Prefer references to external Aggregates only by their…
““Prefer references to external Aggregates only by their globally unique identity, not by holding a direct object reference (or “pointer”).””
About This Quote
This interpretation was drafted with AI assistance. It is one reading of the quote, not the author's own explanation.
Reference objects should be identified by unique IDs rather than direct pointers to avoid tight coupling.
In simple terms: Use IDs, not object references.
Key Takeaway
Design loosely coupled systems.
Themes
software design
domain modeling
references
decoupling
Mood
technical
practical
Type
guideline
instructional
When to use this quote
- microservices
- distributed systems
- event sourcing
Key Concepts
software architecture
data integrity
system design
Questions to Reflect On
- How will you manage ID resolution efficiently?
- What trade‑offs exist between performance and decoupling?
A Different Perspective
ID-based references can add complexity in navigation.