From abc9232016ee33a518f99dee2970ad88e46a4a8c Mon Sep 17 00:00:00 2001
From: Kovid Goyal <kovid@kovidgoyal.net>
Date: Mon, 15 Jul 2013 19:07:33 +0530
Subject: [PATCH] ...

---
 src/calibre/db/cache.py | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/calibre/db/cache.py b/src/calibre/db/cache.py
index 42e53a6f47..330e8dfba5 100644
--- a/src/calibre/db/cache.py
+++ b/src/calibre/db/cache.py
@@ -1341,6 +1341,7 @@ class Cache(object):
                     val_map[book_id] = ' & '.join(sorts)
             if val_map:
                 self._set_field('author_sort', val_map)
+        self._mark_as_dirty(changed_books)
         return changed_books
 
     @write_api
@@ -1349,6 +1350,7 @@ class Cache(object):
         changed_books = set()
         for author_id in author_id_to_link_map:
             changed_books |= self._books_for_field('authors', author_id)
+        self._mark_as_dirty(changed_books)
         return changed_books
 
     # }}}