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from __future__ import unicode_literals
try:
from itertools import zip_longest
except ImportError:
from itertools import izip_longest as zip_longest
from django.template import Library
from django.utils.http import urlencode
register = Library()
@register.filter
def slice(items, group_size=1):
args = [iter(items)] * group_size
return (filter(None, group)
for group in zip_longest(*args, fillvalue=None))
@register.simple_tag(takes_context=True)
def get_sort_by_url(context, field, descending=False):
request = context['request']
request_get = request.GET.dict()
if descending:
request_get['sort_by'] = '-' + field
else:
request_get['sort_by'] = field
return '%s?%s' % (request.path, urlencode(request_get))
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