--- a/src/iconolab/models.py	Tue Jun 19 17:56:58 2018 +0200
+++ b/src/iconolab/models.py	Fri Jun 22 11:33:17 2018 +0200
@@ -1,16 +1,13 @@
 import json
 import logging
 import re
-import urllib
 import uuid
 
 import requests
 from django.conf import settings
 from django.contrib.auth.models import User
 from django.contrib.contenttypes.fields import GenericRelation
-from django.contrib.contenttypes.models import ContentType
-from django.db import connection, models, transaction
-from django.db.models import Count
+from django.db import models, transaction
 from django.utils.functional import cached_property
 from django.utils.text import slugify
 from django_comments_xtd.models import XtdComment
@@ -61,7 +58,7 @@
     def completed_percent(self):
 
         items_with_annotation = \
-            ImageStats.objects.filter(image__item__collection = self, annotations_count__gt=0)\
+            ImageStats.objects.filter(image__item__collection=self, annotations_count__gt=0)\
                 .values('image__item').distinct().count()
         total_items = self.items_count
 
@@ -455,7 +452,7 @@
     def latest_revision_for_user(self, user):
         user_revisions = self.revisions.filter(creator=user)
         if user_revisions.exists():
-            return user_revisions.filter(creator=author).order_by("-created").first()
+            return user_revisions.order_by("-created").first()
         return None
 
     @transaction.atomic