score:31

Accepted answer

In the SBT project class there should be a line:

 // Declare MySQL connector Dependency
  val mysql = "mysql" % "mysql-connector-java" % "5.1.12"

This will import the JDBC driver JAR file for MySQL.

Did you load the driver? If you use this Util class to fetch the connections, the driver will be loaded exactly one time:

// Util Class
object DaoUtil {
  import java.sql.{DriverManager, Connection}

  private var driverLoaded = false

  private def loadDriver()  {
    try{
      Class.forName("com.mysql.jdbc.Driver").newInstance
      driverLoaded = true
    }catch{
      case e: Exception  => {
        println("ERROR: Driver not available: " + e.getMessage)
        throw e
      }
    }
  }

  def getConnection(dbc: DbConnection): Connection =  {
    // Only load driver first time
    this.synchronized {
      if(! driverLoaded) loadDriver()
    }

    // Get the connection
    try{
      DriverManager.getConnection(dbc.getConnectionString)
    }catch{
      case e: Exception  => {
        println("ERROR: No connection: " + e.getMessage)
        throw e
      }
    }
  }
}

The code is taken from a simple SBT - MySQL tutorial I wrote some time ago. If you want to download the complete tutorial, see http://github.com/ollekullberg/SimpleOrder

score:2

The MySQL dependency must be configured in your build.sbt. Currently the style is to declare library dependencies like so:

libraryDependencies ++= {
  val liftVersion = "2.5.1"
  Seq(
    "net.liftweb"       %% "lift-webkit"        % liftVersion        % "compile",
    "net.liftweb"       %% "lift-mapper"        % liftVersion        % "compile",
    //etc
  )
}

Add the following inside the Seq to add mysql:

"mysql" % "mysql-connector-java" % "5.1.+"

Note that the + means that it will get the latest minor version; anything above 5.1, such as 5.1.27 (the current version at time of writing).

score:16

In the project/plugins.sbt file add a line

libraryDependencies += "mysql" % "mysql-connector-java" % "5.1.12"

Then if your in the sbt shell, restart it.


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