Actual helpful comments

SACGF · Aug 28, 2024 · d83a00b · d83a00b
1 parent fd6e856
commit d83a00b
Showing 1 changed file with 8 additions and 2 deletions.
diff --git a/genes/models.py b/genes/models.py
@@ -170,10 +170,16 @@ def __str__(self):
 
 class GeneSymbol(models.Model, PreviewModelMixin):
     """
-        If you need to perform a 'like' query on this field, you need to:
+        If you want to do a like on symbol and get an error:
 
+            GeneSymbol.objects.filter(symbol__startswith='GATA')
+            django.db.utils.NotSupportedError: nondeterministic collations are not supported for operator class "text_pattern_ops"
+
+        Instead you need to do:
+
+        GeneSymbol.get_deterministic_queryset().filter(symbol_deterministic__startswith='GATA')
     """
-    symbol = TextField(primary_key=True, db_collation='case_insensitive')
+    symbol = TextField(primary_key=True, db_collation='case_insensitive')  # See note above if 'like' breaks
 
     objects = ObjectManagerCachingRequest()