def get_by_date_and_publication(self, y, m, d, pub):
date = parse_ymd(y, m, d)
if not date:
raise PDFIssue.DoesNotExist
if isinstance(pub, basestring):
return self.get(date__exact=date, publication__slug=pub)
else:
return self.get(date__exact=date, publication=pub)
def get_by_date(self, y, m, d):
date = parse_ymd(y, m, d)
if not date:
raise Issue.DoesNotExist
issue = self.get(date__exact=date, site=Site.objects.get_current(),
**filter_live())
dummy = issue.previous; dummy = issue.next
return issue
