Leyla Karzand’s Reviews > Architecture Patterns with Python: Enabling Test-Driven Development, Domain-Driven Design, and Event-Driven Microservices > Status Update

We’ve given you a whole new arsenal of ways to shoot yourself in the foot, so we should discuss some basic firearms safety.

"Hee hee hee, no foreign keys, just strings, YOLO!"

Rule of thumb: if you can’t describe ?hat your function does ?ithout using ?ords like “then” or “and,” you might be violating the SRP [Single Responsibility Principle].

"You may have come across the use of the word collaborators to describe objects that work together to achieve a goal. The unit of work and the repository are a great example of collaborators in the object-modeling sense. In responsibility-driven design, clusters of objects that collaborate in their roles are called object neighborhoods, which is, in our professional opinion, totally adorable."