scala - Scala Compiler 2.10.4 は、Slick 2.0 を使用した HList モデルのコンパイルに失敗しますが、動作する場合があります。なんで？

Question

Slick2.0 の HList を使用すると、次のコンパイルエラーが発生します。ほとんどの場合、このエラーが発生しますが、このエラーが発生しない場合もあります。また、私は Scala IDE 3.0.3 を使用しており、Eclipse でコンパイルエラーが発生しないことにも注意してください (これは奇妙です)。を実行する前にすべての JVM プロセスを閉じようとしましたがsbt clean compile、それでも断続的には同じコンパイルエラーが発生します。

$ sbt clean compile
[info] Resolving org.scoverage#scalac-scoverage-plugin_2.10;0.99.5 ...
[info] Done updating.
[error] ...../app/models/example/Up.scala:77: type mismatch;
[error]  found   : Option[scala.slick.collection.heterogenous.HCons[Long,scala.slick.collection.heterogenous.HCons[Option[java.sql.Timestamp],scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HCons[Boolean,scala.slick.collection.heterogenous.HNil.type]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
[error]  required: Option[scala.slick.collection.heterogenous.syntax.::[Long,scala.slick.collection.heterogenous.syntax.::[Option[java.sql.Timestamp],scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.syntax.::[Boolean,scala.slick.collection.heterogenous.HNil.type]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]]
[error]            Up.unapply _
[error]               ^
[error] one error found
[error] (compile:compile) Compilation failed
[error] Total time: 20 s, completed 31 Oct, 2014 9:20:31 PM

問題のファイルは次のapp/models/example/Up.scalaとおりです。

package models.example

import play.api.db.slick.Config.driver.simple._
import scala.slick.lifted.Tag
import scala.slick.collection.heterogenous._
import java.sql.Timestamp


class Up(
  val id: Long, val createdDate: Option[Timestamp], val c2: Boolean,
  val c3: Boolean, val c4: Boolean, val c5: Boolean, val c6: Boolean,
  val c7: Boolean, val c8: Boolean, val c9: Boolean, val c10: Boolean,
  val c11: Boolean, val c12: Boolean, val c13: Boolean, val c14: Boolean,
  val c15: Boolean, val c16: Boolean, val c17: Boolean, val c18: Boolean,
  val c19: Boolean, val c20: Boolean, val c21: Boolean, val c22: Boolean,
  val c23: Boolean, val c24: Boolean, val c25: Boolean, val c26: Boolean,
  val c27: Boolean, val c28: Boolean, val c29: Boolean, val c30: Boolean,
  val c31: Boolean, val c32: Boolean, val c33: Boolean, val c34: Boolean,
  val c35: Boolean, val c36: Boolean, val c37: Boolean, val c38: Boolean,
  val c39: Boolean, val c40: Boolean, val c41: Boolean, val c42: Boolean,
  val c43: Boolean, val c44: Boolean, val c45: Boolean, val c46: Boolean)

object Up {
  def apply(
    id: Long, createdDate: Option[Timestamp],
    c2: Boolean, c3: Boolean, c4: Boolean, c5: Boolean,
    c6: Boolean, c7: Boolean, c8: Boolean, c9: Boolean, c10: Boolean,
    c11: Boolean, c12: Boolean, c13: Boolean, c14: Boolean, c15: Boolean,
    c16: Boolean, c17: Boolean, c18: Boolean, c19: Boolean, c20: Boolean,
    c21: Boolean, c22: Boolean, c23: Boolean, c24: Boolean, c25: Boolean,
    c26: Boolean, c27: Boolean, c28: Boolean, c29: Boolean, c30: Boolean,
    c31: Boolean, c32: Boolean, c33: Boolean, c34: Boolean, c35: Boolean,
    c36: Boolean, c37: Boolean, c38: Boolean, c39: Boolean, c40: Boolean,
    c41: Boolean, c42: Boolean, c43: Boolean, c44: Boolean, c45: Boolean,
    c46: Boolean
  ) = new Up(
    id, createdDate,
    c2, c3, c4, c5, c6, c7, c8, c9, c10, c11, c12,
    c13, c14, c15, c16, c17, c18, c19, c20, c21, c22, c23,
    c24, c25, c26, c27, c28, c29, c30, c31, c32, c33, c34,
    c35, c36, c37, c38, c39, c40, c41, c42, c43, c44, c45,
    c46
  )

  def unapply(x: Up) = {
    val data = x.id ::
    x.createdDate ::
    x.c2 :: x.c3 :: x.c4 :: x.c5 :: x.c6 :: x.c7 :: x.c8 :: x.c9 :: x.c10 ::
    x.c11 :: x.c12 :: x.c13 :: x.c14 :: x.c15 :: x.c16 :: x.c17 :: x.c18 :: x.c19 ::
    x.c20 :: x.c21 :: x.c22 :: x.c23 :: x.c24 :: x.c25 :: x.c26 :: x.c27 :: x.c28 ::
    x.c29 :: x.c30 :: x.c31 :: x.c32 :: x.c33 :: x.c34 :: x.c35 :: x.c36 :: x.c37 ::
    x.c38 :: x.c39 :: x.c40 :: x.c41 :: x.c42 :: x.c43 :: x.c44 :: x.c45 :: x.c46 ::
     HNil

