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Tolerate sites where all pages are private (#3974)

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When all pages on a site is private, the last_mods set will be empty
causing a crash when trying to get the max value from it.
This fix adds a test that the set is truthy (not empty) before calling
max.
This commit is contained in:
Stein Strindhaug 2017-10-26 12:53:05 +02:00 committed by Matt Westcott
parent 8d421fd84f
commit f65d961ae0
1 changed files with 2 additions and 1 deletions
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3
wagtail/contrib/wagtailsitemaps/sitemap_generator.py
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@ -35,6 +35,7 @@ class Sitemap(DjangoSitemap):
urls.append(url_info)
last_mods.add(url_info.get('lastmod'))
if None not in last_mods:
# last_mods might be empty if the whole site is private
if last_mods and None not in last_mods:
self.latest_lastmod = max(last_mods)
return urls