> As I observed, when `unique=true` the index is automatically converted to unique constraint at higher level (not sure if it's by ORM). Thus, if a single column is requested, a regular constraint will be applied, otherwise ignored.

OK, I didn't get it from the previous comment

Let's keep this issue only about indexes and create a new one for the composite constraints. But I would create the new issue after having checked that Neo4j supports them (show me succesful a test case).