left join in Slick

gistfile1.txt

  case class File(id: Int, path: String, fileType: String, size: Int, uid: Int)

  class Files(tag: Tag) extends Table[File](tag, "files") {
    def id = column[Int]("fid", O.PrimaryKey)
    def path = column[String]("filepath")
    def fileType = column[String]("filemime")
    def size = column[Int]("filesize")
    def uid = column[Int]("uid")
    def * = (id, path, fileType, size, uid) <> (File.tupled, File.unapply _)
  }

  class Recipes(tag: Tag) extends Table[(Int, Option[Int])](tag, "content_type_recipes") {
    def id = column[Int]("nid")
    def imageFid = column[Option[Int]]("field_recipeimage_fid")
    def * = (id, imageFid)
  }

  val files = TableQuery[Files]
  val recipes = TableQuery[Recipes]

val joinedQ = for {
      (r, f) <- recipes leftJoin files on (_.imageFid === _.id)
} yield (r, f)

When I run this I get
scala.slick.SlickException: Read NULL value for ResultSet column Path s2._3