     Option[data.type](data)
   }
 }

 class Ups(tag: Tag) extends Table[Up](tag, "ups") {
   def * = (
     id :: createdDate ::
       c2 :: c3 :: c4 :: c5 :: c6 :: c7 :: c8 :: c9 :: c10 :: c11 :: c12 :: c13 ::
       c14 :: c15 :: c16 :: c17 :: c18 :: c19 :: c20 :: c21 :: c22 :: c23 :: c24 ::
       c25 :: c26 :: c27 :: c28 :: c29 :: c30 :: c31 :: c32 :: c33 :: c34 :: c35 ::
       c36 :: c37 :: c38 :: c39 :: c40 :: c41 :: c42 :: c43 :: c44 :: c45 :: c46 ::
       HNil).shaped <> (
     {
       case x => Up(
         x(0), x(1), x(2),
         x(3), x(4), x(5), x(6), x(7), x(8), x(9), x(10), x(11), x(12), x(13),
         x(14), x(15), x(16), x(17), x(18), x(19), x(20), x(21), x(22), x(23), x(24),
         x(25), x(26), x(27), x(28), x(29), x(30), x(31), x(32), x(33), x(34), x(35),
         x(36), x(37), x(38), x(39), x(40), x(41), x(42), x(43), x(44), x(45), x(46)
       )
     },
         {
           Up.unapply _
         })

  def id = column[Long]("id", O.PrimaryKey, O.AutoInc, O.NotNull)
  def createdDate = column[Option[Timestamp]]("created_date")
  def c2 = column[Boolean]("c2")
  def c3 = column[Boolean]("c3")
  def c4 = column[Boolean]("c4")
  def c5 = column[Boolean]("c5")
  def c6 = column[Boolean]("c6")
  def c7 = column[Boolean]("c7")
  def c8 = column[Boolean]("c8")
  def c9 = column[Boolean]("c9")
  def c10 = column[Boolean]("c10")
  def c11 = column[Boolean]("c11")
  def c12 = column[Boolean]("c12")
  def c13 = column[Boolean]("c13")
  def c14 = column[Boolean]("c14")
  def c15 = column[Boolean]("c15")
  def c16 = column[Boolean]("c16")
  def c17 = column[Boolean]("c17")
  def c18 = column[Boolean]("c18")
  def c19 = column[Boolean]("c19")
  def c20 = column[Boolean]("c20")
  def c21 = column[Boolean]("c21")
  def c22 = column[Boolean]("c22")
  def c23 = column[Boolean]("c23")
  def c24 = column[Boolean]("c24")
  def c25 = column[Boolean]("c25")
  def c26 = column[Boolean]("c26")
  def c27 = column[Boolean]("c27")
  def c28 = column[Boolean]("c28")
  def c29 = column[Boolean]("c29")
  def c30 = column[Boolean]("c30")
  def c31 = column[Boolean]("c31")
  def c32 = column[Boolean]("c32")
  def c33 = column[Boolean]("c33")
  def c34 = column[Boolean]("c34")
  def c35 = column[Boolean]("c35")
  def c36 = column[Boolean]("c36")
  def c37 = column[Boolean]("c37")
  def c38 = column[Boolean]("c38")
  def c39 = column[Boolean]("c39")
  def c40 = column[Boolean]("c40")
  def c41 = column[Boolean]("c41")
  def c42 = column[Boolean]("c42")
  def c43 = column[Boolean]("c43")
  def c44 = column[Boolean]("c44")
  def c45 = column[Boolean]("c45")
  def c46 = column[Boolean]("c46")
}

object Ups {
  val ups = TableQuery[Ups]
  def get(id: Long)(implicit session: Session): Option[Up] = {ups.where(_.id === id).firstOption}
}

Scala Compiler のバグが原因かもしれないと思った - https://issues.scala-lang.org/browse/SI-8146

そのため、Scala 2.10.4 にアップグレードしましたが、それでもコンパイルエラーが発生します。

の内容build.sbt:

name := "play-sample"

version := "0.1-SNAPSHOT"

scalaVersion in ThisBuild := "2.10.4"

libraryDependencies ++= Seq(
  jdbc,
  anorm,
  cache,
  "org.webjars" %% "webjars-play" % "2.2.0",
  "org.webjars" % "bootstrap" % "3.1.1",
  "com.nulab-inc" %% "play2-oauth2-provider" % "0.7.1",
  "com.typesafe.play" %% "play-slick" % "0.6.1",
  "mysql" % "mysql-connector-java" % "5.1.18",
  "org.xerial" % "sqlite-jdbc" % "3.7.2"
)

play.Project.playScalaSettings

instrumentSettings

私は何を間違っていますか？

どうすればこれを修正できますか?

score 0 · Accepted Answer

この問題をここで報告したので、記録のために解決策を見つけました。

play 設定をオーバーライドし、Scala-2.10.4 をコンパイラとして設定する必要がありました。これがbuild.sbt現在の外観です。

play.Project.playScalaSettings

name := "play-sample"

version := "0.1-SNAPSHOT"

scalaVersion := "2.10.4"

libraryDependencies ++= Seq(
  jdbc,
  anorm,
  cache,
  "org.webjars" %% "webjars-play" % "2.2.0",
  "org.webjars" % "bootstrap" % "3.1.1",
  "com.nulab-inc" %% "play2-oauth2-provider" % "0.7.1",
  "com.typesafe.play" %% "play-slick" % "0.6.1",
  "mysql" % "mysql-connector-java" % "5.1.18",
  "org.xerial" % "sqlite-jdbc" % "3.7.2"
)

instrumentSettings

それは私にscalaバージョン2.10.3を示しました

[play-sample] $ scalaVersion
[info] 2.10.3

それから私は更新しましたbuild.sbt

[play-sample] $ scalaVersion
[info] 2.10.4

そして今、エラーなしで問題なくコンパイルされます。

scala - Scala Compiler 2.10.4 は、Slick 2.0 を使用した HList モデルのコンパイルに失敗しますが、動作する場合があります。なんで？

2 に答える 2

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