def render(self, context):
from django.core.urlresolvers import reverse, NoReverseMatch
args = [arg.resolve(context) for arg in self.args]
kwargs = {
smart_text(k, 'ascii'): v.resolve(context)
for k, v in self.kwargs.items()
}
view_name = self.view_name.resolve(context)
try:
current_app = context.request.current_app
except AttributeError:
# Leave only the else block when the deprecation path for
# Context.current_app completes in Django 1.10.
# Can also remove the Context.is_current_app_set property.
if context.is_current_app_set:
current_app = context.current_app
else:
try:
current_app = context.request.resolver_match.namespace
except AttributeError:
current_app = None
# Try to look up the URL twice: once given the view name, and again
# relative to what we guess is the "main" app. If they both fail,
# re-raise the NoReverseMatch unless we're using the
# {% url ... as var %} construct in which case return nothing.
url = ''
try:
url = reverse(view_name, args=args, kwargs=kwargs, current_app=current_app)
except NoReverseMatch:
exc_info = sys.exc_info()
if settings.SETTINGS_MODULE:
project_name = settings.SETTINGS_MODULE.split('.')[0]
try:
url = reverse(project_name + '.' + view_name,
args=args, kwargs=kwargs,
current_app=current_app)
except NoReverseMatch:
if self.asvar is None:
# Re-raise the original exception, not the one with
# the path relative to the project. This makes a
# better error message.
six.reraise(*exc_info)
else:
if self.asvar is None:
raise
if self.asvar:
context[self.asvar] = url
return ''
else:
if context.autoescape:
url = conditional_escape(url)
return url
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