The Identity and Uniqueness says: Datomic does not provide a mechanism to declare composite uniqueness constraints; however, you can implement them (or any arbitrary functional constraint) via transaction functions. However, this seems no longer true. It probably should point to Composite Tuples .…

Stale sentence in docs regarding composite uniqueness constraints

marshall February 21, 2020, 3:11pm 2

Thanks, we’ve corrected this in the docs.

Topic		Replies	Views
Composite keys Datomic Cloud	2	1520	June 21, 2018
Upsert behavior with composite tuple key Datomic Cloud	5	4024	January 6, 2023
:db.unique/identity does not work for tuple attributes Troubleshooting	1	2234	July 16, 2019
:db.unique/identity added later not enforced? Peer API	3	1323	June 23, 2020
Conflict when transacting non-unique values for entities resolved by composite tuples Datomic Cloud	1	1133	March 17, 2020