Properly check for discriminator field in context

persist_insertone.go

@@ -49,7 +49,11 @@ func BuildInsertOne(col map[string]any, report *InitReport) {
 		if isSystem {
 			db = sysDb
 		} else {
-			account := ctx.Value("account").(string)
+			accountAny := ctx.Value("account")
+			if accountAny == nil {
+				return nil, fmt.Errorf("account required for %s", name)
+			}
+			account := accountAny.(string)
 			if account != "" {
 				db = mc.GetName(account)
 			}