Stats: fix parrallel update

1 files changed, 5 insertions, 4 deletions

diff --git a/archaeological_operations/models.py b/archaeological_operations/models.py
index 3538db2f8..c295e40ac 100644
--- a/archaeological_operations/models.py
+++ b/archaeological_operations/models.py
@@ -1604,12 +1604,13 @@ class Operation(ClosedItem, DocumentItem, BaseHistorizedItem, QRCodeItem,
                 finds__upstream_treatment_id__isnull=True,
                 finds__base_finds__context_record__operation=self)]
         for q in qs:
-            for res in q.values('source_type').distinct():
-                st = res['source_type']
+            for st in set(q.values_list('source_type_id',
+                                        flat=True).distinct()):
                 if st not in docs:
                     docs[st] = 0
-                docs[st] += q.filter(source_type=st).count()
-        docs = [(str(SourceType.objects.get(pk=k)), docs[k]) for k in docs]
+                docs[st] += q.filter(source_type_id=st).count()
+        docs = [(str(SourceType.objects.get(pk=k))
+                 if k else str(_("No type")), docs[k]) for k in docs]
         return list(sorted(docs, key=lambda x: x[0]))
 
     @property