Tips, lessons learned, and news from the REVSYS team on Django, Python, PostgreSQL, and operations.
Python 3.7 introduced dataclasses, which design is based on the "attrs" library. This article will show the way I use dataclasses and attrs, why I think you should use both, and why I think attrs is still very relevant.
A very common pattern in a Django Project is to have some kind of 'model-type' relationship, where you have some kind of object that can only belong to one of the types defined in the database.
It is often necessary to differentiate between an argument that has not been provided, and an argument provided with the value `None`. For that purpose, we create what's called a 'sentinel value'.
More and more often, we see schema designs that use UUIDs as primary keys. That's a valid choice if you're concerned about sharding and partitioning your database, but it has its own drawbacks, sometimes in unexpected places.
With companies moving to microservices, it's becoming common to have a system scattered across multiple repositories. It's frequent to abstract common patterns and code into private repositories that are then included in each service. But using packages from private repos with Python can be tricky. This guide will guide you through the necessary steps.
Have a URL but can't figure out what view it is supposed to use? Use resolve() to easily and quickly determine it just as Django does.
