+
+ try:
+ app_label, model = params[3].strip('"').split('.')
+ ct = ContentType.objects.get(app_label=app_label, model=model)
+ except ValueError:
+ raise template.TemplateSyntaxError('"%s" template tag option "with" requires an argument of the form app_label.model (see django.contrib.contenttypes)' % tag)
+ except ContentType.DoesNotExist:
+ raise template.TemplateSyntaxError('"%s" template tag option "with" requires an argument of the form app_label.model which refers to an installed content type (see django.contrib.contenttypes)' % tag)