def delete_not_possible_reasons(self):
"""A list of reasons why the context cannot be deleted.
An empty list means that there are no reasons, so the delete
can go ahead.
"""
reasons = []
celebrities = getUtility(ILaunchpadCelebrities)
# We go through all of the conditions why the bug tracker
# can't be deleted, and record reasons for all of them. We do
# this so that users can discover the logic behind the
# decision, and try something else, seek help, or give up as
# appropriate. Just showing the first problem would stop users
# from being able to help themselves.
# Check that no products or projects use this bugtracker.
pillars = (
getUtility(IBugTrackerSet).getPillarsForBugtrackers(
[self.context]).get(self.context, []))
if len(pillars) > 0:
reasons.append(
'This is the bug tracker for %s.' % english_list(
sorted(pillar.title for pillar in pillars)))
# Only admins and registry experts can delete bug watches en
# masse.
if not self.context.watches.is_empty():
admin_teams = [celebrities.admin, celebrities.registry_experts]
for team in admin_teams:
if self.user.inTeam(team):
break
else:
reasons.append(
'There are linked bug watches and only members of %s '
'can delete them en masse.' % english_list(
sorted(team.title for team in admin_teams)))
# Bugtrackers with imported messages cannot be deleted.
if not self.context.imported_bug_messages.is_empty():
reasons.append(
'Bug comments have been imported via this bug tracker.')
# If the bugtracker is a celebrity then we protect it from
# deletion.
celebrities_set = set(
getattr(celebrities, name)
for name in ILaunchpadCelebrities.names())
if self.context in celebrities_set:
reasons.append(
'This bug tracker is protected from deletion.')
return reasons
def _get_person_celebrities(self, is_team):
for name in ILaunchpadCelebrities.names():
attr = getattr(self.celebs, name)
if IPerson.providedBy(attr) and attr.is_team == is_team:
yield (name, attr)