Facets and Aggregation, and @count Option? How to.

[MichelDiz]

https://tour.dgraph.io/intro/3/
Facets and Aggregation https://docs.dgraph.io/query-language/#facets-and-aggregation
mutation {

  schema {
    name: string @index(exact, term) .
    age: int @index(int) .
    friend: uid @count .
    Reputation: int @index(int)
  }

If I need to count how many partners, children, parents or friends How to proceed?
Using the Dgraph feature of counting.
Cheers

[MichelDiz]

I noticed that DgraphQL does automatic indexing. And I figured out how to make friends. But the counting feature would be great.

friend: [Person] @reverse(name: "Person")