gergelypolonkai-web-django/gergelypolonkai_django/taghelper.py

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from django.db.models import Count
from taggit.models import Tag
from math import floor
from operator import itemgetter
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def tagcloud(request):
tagcloudlist = Tag.objects.annotate(ct=Count('taggit_taggeditem_items')).order_by('-ct')
if (len(tagcloudlist) > 0):
tmax = tagcloudlist[0].ct
tmin = 1
if (tmax == tmin):
tmax += 1
tagcloud = []
for cloudelement in tagcloudlist:
tagcount = cloudelement.ct
if (tagcount >= tmin):
size = int(floor((5.0 * (tagcount - tmin)) / (tmax - tmin)))
tagcloud.append({'name': cloudelement.name, 'slug': cloudelement.slug, 'size': size})
tagcloud.sort(key=itemgetter('name'))
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return {'tagcloud': tagcloud}