new covers

[redakcja.git] / src / documents / models / image.py

diff --git a/src/documents/models/image.py b/src/documents/models/image.py
index 10782dc..b05c928 100644 (file)
--- a/src/documents/models/image.py
+++ b/src/documents/models/image.py
@@ -23,9 +23,9 @@ class Image(dvcs_models.Document):
     project = models.ForeignKey(Project, models.SET_NULL, null=True, blank=True)
 
     # cache
-    _new_publishable = models.NullBooleanField(editable=False)
-    _published = models.NullBooleanField(editable=False)
-    _changed = models.NullBooleanField(editable=False)
+    _new_publishable = models.BooleanField(editable=False, null=True)
+    _published = models.BooleanField(editable=False, null=True)
+    _changed = models.BooleanField(editable=False, null=True)
 
     class Meta:
         app_label = 'documents'