Search in statistics gives stacktrace

[Christian Strand Young]

Did a search for CPU, last month with 9 rows.
The search gave the traceback below.
Seems like one or more of the metrics that were being looked up is None.

AttributeError: 'NoneType' object has no attribute 'sysname'
Traceback (most recent call last):
File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 111, in get_response response = callback(request, *callback_args, **callback_kwargs)
File "/usr/lib/python2.7/dist-packages/nav/web/sortedstats/views.py", line 37, in index result.collect()
File "/usr/lib/python2.7/dist-packages/nav/web/sortedstats/statmodules.py", line 62, in collect self.graph_url = self.get_graph_url()
File "/usr/lib/python2.7/dist-packages/nav/web/sortedstats/statmodules.py", line 99, in get_graph_url for x in metrics]
File "/usr/lib/python2.7/dist-packages/nav/web/sortedstats/statmodules.py", line 223, in get_metric_name return self.metric_lookups[metric].sysname
AttributeError: 'NoneType' object has no attribute 'sysname

[John-Magne Bredal (john-m-bredal)]

Graphite has no idea that the metrics it gathers are related to an Interface or Netbox in NAV. Thus we are dependent on reversing a metric to an object to display information about the metric/object in the user interface. This reversion does not work 100% of the time, and when it does not Ranked Statistics crashes.

[John-Magne Bredal (john-m-bredal)]

Fix here: https://nav.uninett.no/hg/stable/rev/fd6ec6076555