I am new to Neo4J and the @neo4j/graphql library, hoping to use this stack to create an api for a simple app. I have a bunch of questions but I will start with this one.

I have the following schema.

type Process {
  id: ID! @id
  name: String! @unique
  assets: [Asset!]! @relationship(type: "PROCESS_ASSET", direction: OUT)
}

type Asset {
  id: ID! @id
  name: String! @unique
  childAssets: [Asset!]! @relationship(type: "CHILD_ASSET", direction: OUT)
}

Which is intended to generate the following graph.

Is it possible to add a constraint that would disallow adding an asset as a child to another asset which would create a circular reference.

i.e. this should be possible

... but this should not

The reason for this is that I want to be able to calculate a score for an asset which sums properties from all child assets.

If this is not possible with neo4j constraints, a recomendation for how to handle this in the application layer (resolver of @neo4j/graphql would be great).