mongoengine with django-1.8 not working properly

I Don't recommend upgrading to django 1.7 if you are using mongoengine, it gives errors like "indices must be int"

Once I downgraded django to 1.7 every works fine

In 1.8 they also moved from django.core.context_processors to django.template.context_processors

as they mentioned in https://docs.djangoproject.com/en/dev/ref/settings/#std%3asetting-TEMPLATE_CONTEXT_PROCESSORS