def pledge(self, geuser):
"""geuser pledges to perform this action.
Records the Pledge, posts a message to community feed, and clears relevant caches"""
_, is_created = Pledge.objects.get_or_create(action = self, user = geuser)
if is_created:
entry = Entry(who = geuser,
msg = 'pledged to <strong>%s</strong>' % self.title,
campaign = self.campaign)
entry.save()
EntryView.refresh_recent_activity(self.campaign)
Entry.objects.clear_dashboard_cache(self.campaign)
Action.objects.clear_dashboard_cache(self.campaign)