fix for wiki pages that don't have any history

ForgeWiki/forgewiki/tests/functional/test_root.py

@@ -21,6 +21,8 @@
 import json
 
 import PIL
+
+from forgewiki.model import Page
 from ming.odm.odmsession import ThreadLocalODMSession
 from mock import patch
 from tg import config
@@ -262,6 +264,20 @@ def test_page_history(self):
         response.mustcontain('text1')
         response.mustcontain(no='text2')
 
+    def test_page_history_missing(self):
+        self.app.get(h.urlquote('/wiki/tést/'))
+        self.app.post(
+            h.urlquote('/wiki/tést/update'),
+            params={
+                'title': 'tést'.encode(),
+                'text': 'text1',
+                'labels': '',
+            })
+        for snapshot in Page.query.get(title='tést').history():
+            snapshot.delete()
+        r = self.app.get(h.urlquote('/wiki/tést/'))
+        r.mustcontain(no='There is a newer version')
+
     def test_page_diff(self):
         self.app.post(
             h.urlquote('/wiki/tést/update'),

ForgeWiki/forgewiki/wiki_main.py

@@ -617,7 +617,7 @@ def index(self, version=None, page=0, limit=None, **kw):
         hide_left_bar = not (c.app.show_left_bar)
         subscribed_to_page = M.Mailbox.subscribed(artifact=self.page)
         latest_version = self.page.history().limit(1).first()
-        is_latest_version = cur == latest_version.version
+        is_latest_version = not latest_version or cur == latest_version.version
         return dict(
             page=page,
             cur=cur, prev=prev, next=next,