Fix pages search

arkindex/documents/search.py

@@ -81,7 +81,7 @@ def search_nested_post(model, data):
 
     elts_date_range = {
         uuid.UUID(result['_id']): result['_source']['date_range'][0]
-        if result['_source']['date_range'] else {}
+        if result['_source'].get('date_range') else {}
         for result in results
     }