Slick: create database - scala

Question

Is there a way to get slick to create the database if it doesn't already exist?
Database.forURL("jdbc:mysql://127.0.0.1/database", driver = "com.mysql.jdbc.Driver", user = "root") withSession {
// create tables, insert data
}
"database" doesn't exist, so I want slick to create it for me. Any ideas? Thanks.

Answer 1

The answer above is relevant to Slick 2.x where withSession is deprecated,
so this is how it is done with Slick 3.0.0 API :
import scala.concurrent.Await
import scala.concurrent.duration._
import org.postgresql.util.PSQLException
import slick.driver.PostgresDriver
import slick.driver.PostgresDriver.api._
object SlickPGUtils {
private val actionTimeout = 10 second
private val driver = "org.postgresql.Driver"
def createDb(host: String, port: Int, dbName: String, user: String, pwd: String) = {
val onlyHostNoDbUrl = s"jdbc:postgresql://$host:$port/"
using(Database.forURL(onlyHostNoDbUrl, user = user, password = pwd, driver = driver)) { conn =>
Await.result(conn.run(sqlu"CREATE DATABASE #$dbName"), actionTimeout)
}
}
def dropDb(host: String, port: Int, dbName: String, user: String, pwd: String) = {
val onlyHostNoDbUrl = s"jdbc:postgresql://$host:$port/"
try {
using(Database.forURL(onlyHostNoDbUrl, user = user, password = pwd, driver = driver)) { conn =>
Await.result(conn.run(sqlu"DROP DATABASE #$dbName"), actionTimeout)
}
} catch {
// ignore failure due to db not exist
case e:PSQLException => if (e.getMessage.equals(s""""database "$dbName" does not exist""")) {/* do nothing */}
case e:Throwable => throw e // escalate other exceptions
}
}
private def using[A <: {def close() : Unit}, B](resource: A)(f: A => B): B =
try {
f(resource)
} finally {
Try {
resource.close()
}.failed.foreach(err => throw new Exception(s"failed to close $resource", err))
}
}

Answer 2

You can connect to the database engine using only "jdbc:mysql://localhost/" as JDBC URL and then issue a pure SQL create database query:
import scala.slick.driver.MySQLDriver.simple._
import scala.slick.jdbc.{StaticQuery => Q}
object Main extends App
{
Database.forURL("jdbc:mysql://localhost/", driver = "com.mysql.jdbc.Driver") withSession {
implicit session =>
Q.updateNA("CREATE DATABASE `dataBaseName`").execute
.
.
.
}
}