在 Play Framework 中使用 SORM 会导致抛出反射异常 [英] Using SORM with Play Framework causes reflection exceptions to be thrown

问题描述

我一直在尝试让 SORM 与 Play Framework 2.2-SNAPSHOT 以及 2.1.1 一起使用.目前，我正在尝试运行我创建的简约示例应用程序，以便更轻松地追踪问题.不幸的是，我收到的错误消息根本没有帮助我.

I've been trying to get SORM working with Play Framework 2.2-SNAPSHOT as well as 2.1.1. Currently I'm trying to run a minimalistic sample application that I created in order to track down the issue more easily. Unfortunately the error message I receive doesn't help me at all.

val appDependencies = Seq(
    "org.sorm-framework" % "sorm" % "0.3.8",
    "com.h2database" % "h2" % "1.3.168"
)

<小时>

# Database configuration
#
db.default.driver=org.h2.Driver
db.default.url="jdbc:h2:mem:play"
# db.default.user=sa
# db.default.password=""

<小时>

case class Car( brand: String, wheels: Int )

object Db extends Instance( Seq( Entity[Car]() ), "jdbc:h2:mem:play" )

<小时>

object Application extends Controller {
  def index = Action {
    Db.query[Car].count()
    Ok("hello wolrd")
  }
}

此堆栈跟踪中的结果:

play.api.Application$$anon$1: Execution exception[[RuntimeException: java.lang.NoSuchMethodError: scala.reflect.internal.TreeInfo.firstArgument(Lscala/reflect/internal/Trees$Tree;)Lscala/reflect/internal/Trees$Tree;]]
    at play.api.Application$class.handleError(Application.scala:289) ~[play_2.10.jar:2.1.1]
    at play.api.DefaultApplication.handleError(Application.scala:383) [play_2.10.jar:2.1.1]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$17$$anonfun$apply$24.apply(PlayDefaultUpstreamHandler.scala:326) [play_2.10.jar:2.1.1]
    at play.core.server.netty.PlayDefaultUpstreamHandler$$anonfun$17$$anonfun$apply$24.apply(PlayDefaultUpstreamHandler.scala:324) [play_2.10.jar:2.1.1]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) [play_2.10.jar:2.1.1]
    at play.api.libs.concurrent.PlayPromise$$anonfun$extend1$1.apply(Promise.scala:113) [play_2.10.jar:2.1.1]
java.lang.RuntimeException: java.lang.NoSuchMethodError: scala.reflect.internal.TreeInfo.firstArgument(Lscala/reflect/internal/Trees$Tree;)Lscala/reflect/internal/Trees$Tree;
    at play.api.mvc.ActionBuilder$$anon$1.apply(Action.scala:222) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5$$anonfun$apply$6.apply(Action.scala:109) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5$$anonfun$apply$6.apply(Action.scala:109) ~[play_2.10.jar:2.1.1]
    at play.utils.Threads$.withContextClassLoader(Threads.scala:18) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5.apply(Action.scala:108) ~[play_2.10.jar:2.1.1]
    at play.api.mvc.Action$$anonfun$apply$1$$anonfun$apply$2$$anonfun$apply$5.apply(Action.scala:106) ~[play_2.10.jar:2.1.1]
Caused by: java.lang.NoSuchMethodError: scala.reflect.internal.TreeInfo.firstArgument(Lscala/reflect/internal/Trees$Tree;)Lscala/reflect/internal/Trees$Tree;
    at scala.tools.nsc.typechecker.Typers$Typer.parentTypes(Typers.scala:1550) ~[scala-compiler.jar:na]
    at scala.tools.nsc.typechecker.Namers$Namer.templateSig(Namers.scala:861) ~[scala-compiler.jar:na]
    at scala.tools.nsc.typechecker.Namers$Namer.getSig$1(Namers.scala:1300) ~[scala-compiler.jar:na]
    at scala.tools.nsc.typechecker.Namers$Namer.typeSig(Namers.scala:1347) ~[scala-compiler.jar:na]
    at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply$mcV$sp(Namers.scala:709) ~[scala-compiler.jar:na]
    at scala.tools.nsc.typechecker.Namers$Namer$$anonfun$monoTypeCompleter$1$$anonfun$apply$1.apply(Namers.scala:708) ~[scala-compiler.jar:na]

推荐答案

好的.这不是一个错误.SORM 0.3.8 依赖于 Scala 2.10.1，Play 2.1.x 使用 Scala 2.10.0.您得到的异常是由 Play 混合来自两个 Scala 版本的工件引起的.

Okay. It's not a bug. SORM 0.3.8 depends on Scala 2.10.1 and Play 2.1.x uses Scala 2.10.0. The exceptions you get are caused by Play mixing artifacts from both Scala versions.

要解决此问题，您只需添加 scalaVersion :="2.10.1"<告诉 Play 使用正确的 Scala 版本即可 到文件 project/Build.scala 中的项目设置.

To fix this issue all you need to do is just tell Play to use a proper Scala version by adding scalaVersion := "2.10.1" to project settings in a file project/Build.scala.

最终的构建脚本可能如下所示:

The final build script may look like this:

object ApplicationBuild extends Build {

  val appName         = "play-test"
  val appVersion      = "1.0-SNAPSHOT"

  val appDependencies = Seq(
    "org.sorm-framework" % "sorm" % "0.3.8",
    "com.h2database" % "h2" % "1.3.168"
  )

  val main = play.Project(appName, appVersion, appDependencies).settings(
    resolvers += 
      "Local Maven Repository" at 
      "file:///"+Path.userHome.absolutePath+"/.m2/repository",
    scalaVersion := "2.10.1" // <--- ! This is the fix !
  )

}

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