Playframework Project无法访问Play mulit模块项目中的依赖项？

我一直在尝试将我的游戏项目分为几个模块。我跟着。一切都进行得很顺利，我进行了工作测试

在我重写主项目中的一个控制器以使用模块中的服务之后，我开始出现大量错误

Play似乎找不到某些依赖项。我犯了这个错误

object ws is not a member of package play.api.libs 
import play.api.libs.ws.WS

当我转到该文件时，它能够找到play.libs.WS，但不能找到play.api.libs.WS.WS

我的Build.scala如下所示：

val srcMain = Seq(
   scalaSource in Compile <<= (sourceDirectory in Compile)(identity),
   javaSource in Compile <<= (sourceDirectory in Compile)(identity),
   resourceDirectory in Compile <<= (sourceDirectory / "conf")(identity),
   scalaSource in Test <<= (sourceDirectory in Test)(identity),
   parallelExecution in Test := false
 )

lazy val modules = Seq(mod)

def projectToRef(p: Project): ProjectReference = LocalProject(p.id)

lazy val moduleRefs = modules map projectToRef

lazy val mod = Project("mod", file("modules/mod"), settings = buildSettings ++ srcMain)
   .settings(
     libraryDependencies ++= Seq(
       /* Some dependencies */
     )
   )

lazy val main = play.Project(appName, appVersion, appDependencies, settings = Resolvers.all)
  .dependsOn(api)

lazy val api = Project("api", file("modules/api"), settings = buildSettings ++ srcMain).settings(
    libraryDependencies ++= Seq(
      cache, apache
    )
  ) aggregate (moduleRefs: _*)

override def rootProject = Some(main)

val mainSettings = Seq(
   scalaSource in Compile := sourceDirectory in Compile,
   javaSource in Compile := sourceDirectory in Compile,
   resourceDirectory in Compile := sourceDirectory / "conf",
   scalaSource in Test := sourceDirectory in Test,
   parallelExecution in Test := false
 )

lazy val mod = (project in file("modules/mod")).settings(buildSettings ++ mainSettings: _*).settings(
  libraryDependencies ++= Seq(
    /* Some dependencies */
  )
)

lazy val main = play.Project(appName, appVersion, appDependencies, settings = Resolvers.all)
  .dependsOn(api)

lazy val api = (project in file("modules/api")).settings(buildSettings ++ mainSettings: _*).settings(
  libraryDependencies ++= Seq(
    cache, apache
  )
) aggregate mod

override def rootProject = Some(main)

您的project/build.scala实际上可以如下所示：

val srcMain = Seq(
   scalaSource in Compile <<= (sourceDirectory in Compile)(identity),
   javaSource in Compile <<= (sourceDirectory in Compile)(identity),
   resourceDirectory in Compile <<= (sourceDirectory / "conf")(identity),
   scalaSource in Test <<= (sourceDirectory in Test)(identity),
   parallelExecution in Test := false
 )

lazy val modules = Seq(mod)

def projectToRef(p: Project): ProjectReference = LocalProject(p.id)

lazy val moduleRefs = modules map projectToRef

lazy val mod = Project("mod", file("modules/mod"), settings = buildSettings ++ srcMain)
   .settings(
     libraryDependencies ++= Seq(
       /* Some dependencies */
     )
   )

lazy val main = play.Project(appName, appVersion, appDependencies, settings = Resolvers.all)
  .dependsOn(api)

lazy val api = Project("api", file("modules/api"), settings = buildSettings ++ srcMain).settings(
    libraryDependencies ++= Seq(
      cache, apache
    )
  ) aggregate (moduleRefs: _*)

override def rootProject = Some(main)

val mainSettings = Seq(
   scalaSource in Compile := sourceDirectory in Compile,
   javaSource in Compile := sourceDirectory in Compile,
   resourceDirectory in Compile := sourceDirectory / "conf",
   scalaSource in Test := sourceDirectory in Test,
   parallelExecution in Test := false
 )

lazy val mod = (project in file("modules/mod")).settings(buildSettings ++ mainSettings: _*).settings(
  libraryDependencies ++= Seq(
    /* Some dependencies */
  )
)

lazy val main = play.Project(appName, appVersion, appDependencies, settings = Resolvers.all)
  .dependsOn(api)

lazy val api = (project in file("modules/api")).settings(buildSettings ++ mainSettings: _*).settings(
  libraryDependencies ++= Seq(
    cache, apache
  )
) aggregate mod

override def rootProject = Some(main)

---

我不明白你为什么要在mainSettings中进行重新分配？你能分享一下主要设置背后的想法吗？您认为play.api.libs.ws.ws如何应用于您的项目？谁带进来的？您是否应该将ws-Play模块作为依赖项添加到main或api中？

您是否无意中更改了播放版本？你能给我们看一下你的版本定义吗？你肯定没有改变播放版本。你现在使用的播放版本是2.2？你还可以添加project/plugins.sbt吗？添加了plugins.sbt。看起来你有一个play java项目，而不是play scalaIt，它应该指定在哪里找到源文件。好吧，我确实理解这些设置的含义以及你在语法上做什么，但我不明白你为什么这么做。你能在GitHub上分享这个项目吗？这样可以更容易地帮助你缩小这个问题？不用担心。我回应了上面的另一位评论。问题在于依赖关系。