Guard against use of nonexistant attribute.

levkowetz · levkowetz · commit 63f5af7e4d48 · 2016-05-05T14:09:07.000Z
- Legacy-Id: 11166
diff --git a/ietf/doc/utils.py b/ietf/doc/utils.py
@@ -597,7 +597,7 @@ def get_ancestors(doc):
             'published': e.time.isoformat(),
             'url': url
         }
-        if doc.history_set.filter(rev=e.newrevisiondocevent.rev).exists():
+        if hasattr(e, 'newrevisiondocevent') and doc.history_set.filter(rev=e.newrevisiondocevent.rev).exists():
             history[url]['pages'] = doc.history_set.filter(rev=e.newrevisiondocevent.rev).first().pages
     history = history.values()
     return sorted(history, key=lambda x: x['published'])

Original file line number	Diff line number	Diff line change
`@@ -597,7 +597,7 @@ def get_ancestors(doc):`
`597`	`597`	`'published': e.time.isoformat(),`
`598`	`598`	`'url': url`
`599`	`599`	`}`
`600`		`- if doc.history_set.filter(rev=e.newrevisiondocevent.rev).exists():`
	`600`	`+ if hasattr(e, 'newrevisiondocevent') and doc.history_set.filter(rev=e.newrevisiondocevent.rev).exists():`
`601`	`601`	`history[url]['pages'] = doc.history_set.filter(rev=e.newrevisiondocevent.rev).first().pages`
`602`	`602`	`history = history.values()`
`603`	`603`	`return sorted(history, key=lambda x: x['published'])`