use some transactions

pandora/item/models.py

@@ -13,7 +13,7 @@ import uuid
 import unicodedata
 from urllib import quote
 
-from django.db import models
+from django.db import models, transaction
 from django.db.models import Count, Q, Sum
 from django.core.files.base import ContentFile
 from django.conf import settings
@@ -518,6 +518,7 @@ class Item(models.Model):
             else:
                 ItemFind.objects.filter(item=self, key=key).delete()
 
+        with transaction.commit_on_success():
             for key in settings.CONFIG['itemKeys']:
                 i = key['id']
                 if i == 'title':
@@ -1043,6 +1044,7 @@ class Item(models.Model):
         return icon
 
     def load_subtitles(self):
+        with transaction.commit_on_success():
             layer = Layer.objects.get(name='subtitles')
             Annotation.objects.filter(layer=layer,item=self).delete()
             offset = 0