# encoding: utf-8
from django import template
from django.http import QueryDict
from classytags.core import Tag, Options
from classytags.arguments import MultiKeywordArgument, MultiValueArgument
register = template.Library()
class QueryParameters(Tag):
name = 'query'
options = Options(
MultiKeywordArgument('kwa'),
)
def render_tag(self, context, kwa):
q = QueryDict('').copy()
q.update(kwa)
return q.urlencode()
register.tag(QueryParameters)
class GetParameters(Tag):
"""
{% get_parameters [except_field, ] %}
"""
name = 'get_parameters'
options = Options(
MultiValueArgument('except_fields', required=False),
)
def render_tag(self, context, except_fields):
try:
# If there's an exception (500), default context_processors may not
# be called.
request = context['request']
except KeyError:
return context
getvars = request.GET.copy()
for field in except_fields:
if field in getvars:
del getvars[field]
return getvars.urlencode()
register.tag(GetParameters)
