check for existing item with that oxdbId

pandora/item/models.py

@@ -170,6 +170,10 @@ def get_item(info):
                 for key in ('episode_title', 'series_title', 'season', 'episode'):
                     if key in info and info[key]:
                         item.data[key] = info[key]
+                try:
+                    existing_item = Item.objects.get(oxdbId=item.oxdb_id())
+                    item = existing_item
+                except Item.DoesNotExist:
                     item.save()
     return item
 
@@ -287,7 +291,6 @@ class Item(models.Model):
 
     def save(self, *args, **kwargs):
         self.json = self.get_json()
-        if not self.oxdbId:
         self.oxdbId = self.oxdb_id()
 
         if self.poster: