Universal node (uid) in @hasInverse object in schema

Users GraphQL
6

Do you mean when querying?
With the schema as mentioned before you could do something like this:

query {
  queryVideo {
    container {
      __typename # Will tell you if the container is a Commercial or Promotion
      ... on Commercial {
        id
        name
      }
      ... on Promotion {
        id
        name
      }
    }
  }
}

Alternatively you could put the id (and name) into the interface as well, would probably fit your case better:

interface VideoContainer {
    id: ID!
    name: String!
    video: Video
}

type Commercial implements VideoContainer {
    commercialProperty: String!
}

type Promotion implements VideoContainer {
    promotionProperty: String!
}

type Video {
    id: ID!
    url: String!
    container: VideoContainer @hasInverse(field: video)
}

And query like this

query {
  queryVideo {
    id
    url
    container {
      id
      name
      __typename # Will tell you if the container is a Commercial or Promotion
      ... on Commercial {
        commercialProperty # Here you could extract Commercial only predicates
      }
      ... on Promotion {
        promotionProperty # Here you could extract Promotion only predicates
      }
    }
  }
}