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-rw-r--r--core/views_caves.py2
1 files changed, 2 insertions, 0 deletions
diff --git a/core/views_caves.py b/core/views_caves.py
index dfcbf39..96efe9e 100644
--- a/core/views_caves.py
+++ b/core/views_caves.py
@@ -78,6 +78,8 @@ def caveKey(x):
Note that cave kataster numbers are not generally integers.
This needs to be fixed make a decent sort order.
"""
+ if not x.kataster_number:
+ return "~"
return x.kataster_number
def getnotablecaves():