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build.sbtでのunresolved dependencyを解決する

Last updated at Posted at 2016-09-23

現象

ScalaのPlayFrameworkを利用する際,build.sbtファイルが外部ライブラリを読み込まず、Unresolved dependency(ライブラリ依存関係が解決できない旨の)エラーを吐く。

環境

Mac OSX
Intellij IDEA
scala 2.11.8
sbt 0.13
playframework 2.5

解決策

build.sbtでplay-slickを入れたいとする.
以下のようにversionを指定してあげる。
moduleのversionはIntellijの場合、Cmdを二回押したときに画面右端に出てくる
SBT->{project_name}->root->Dependenciesから確認できる.

build.sbt
scalaVersion := "2.11.8"

libraryDependencies ++= Seq(
  jdbc,
  cache,
  ws,
-  "com.typesafe.play" %% "play-slick" % "2.0.0"
+  "com.typesafe.play" % "play-slick_2.11" % "2.0.0"
)

why

%%指定子を用いた場合バージョン指定をsbt任せにできるが、この場合sbtはplay-slick_2.11.8を捜査しているっぽい。
%を用いてバージョン指定することでunresolved dependencyから逃れられた.

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