From 351f25293cf280ff6f7a4f20240444d3ce1410d4 Mon Sep 17 00:00:00 2001
From: Charles Haley <>
Date: Tue, 29 Jan 2013 07:26:38 +0100
Subject: [PATCH] In tag browser, prevent attempting to modify a pseudo-tag
 created from a composite column

---
 src/calibre/library/database2.py | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/calibre/library/database2.py b/src/calibre/library/database2.py
index 754a583f74..d6362f2a76 100644
--- a/src/calibre/library/database2.py
+++ b/src/calibre/library/database2.py
@@ -1932,7 +1932,8 @@ class LibraryDatabase2(LibraryDatabase, SchemaUpgrade, CustomColumns):
                 use_sort_as_name = True
             else:
                 use_sort_as_name = False
-            is_editable = category not in ['news', 'rating', 'languages']
+            is_editable = (category not in ['news', 'rating', 'languages'] and
+                                datatype != "composite")
             categories[category] = [tag_class(formatter(r.n), count=r.c, id=r.id,
                                         avg=avgr(r), sort=r.s, icon=icon,
                                         category=category,