X-Git-Url: https://git.mdrn.pl/redakcja.git/blobdiff_plain/9ff5f2ac22360b1ff3ef2473c15d4acfd1e7769b..refs/heads/master:/src/documents/models/chunk.py

diff --git a/src/documents/models/chunk.py b/src/documents/models/chunk.py
index 2698b58f..797fc174 100644
--- a/src/documents/models/chunk.py
+++ b/src/documents/models/chunk.py
@@ -6,7 +6,7 @@ from django.db import models
 from django.db.utils import IntegrityError
 from django.template.loader import render_to_string
 from django.urls import reverse
-from django.utils.translation import ugettext_lazy as _
+from django.utils.translation import gettext_lazy as _
 from documents.helpers import cached_in_field
 from documents.managers import VisibleManager
 from dvcs import models as dvcs_models
@@ -75,8 +75,10 @@ class Chunk(dvcs_models.Document):
 
     def split(self, slug, title='', **kwargs):
         """ Create an empty chunk after this one """
-        self.book.chunk_set.filter(number__gt=self.number).update(
-                number=models.F('number')+1)
+        # Single update makes unique constr choke on postgres.
+        for chunk in self.book.chunk_set.filter(number__gt=self.number).order_by('-number'):
+            chunk.number += 1
+            chunk.save()
         new_chunk = None
         while not new_chunk:
             new_slug = self.book.make_chunk_slug(slug)