Prisma

Hi guys, I had a few queries. How can one model something like this:
```
type User {
  friends: [User!]! @relation(name: "UserFriends")
```
graphcool console gives an error `A relation directive with a name must appear exactly 2 times.`

And the other query is related to this schema:
```
type Photo {
  file: File @relation(name: "PhotoToFile")
}

type Song {
  file: File @relation(name: "SongToFile")
}

type File {
  contentType: String! @relation(name: "SongToFile")/@relation(name: "PhotoToFile")
}
```
Now that File is a generated type, and if I were to link these relations to File's `contentType` field, is it possible to specify multiple relations on the same field?