0005-identifier-between-modules.md

5. Identifier between modules.

Date: 2020-04-28

Status

Accepted

Context

During communications between bounded contexts, global identifiers for entities are needed. Also, these identifiers are needed for possible future integrations with external systems.

Decision

Natural keys or uuids should be used. Primary keys are forbidden for communications between modules or with external systems. If entity has good natural key - it's the most preferable choice for identifier between modules.

Useful links:

• https://tomharrisonjr.com/uuid-or-guid-as-primary-keys-be-careful-7b2aa3dcb439