Use python_2_unicode_compatible decorator on models.

provider/oauth2/models.py

@@ -7,6 +7,7 @@
 from django.conf import settings
 from django.db import models
 from django.utils import timezone
+from django.utils.encoding import python_2_unicode_compatible
 
 from provider import constants
 from provider.constants import CLIENT_TYPES
@@ -17,6 +18,7 @@
 AUTH_USER_MODEL = settings.AUTH_USER_MODEL
 
 
+@python_2_unicode_compatible
 class Client(models.Model):
     """
     Default client implementation.
@@ -49,7 +51,7 @@ class Meta:
     client_type = models.IntegerField(choices=CLIENT_TYPES)
     logout_uri = models.URLField(help_text="Your application's logout URL", null=True, blank=True)
 
-    def __unicode__(self):
+    def __str__(self):
         return self.redirect_uri
 
     def get_default_token_expiry(self):
@@ -87,6 +89,7 @@ def deserialize(cls, data):
         return cls(**kwargs)
 
 
+@python_2_unicode_compatible
 class Grant(models.Model):
     """
     Default grant implementation. A grant is a code that can be swapped for an
@@ -116,10 +119,11 @@ class Meta:
     redirect_uri = models.CharField(max_length=255, blank=True)
     scope = models.IntegerField(default=0)
 
-    def __unicode__(self):
+    def __str__(self):
         return self.code
 
 
+@python_2_unicode_compatible
 class AccessToken(models.Model):
     """
     Default access token implementation. An access token is a time limited
@@ -153,7 +157,7 @@ class Meta:
 
     objects = AccessTokenManager()
 
-    def __unicode__(self):
+    def __str__(self):
         return self.token
 
     def save(self, *args, **kwargs):
@@ -181,6 +185,7 @@ def get_expire_delta(self, reference=None):
         return timedelta.days * 86400 + timedelta.seconds
 
 
+@python_2_unicode_compatible
 class RefreshToken(models.Model):
     """
     Default refresh token implementation. A refresh token can be swapped for a
@@ -205,5 +210,5 @@ class Meta:
     client = models.ForeignKey(Client)
     expired = models.BooleanField(default=False)
 
-    def __unicode__(self):
+    def __str__(self):
         return self.token