base.py 文件源码

def summarize(self, start, end):
        if not api.nova.extension_supported('SimpleTenantUsage', self.request):
            return

        if start <= end and start <= self.today:
            # The API can't handle timezone aware datetime, so convert back
            # to naive UTC just for this last step.
            start = timezone.make_naive(start, timezone.utc)
            end = timezone.make_naive(end, timezone.utc)
            try:
                self.usage_list = self.get_usage_list(start, end)
            except Exception:
                exceptions.handle(self.request,
                                  _('Unable to retrieve usage information.'))
        elif end < start:
            messages.error(self.request,
                           _("Invalid time period. The end date should be "
                             "more recent than the start date."))
        elif start > self.today:
            messages.error(self.request,
                           _("Invalid time period. You are requesting "
                             "data from the future which may not exist."))

        for project_usage in self.usage_list:
            project_summary = project_usage.get_summary()
            for key, value in project_summary.items():
                self.summary.setdefault(key, 0)
                self.summary[key] += value