A binding to play.api.db.DBApi was already configured, evolutions and injector error with play-slick

Question

I want to introduce slick to my play project, so I add the following dependencies to build.sbt:

"com.typesafe.play"          %% "play-slick"               % "1.0.1"     withSources(),   "com.typesafe.play"          %% "play-slick-evolutions"    % "1.0.1"     withSources(), 

Then, when I run an integration spec for controller I got following exception both on Intellij IDE and command line activator test. After Google I found the solution: https://www.playframework.com/documentation/2.4.x/PlaySlickFAQ#A-binding-to-play.api.db.DBApi-was-already-configured

After I removed the jdbc dependency, the integration spec passed when I using the command line, however I still got the same error when I run the test on Intellij IDE as following error: Exception encountered when invoking run on a nested suite - Unable to create injector, see the following errors:

1) A binding to play.api.db.DBApi was already configured at play.api.db.DBModule.bindings(DBModule.scala:25): Binding(interface play.api.db.DBApi to ProviderConstructionTarget(class play.api.db.DBApiProvider)) (via modules: com.google.inject.util.Modules$OverrideModule -> play.api.inject.guice.GuiceableModuleConversions$$anon$1).   at play.api.db.slick.evolutions.EvolutionsModule.bindings(EvolutionsModule.scala:15): Binding(interface play.api.db.DBApi to ConstructionTarget(class play.api.db.slick.evolutions.internal.DBApiAdapter) in interface javax.inject.Singleton) (via modules: com.google.inject.util.Modules$OverrideModule -> play.api.inject.guice.GuiceableModuleConversions$$anon$1)  1 error com.google.inject.CreationException: Unable to create injector, see the following errors:  1) A binding to play.api.db.DBApi was already configured at play.api.db.DBModule.bindings(DBModule.scala:25): Binding(interface play.api.db.DBApi to ProviderConstructionTarget(class play.api.db.DBApiProvider)) (via modules: com.google.inject.util.Modules$OverrideModule -> play.api.inject.guice.GuiceableModuleConversions$$anon$1).   at play.api.db.slick.evolutions.EvolutionsModule.bindings(EvolutionsModule.scala:15): Binding(interface play.api.db.DBApi to ConstructionTarget(class play.api.db.slick.evolutions.internal.DBApiAdapter) in interface javax.inject.Singleton) (via modules: com.google.inject.util.Modules$OverrideModule -> play.api.inject.guice.GuiceableModuleConversions$$anon$1)  1 error     at com.google.inject.internal.Errors.throwCreationExceptionIfErrorsExist(Errors.java:466)     at com.google.inject.internal.InternalInjectorCreator.initializeStatically(InternalInjectorCreator.java:155)     at com.google.inject.internal.InternalInjectorCreator.build(InternalInjectorCreator.java:107)     at com.google.inject.Guice.createInjector(Guice.java:96)     at com.google.inject.Guice.createInjector(Guice.java:73)     at com.google.inject.Guice.createInjector(Guice.java:62)     at play.api.inject.guice.GuiceBuilder.injector(GuiceInjectorBuilder.scala:126)     at play.api.inject.guice.GuiceApplicationBuilder.build(GuiceApplicationBuilder.scala:93)     at play.api.test.FakeApplication.<init>(Fakes.scala:216)     at org.scalatestplus.play.OneServerPerSuite$class.app(OneServerPerSuite.scala:152) 

Answer 1

If you are like me, you have something like this in your build.sbt

libraryDependencies ++= Seq(   jdbc,   cache,   ws,   specs2 % Test,   "mysql" % "mysql-connector-java" % "5.1.37",   "com.typesafe.play" %% "play-slick" % "1.1.1",   "com.typesafe.play" %% "play-slick-evolutions" % "1.1.1" ) 

remove jdbc

libraryDependencies ++= Seq(   //jdbc, //<<---- this one here   cache, 

Answer 2

You have probably added dependency to jdbc which doesn't make sense if you use slick for it. Remove it and it will work.