一切都适用于 Play 2.2.1。
但是，当升级到 Play 2.2.2 并部署到 Heroku 时，进程会发出以下警告：
sbt.ResolveException: unresolved dependency: com.typesafe.play#play_2.10;2.2.2: not found
unresolved dependency: com.typesafe.play#play-cache_2.10;2.2.2: not found
unresolved dependency: com.typesafe.play#filters-helpers_2.10;2.2.2: not found
unresolved dependency: com.typesafe.play#play-test_2.10;2.2.2: not found
unresolved dependency: com.typesafe.play#play-docs_2.10;2.2.2: not found
我不明白为什么..我刚刚将plugins.sbt更新为：
// Comment to get more information during initialization
logLevel := Level.Warn
// The Typesafe repository
resolvers += "Typesafe repository" at "http://repo.typesafe.com/typesafe/releases/"
// Use the Play sbt plugin for Play projects
addSbtPlugin("com.typesafe.play" % "sbt-plugin" % "2.2.2") //just added 2.2.2 instead of 2.2.1
并将sbt升级到0.13.0。
如果没有在 Build.scala 上显式设置，是否应该下载此依赖项？
好吧，我设法通过在我的系列之前添加这一行来实现这一点resolvers +=:
resolvers := Seq("typesafe" at "http://repo.typesafe.com/typesafe/releases/")
如果它可以帮助一些遇到同样问题的人:)
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