views.py 文件源码

def get_vlan_graph_url(vlanid, family=4, timeframe="day"):
    """Returns a Graphite graph render URL for a VLAN"""
    vlan = get_object_or_404(Vlan, pk=vlanid)
    try:
        family = int(family)
    except ValueError:
        family = 4

    extra = {'where': ['family(netaddr) = %s' % family]}
    prefixes = sorted(vlan.prefix_set.all().extra(**extra),
                      key=methodcaller('get_prefix_size'),
                      reverse=True)
    if not prefixes:
        return None

    metrics = _vlan_metrics_from_prefixes(prefixes, family)
    return get_simple_graph_url(
        metrics, "1" + timeframe,
        title="Total IPv{0} addresses on VLAN {1}".format(family, vlan),
        width=597, height=251)