"More data" schema error

Moved from GitHub tutorial/170

Posted by masonlr:

When following the More Data section of the tour, the schema definition from tutorial/1.txt at b9f10c9520097894a16431b8aa6df5d8dcf3d238 · dgraph-io/tutorial · GitHub raises an error:

Could not alter schema: Schema does not contain a matching predicate for field actor.film in type Person

Suggest adding the following (or similar) to the schema:

actor.film: [uid] @reverse .

For reference, the schema at Dgraph Ratel Dashboard has

<actor.film>: [uid] @count .