Domain-Driven Design in Python
I'm thrilled to announce the release of lato, a microframework designed to empower developers in building modular applications with Python. Born out of the necessity to streamline development within the realm of Domain-Driven Design, lato has evolved...
Key concepts and implementation
In the previous post, we implemented a really simple file-based repository that used the pickle module. As we didn't use a database, we didn't have to deal with creating tables and columns, and all the domain models were directly serialized from a me...
Repository pattern - why do we need it? The main goal of the repository pattern is to abstract the logic used for retrieving (loading) and persisting (saving) entities in external storage. The interface of a repository usually resembles the ones used...
In the previous post, we discussed the implementation of Value Objects. This time let's focus on a different kind of Domain Objects - Entities. The distinction is pretty intuitive: Entities are usually big things like Customer, Ship, Rental Agreemen...
A Value Object is one of the fundamental building blocks of Domain-Driven Design. It is a small object (in terms of memory), which consists of one or more attributes, and which represents a conceptual whole. Value Object is usually a part of Entity. ...
In Domain-Driven Design we have a clear separation between the Domain, Application, and Infrastructure. If we are talking about the business rules, then then the most obvious choice is the Domain layer, but sometimes it could be OK to place the logic...
Some time ago I stumbled across an interesting problem. In a Python web app, I wanted to add a correlation_id to each log produced by the request handler. This would allow me to easily capture all the logs that happen within a request, even if reques...
Motivation When I decided I want to learn DDD, I needed a sample project to work on. I know that there are plenty of great DDD implementation examples available (i.e. [https://github.com/ddd-by-examples/library], [https://github.com/kgrzybek/modular-...