Isn't the problem that Option is a Product and the class it contains isn't checked? Adding support for Set fixes the example, but the problem would happen with any class there isn't an encoder for, right?
On Wed, Oct 26, 2016 at 11:18 AM, Michael Armbrust <mich...@databricks.com> wrote: > Hmm, that is unfortunate. Maybe the best solution is to add support for > sets? I don't think that would be super hard. > > On Tue, Oct 25, 2016 at 8:52 PM, Koert Kuipers <ko...@tresata.com> wrote: > >> i am trying to use encoders as a typeclass where if it fails to find an >> ExpressionEncoder it falls back to KryoEncoder. >> >> the issue seems to be that ExpressionEncoder claims a little more than it >> can handle here: >> implicit def newProductEncoder[T <: Product : TypeTag]: Encoder[T] = >> Encoders.product[T] >> >> this "claims" to handle for example Option[Set[Int]], but it really >> cannot handle Set so it leads to a runtime exception. >> >> would it be useful to make this a little more specific? i guess the >> challenge is going to be case classes which unfortunately dont extend >> Product1, Product2, etc. >> > > -- Ryan Blue Software Engineer Netflix
