How to create unique constraint involving multiple properties in Neo4J

Question

I know I can create a unique constraint on a single property with Cypher like CREATE CONSTRAINT ON (p:Person) ASSERT p.name IS UNIQUE. But I was wondering wheth

Answer 1

As of neo4j version 3.3 there is a constraint called NODE KEY which can be used for uniqueness across multiple properties.

From the documentation:

To create a Node Key ensuring that all nodes with a particular label have a set of defined properties whose combined value is unique, and where all properties in the set are present

Example Query

CREATE CONSTRAINT ON (n:Person) ASSERT (n.firstname, n.surname) IS NODE KEY