Set span=0 cause ZeroDivisionError in graphite/render

[LanselotOz]

Original Exception is

Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/django/core/handlers/base.py", line 109, in get_response
    response = callback(request, *callback_args, **callback_kwargs)
  File "/opt/graphite/webapp/graphite/render/views.py", line 140, in renderView
    valuesPerPoint = math.ceil(float(numberOfDataPoints) / float(maxDataPoints))
ZeroDivisionError: float division by zero

If we set span = 0 on graph it is the same like span = 12, but maxDataPoints which generated from graph width became zero. So request to graphite-web end with &maxDataPoints=0, which cause this exception.

[torkelo]

Seems to be fixed already. But added a further fix (makes sure missing or zero span is converted into 12). Removed 0 option from row editor.

Why did you set the span to zero?

[LanselotOz]

It wasn't me)
My colleague told me that his graph don't work. I've found, that problem was there and ask them the same question: why did you do this?
He told: if value not set - default should be used.
Maybe there is some reason for that, but graphite should have fix for this situation too i suppose.