Slick code generator with Postgres in Play Framework - postgresql

Question

I'm new to Scala and Slick.
Trying to use code generator example from here https://github.com/slick/slick-codegen-example and change it to Postgres driver.
Here is my code in Build.Scala file:
import sbt._
import Keys._
import Tests._
object myBuild extends Build {
val slickVersion = "3.0.2"
lazy val mainProject = Project(
id="main",
base=file("."),
settings = Project.defaultSettings ++ Seq(
scalaVersion := "2.11.6",
libraryDependencies ++= List(
"com.typesafe.slick" %% "slick" % slickVersion,
"com.typesafe.slick" %% "slick-codegen" % slickVersion,
"org.slf4j" % "slf4j-nop" % "1.7.12",
"org.postgresql" % "postgresql" % "9.4-1201-jdbc41"
),
slick <<= slickCodeGenTask, // register manual sbt command
sourceGenerators in Compile <+= slickCodeGenTask // register automatic code generation on every compile, remove for only manual use
)
)
// code generation task
lazy val slick = TaskKey[Seq[File]]("gen-tables")
lazy val slickCodeGenTask =
(sourceManaged, dependencyClasspath in Compile, runner in Compile, streams) map { (dir, cp, r, s) =>
val outputDir = (dir / "slick").getPath // place generated files in sbt's managed sources folder
val url = "jdbc:postgresql://localhost:5432/db'" // connection info
val jdbcDriver = "org.postgresql.Driver"
val slickDriver = "slick.driver.PostgresDriver"
val pkg = "dao"
val user="postgres"
val password="pass"
toError(r.run("slick.codegen.SourceCodeGenerator", cp.files, Array(slickDriver, jdbcDriver, url, outputDir, pkg, user, password), s.log))
val fname = outputDir + "/dao/Tables.scala"
Seq(file(fname))
}
}
The only things I change were drivers and login, password. As I understand it should generate code each time I run
activator run
but it doesn't generate any code. Also, how it can be run manually?

Answer 1

You can add this to your build.sbt file:
val conf = ConfigFactory.parseFile(new File("conf/application.conf")).resolve()
slick <<= slickCodeGenTask
lazy val slick = TaskKey[Seq[File]]("gen-tables")
lazy val slickCodeGenTask = (sourceManaged, dependencyClasspath in Compile, runner in Compile, streams) map { (dir, cp, r, s) =>
val outputDir = (dir / "slick").getPath
val url = conf.getString("slick.dbs.default.db.url")
val jdbcDriver = conf.getString("slick.dbs.default.db.driver")
val slickDriver = conf.getString("slick.dbs.default.driver").dropRight(1)
val pkg = "test"
val user = conf.getString("slick.dbs.default.db.user")
val password = conf.getString("slick.dbs.default.db.password")
toError(r.run("slick.codegen.SourceCodeGenerator", cp.files, Array(slickDriver, jdbcDriver, url, outputDir, pkg, user, password), s.log))
val fname = outputDir + s"/$pkg/Tables.scala"
Seq(file(fname))
}
And run it with activator gen-tables