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Scalaを習う昨日から、私はMongoDBインデックス（これはうまく動作します）と対話するプロジェクトを構築し、ScalaJSを使って同じことを行います。ここでScalaJSとMongoDBドライバ：存在しないクラスを参照
は私build.sbtです：
enablePlugins(ScalaJSPlugin)
name := "demographics"
version := "1.0"
scalaVersion := "2.12.1"
libraryDependencies += "org.mongodb.scala" %% "mongo-scala-driver" % "1.2.1"
libraryDependencies += "be.doeraene" %%% "scalajs-jquery" % "0.9.1"
libraryDependencies += "org.scala-js" %%% "scalajs-dom" % "0.9.1"
skip in packageJSDependencies := false
jsDependencies +=
"org.webjars" % "jquery" % "3.1.1"/"3.1.1/jquery.js"
と私のメインのファイル：
package demographics.webapp
import org.mongodb.scala._
import scala.scalajs.js.JSApp
object DemographicsApp extends JSApp {
def main(): Unit = {
// connect to the bdd
val mongoClient: MongoClient = MongoClient()
val database: MongoDatabase = mongoClient.getDatabase("demographics")
val collection: MongoCollection[Document] = database.getCollection("demographics")
}
}
非常に基本的な：ちょうどコレクションに接続します。
悲しいこと、私はSBTシェルの「fastOptJS」を起動すると、次のエラーが表示されます。
[info] Compiling 1 Scala source to C:\...\target\scala-2.12\classes...
[info] Fast optimizing C:\...\target\scala-2.12\untitled1-fastopt.js
[error] Referring to non-existent class org.mongodb.scala.bson.DefaultHelper$DefaultsTo$
[error] called from demographics.webapp.DemographicsApp$.main()scala.Unit
[error] called from scala.scalajs.js.JSApp.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.PrenomApp$.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.DemographicsApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] demographics.webapp.PrenomApp$
[error] Referring to non-existent class org.mongodb.scala.MongoClient$
[error] called from demographics.webapp.DemographicsApp$.main()scala.Unit
[error] called from scala.scalajs.js.JSApp.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.PrenomApp$.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.DemographicsApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] demographics.webapp.DemographicsApp$
[error] Referring to non-existent class org.mongodb.scala.bson.collection.immutable.Document
[error] called from demographics.webapp.DemographicsApp$.main()scala.Unit
[error] called from scala.scalajs.js.JSApp.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.PrenomApp$.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.DemographicsApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] demographics.webapp.DemographicsApp$
[error] Referring to non-existent method org.mongodb.scala.bson.DefaultHelper$DefaultsTo$.$default()org.mongodb.scala.bson.DefaultHelper$DefaultsTo
[error] called from demographics.webapp.DemographicsApp$.main()scala.Unit
[error] called from scala.scalajs.js.JSApp.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.PrenomApp$.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.DemographicsApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] demographics.webapp.DemographicsApp$
[error] Referring to non-existent method org.mongodb.scala.MongoClient$.apply()org.mongodb.scala.MongoClient
[error] called from demographics.webapp.DemographicsApp$.main()scala.Unit
[error] called from scala.scalajs.js.JSApp.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.PrenomApp$.$$js$exported$meth$main()java.lang.Object
[error] called from demographics.webapp.DemographicsApp$.main
[error] exported to JavaScript with @JSExport
[error] involving instantiated classes:
[error] demographics.webapp.DemographicsApp$
[trace] Stack trace suppressed: run last compile:fastOptJS for the full output.
[error] (compile:fastOptJS) There were linking errors
（メインファイルに適応して）同じコードがなぜ、バニラScalaのプロジェクトに取り組んでいますこのエラーは表示されますか？