MariaDB fix thanks to Google gemini

parsers/survex.py

@@ -11,6 +11,7 @@ from datetime import date, datetime, timezone
 from pathlib import Path
 
 from django.core.exceptions import ValidationError
+from django.db import connection
 
 import troggle.settings as settings
 from troggle.core.models.caves import Cave, Entrance, GetCaveLookup
@@ -731,8 +732,7 @@ class LoadingSurvex:
                     print(message, file=sys.stderr)
                     stash_data_issue(
                         parser="survex",
-                        message=message,
-                        url=None, 
+                        message=message
                     )  
             qms = []
             for blk in self._pending_qm_saves:
@@ -743,11 +743,18 @@ class LoadingSurvex:
                 except Exception as e:
                     pass
                     raise
+                    
+            bulk_kwargs = {
+                "update_conflicts": True,
+                "update_fields": ['block', 'cave', 'blockname', 'grade', 'number', 'expoyear'],
+            }
+
+            # MariaDB/MySQL do not support (and don't need) unique_fields here
+            if connection.vendor != 'mysql': 
+                bulk_kwargs["unique_fields"] = ['cave', 'blockname', 'grade', 'number', 'expoyear']
+
             try:
-                QM.objects.bulk_create(qms, 
-                    update_conflicts=True,
-                    unique_fields=['cave', 'blockname', 'grade', 'number', 'expoyear'],
-                    update_fields=['block', 'cave', 'blockname', 'grade', 'number', 'expoyear'] )
+                QM.objects.bulk_create(qms, **bulk_kwargs)                    
             except Exception as e:
                 pass
                 raise