Beyond 'wrappers' - Using querysets to compartmentalize business logic into the Django ORM
The Django ORM is an invaluable tool for querying your data. However, as a generic tool, it's often not a clean fit. Querying logic ends up being duplicated in multiple places, often with subtle variations. Maybe you have helper functions for commonly used queries, but these can't be combined.
This article describes a technique for extending Django querysets with methods specific to your models. This lets you write business logic in a way that fits in to the Django ORM, like
Some benefits of encapsulating database queries are:
- Reusability: This method can be reused elsewhere, preventing the need for duplication.
- Unification: This query presumably represents something meaningful. By creating and using an abstraction, you avoid multiple implementations of the same concept, which may have subtle differences.