def related_attrs_scan_count(request, cls, attr_names):
"""
Renders a view that displays the scan counts for the combinations of
attributes specified via ``attr_names``.
That is, all existing values of all ``attr_names`` are extracted from
the objects of ``cls``.
For all possible combinations of those values (think n-dimensional
matrix), the number of existing scans with that particular combination
of values is counted.
Currently, ``attr_names`` can only contain one or two attribute names:
For one attribute name, the scan counts are displayed relatively
(pie chart) and absolutely (bar chart).
For two attribute names, the scan counts are displayed in a
table/heatmap.
"""
datetime_range_form, queryset = _get_form_and_queryset(request, cls)
attr_verbose_names = [
get_friendly_name_for_attr(cls, n)
for n in attr_names
]
attrs_scan_count = cls.get_related_attrs_scan_count(attr_names,
queryset=queryset)
attrs_count = len(attr_names)
if attrs_count == 1:
attrs_scan_count = OrderedDict(
sorted(
attrs_scan_count.iteritems(),
key=lambda t: t[1],
reverse=True
)
)
template = 'scan_count_1_attr.html'
elif attrs_count == 2:
template = 'scan_count_2_attrs.html'
else:
raise NotImplementedError("View can only handle one or two attributes.")
context = {
"cls_name": cls._meta.verbose_name_plural,
"attr_names": attr_verbose_names,
"attrs_scan_count": attrs_scan_count,
"datetime_range_form": datetime_range_form,
}
return render(request, template, context)
def related_attr_scan_intervals(request, cls, attr_name):
"""
View renders a line chart that displays the scan interval for objects
of ``cls``.
The scan intervals are grouped by all possible
values of ``attr_name`` (i.e. made to "data series").
See ``related_attrs_scan_count`` for details about the grouping.
"""
datetime_range_form, queryset = _get_form_and_queryset(request, cls)
context = {
"cls_name": cls._meta.verbose_name_plural,
"attr_name": get_friendly_name_for_attr(cls, attr_name),
"series": cls.get_related_attr_scan_intervals(attr_name, queryset=queryset),
"datetime_range_form": datetime_range_form,
}
return render(request, "scan_intervals.html", context)
