Merge lp:~joetalbott/qa-dashboard/eventstat_kpi_fix into lp:qa-dashboard

[Joe Talbott]

eventstat - Fix KPI page to avoid index error if no results are available.

eventstat - Fix KPI page to avoid index error if no results are available.

[PS Jenkins bot (ps-jenkins)]

PASSED: Continuous integration, rev:756
http://s-jenkins.ubuntu-ci:8080/job/dashboard-ci/351/
Executed test runs:

Click here to trigger a rebuild:
http://s-jenkins.ubuntu-ci:8080/job/dashboard-ci/351/rebuild

review: Approve (continuous-integration)

[Paul Larson (pwlars)]

Looks good

review: Approve

=== modified file 'eventstat/dashboard.py'
--- eventstat/dashboard.py	2013-10-07 02:10:15 +0000
+++ eventstat/dashboard.py	2014-07-30 03:49:22 +0000
@@ -38,11 +38,15 @@
         return self.IMPORTANCE_HIGH
 
     def _get_latest_build_number(self):
-        latest_build_number = EventstatMetric.objects.filter(
+        metrics = EventstatMetric.objects.filter(
             publish=True,
             name='total',
             image__arch__isnull=False,
-        ).order_by('-image__build_number')[0].image.build_number
+        ).order_by('-image__build_number')
+
+        latest_build_number = "None"
+        if metrics.count() > 0:
+		latest_build_number = metrics[0].image.build_number
 
         return str(latest_build_number)