scala 多 sbt 项目 : object is not a member of package, 未找到类型

Question

如何导入类 abc来自项目 main由项目中的另一个类使用 web在 multi-project sbt配置？

在 sbt compile我得到:object abc is not a member of package comnot found: type abc
虽然从 IntelliJ 内部编译成功。

build.sbt

lazy val main = project.in(file("main"))
  .settings(commonSettings: _*)

lazy val web = project.in(file("web"))
  .settings(commonSettings: _*)
  .enablePlugins(PlayScala)
  .dependsOn(main)

lazy val root = (project in file("."))
  .dependsOn(web, main)
  .aggregate(web, main)
  .settings(commonSettings: _*)


mainClass in root in Compile := (mainClass in web in Compile).value

fullClasspath in web in Runtime ++= (fullClasspath in main in Runtime).value

fullClasspath in root in Runtime ++= (fullClasspath in web in Runtime).value

内 网络项目 :

package com.company.web.controllers
import _root_.com.company.main.abc // also tried without root. 
// Intellij recognizes the import successuflly

class Posts @Inject() (repo : abc) extends Controller { ..

内 主体工程 :

package com.company.main
class abc @Inject() (){

可能有什么问题？
谢谢。

Answer 1

翻出项目main的目录结构不是根据 maven目录结构，如 described here

src/
  main/
    scala/
       com/bla/bla
  test/
    scala/
       <test Scala sources

Intellij 成功编译了该项目，因为无论旧目录结构到位，它都被标记为 source directory下 File -> project structure -> modules -> sources