Question

I’m trying to define a route with an optional list as query parameter

GET /places controllers.Application.query(filter: Option[Seq[Int]])

but getting this error

conf/routes - PlayException: Compilation error [`)' expected but `]' found]

I know Play 2 handles Options well, and I want it to pass Seq to my custom QueryStringBindable, how to achieve this?

Answer 1

It seems like Play 2.0.2 routing parser doesn’t support nesting type parameters. I’ve found workaround, I’ve defined alias for Seq[Int]:

type IntSeq = Seq[Int]

and used it instead of original type:

GET /places controllers.Application.query(filter: Option[IntSeq])

Now it works as expected.