From 780eef8627babee9a858d0f0f71408ff78a175c7 Mon Sep 17 00:00:00 2001
From: Radek Czajka <radoslaw.czajka@nowoczesnapolska.org.pl>
Date: Fri, 2 Mar 2012 13:39:07 +0100
Subject: [PATCH 1/1] html preview fix

---
 apps/catalogue/views.py | 5 +++--
 1 file changed, 3 insertions(+), 2 deletions(-)

diff --git a/apps/catalogue/views.py b/apps/catalogue/views.py
index d234ab0c..2ee94aea 100644
--- a/apps/catalogue/views.py
+++ b/apps/catalogue/views.py
@@ -224,8 +224,9 @@ def book_html(request, slug):
     if not book.accessible(request):
         return HttpResponseForbidden("Not authorized.")
 
-    doc = book.wldocument()
-    html = doc.as_html(parse_dublincore=False, flags=['full-page']).get_string()
+    doc = book.wldocument(parse_dublincore=False)
+    html = doc.as_html(flags=['full-page'])
+    html = html.get_string() if html is not None else ''
     response = http.HttpResponse(html, content_type='text/html', mimetype='text/html')
     return response
 
-- 
2.20.1