From c30dfc63437a81c9fdeda27a2ad02449b3a122d3 Mon Sep 17 00:00:00 2001
From: Paul Culley <paulr2787@gmail.com>
Date: Thu, 9 Jan 2020 11:38:16 -0600
Subject: [PATCH] Fix db to warn/prevent opening newer schema versions (#945)

---
 gramps/gen/db/generic.py | 7 +++++++
 1 file changed, 7 insertions(+)

diff --git a/gramps/gen/db/generic.py b/gramps/gen/db/generic.py
index ba445c9d8..5c160ed24 100644
--- a/gramps/gen/db/generic.py
+++ b/gramps/gen/db/generic.py
@@ -47,6 +47,7 @@ from . import (DbReadBase, DbWriteBase, DbUndo, DBLOGNAME, DBUNDOFN,
                REPOSITORY_KEY, NOTE_KEY, TAG_KEY, TXNADD, TXNUPD, TXNDEL,
                KEY_TO_NAME_MAP, DBMODE_R, DBMODE_W)
 from .utils import write_lock_file, clear_lock_file
+from .exceptions import DbVersionError
 from ..errors import HandleError
 from ..utils.callback import Callback
 from ..updatecallback import UpdateCallback
@@ -659,6 +660,12 @@ class DbGeneric(DbWriteBase, DbReadBase, UpdateCallback, Callback):
 
         self.db_is_open = True
 
+        # Check on db version to see if too new
+        dbversion = int(self._get_metadata('version', default='0'))
+        if dbversion > self.VERSION[0]:
+            self.close()
+            raise DbVersionError(dbversion, 18, self.VERSION[0])
+
     def _close(self):
         """
         Close database backend.