def render(self, context):
key = self.queryset_var.var
value = self.queryset_var.resolve(context)
order_by = context['request'].field
if len(order_by) > 1:
try:
try:
field_name = order_by
if order_by[0] == '-':
field_name = order_by[1:]
# check for order field exist in model
value.model._meta.get_field(field_name)
context[key] = value.order_by(order_by)
except FieldDoesNotExist as e:
if settings.DEBUG == True:
raise e
except template.TemplateSyntaxError:
if INVALID_FIELD_RAISES_404:
raise Http404('Invalid field sorting. If DEBUG were set to ' +
'False, an HTTP 404 page would have been shown instead.')
context[key] = value
else:
context[key] = value
return ''
