── TYPE MISMATCH in example/main.roc ───────────────────────────────────────────

This expression has a type that does not implement the abilities it's expected to:

23│>      Client.buildQuery "DataQuery" \{ query, book } ->
24│>          Query.start {
25│>              books: <-
26│>                  Query.start {
27│>                      author: <- Query.field book.author,
28│>                  }
29│>                  |> Query.object query.books,
30│>          }

I can't generate an implementation of the Decoding ability for

    { books : List (Option.Option { author : Str }) }

In particular, an implementation for

    Option.Option { author : Str }

cannot be generated.

Tip: Option does not implement Decoding.