gave these models `modified` rows

apps/addons/models.py

@@ -1,5 +1,3 @@
-from datetime import datetime
-
 from django.conf import settings
 from django.db import models
 
@@ -106,10 +104,9 @@ class AddonType(amo.ModelBase):
         return unicode(self.name)
 
 
-class BlacklistedGuid(models.Model):
+class BlacklistedGuid(amo.ModelBase):
 
     guid = models.CharField(max_length=255, unique=True)
-    created = models.DateTimeField(default=datetime.now, editable=False)
 
     class Meta:
         db_table = 'blacklisted_guids'

apps/approvals/models.py

@@ -2,12 +2,11 @@ from datetime import datetime
 
 from django.db import models
 
-import caching
+import amo
 
 
-class Approval(caching.CachingMixin, models.Model):
+class Approval(amo.ModelBase):
 
-    created = models.DateTimeField(default=datetime.now)
     reviewtype = models.CharField(max_length=10, default='pending')
     action = models.IntegerField(default=0)
     os = models.CharField(max_length=255, default='')
@@ -19,8 +18,5 @@ class Approval(caching.CachingMixin, models.Model):
     #file = models.ForeignKey('files.File')
     reply_to = models.ForeignKey('self', null=True, db_column='reply_to')
 
-    objects = caching.CachingManager()
-
-    class Meta:
+    class Meta(amo.ModelBase.Meta):
         db_table = 'approvals'
-        get_latest_by = 'created'