diesel is an in-development ORM (Object-Relational Mapper) for Rust. It aims to be a safe and efficient layer between your business logic and the database. In the words of its authors:

Diesel gets rid of the boilerplate for database interaction and eliminates runtime errors, without sacrificing performance. It takes full advantage of Rust's type system to create a low overhead query builder that "feels like Rust".

The primary author of diesel - Sean Griffin - is also a Ruby on Rails committer and maintainer of Active Record, the ORM used in Rails. So when I saw his name in relation to a Rust ORM, I knew I have to check it out. Sean also gave a great talk at PolyConf 16 about ownership semantics (not only in Rust) - Owning Ownership.

Important note: this article is outdated! Go to http://zsiciarz.github.io/24daysofrust/ for a recent version of all of 24 days of Rust articles. The blogpost here is kept as it is for historical reasons.

Yes, I'm biased. PostgreSQL is my favorite SQL database and the upcoming 9.4 release makes me even more excited. There is already a pure Rust driver for PostgreSQL - the postgres crate which will be the subject of today's article.