MariaDB foibles, try to work around them

parsers/survex.py

@@ -12,6 +12,7 @@ from pathlib import Path
 
 from django.core.exceptions import ValidationError
 from django.db import connection
+from django.db import transaction
 
 import troggle.settings as settings
 from troggle.core.models.caves import Cave, Entrance, GetCaveLookup
@@ -2334,8 +2335,12 @@ class LoadingSurvex:
         qms_csv = QM.objects.filter(loaded_from_csv=True) # the CSV QMs
         print(f"\n  - Currently {len(qms_svx)} survex QMs and {len(qms_csv)} CSV QMs", file=sys.stderr)
    
+        # Getting round MariaDB foibles: put these in different transactions
+        with transaction.atomic():
             self.save_survexblocks_to_db()
+        with transaction.atomic():            
             self.save_personroles_to_db()
+        with transaction.atomic():            
             self.save_qms_to_db()
         qms_n = QM.objects.all().count()
         print(f"  - Now {qms_n}  QMs in total", file=sys.stderr)