=50)
-    
-    def __unicode__(self):
+
+    def __str__(self):
         return self.title