1 files changed, 14 insertions, 0 deletions
diff --git a/saleor/core/templatetags/shop.py b/saleor/core/templatetags/shop.py
index f5318703..598baa6e 100644
--- a/saleor/core/templatetags/shop.py
+++ b/saleor/core/templatetags/shop.py
@@ -1,9 +1,12 @@
+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()
 
@@ -13,3 +16,14 @@ 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))