From 761a71930b1a6a8ffc329562e46ae0cc8e78645c Mon Sep 17 00:00:00 2001
From: Philip Sargent <philip.sargent@gmail.com>
Date: Thu, 13 Jul 2023 22:20:01 +0200
Subject: [PATCH] hack to stop crash

---
 core/models/survex.py | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/core/models/survex.py b/core/models/survex.py
index f62d93b..7b69b64 100644
--- a/core/models/survex.py
+++ b/core/models/survex.py
@@ -229,7 +229,11 @@ class SurvexBlock(models.Model):
         """This is used to set different colours for the different trips on
         the calendar view of the expedition"""
         mx = 10
-        index = list(SurvexBlock.objects.filter(date=self.date)).index(self)
+        try:
+            index = list(SurvexBlock.objects.filter(date=self.date)).index(self)
+        except:
+            print(f"DayIndex: BAD BAD BAD SurvexBlock items on one day '{index}' {self}")
+            index = 0
         if index not in range(0, mx):
             print(f"DayIndex: More than {mx-1} SurvexBlock items on one day '{index}' {self}")
             index = 0