Hi HackerNewsers

I've worked through the tutorial on the Django website and I'm looking for something more of an intermediate level. I'm a confident developer, and use rails and asp.net mvc regularly so I'm really looking for something a bit more challenging that the simplest "get started" tutorial. I'm thinking something along the lines of Rails in Action complexity - you know a backend with some actual complex relationships and permissions.

Is there anything like that out there in the Django space?

I know "go build something of your own" is a common answer to this, but really, I would prefer, for various reasons, to play around with a tutorial in this instance.

Thanks