How to ensure Graph relation is UNIQUE?

[shiyewuxian]

When I was trying to build Graph relations, I found even if there's already a relation (person:a->likes->person:b) in SurrealDB, if I run the same:
RELATE person:a->likes->person:b, the likes table will create another in: person:a and out: person:b once again.
The only difference is using different ID.

However, for many cases, we would like to keep the entities UNIQUE, otherwise it's will be hard to get clear relations.

My question is: is there a simple way to realise the UNIQUE?

[shiyewuxian]

Ah, I found another similar one discussion: https://github.com/orgs/surrealdb/discussions/1425

@tobiemh May I have your advice when this function will be issued?

Thanks.

[ActuallyHappening]

https://surrealdb.com/docs/surrealdb/reference-guide/graph_relations#create-a-unique-index-if-the-graph-relation-is-between-equals
read the docs