play slick database configuration issues with postgres driver - postgresql

Question

I'm trying to set up a simple play 2.5 application with slick and postgres, but can't seem to get past an error.
The error I'm getting is
[error] p.a.d.s.DefaultSlickApi - Failed to create Slick database config for key default.
slick.SlickException: Error getting instance of profile "slick.jdbc.PostgresProfile"
...
Caused by: java.lang.InstantiationException: slick.jdbc.PostgresProfile
...
Caused by: java.lang.NoSuchMethodException: slick.jdbc.PostgresProfile.<init>()
...
I've got the following in my application.conf
slick.dbs.default {
driver = "slick.jdbc.PostgresProfile"
db = {
driver = "org.postgresql.Driver"
user = postgres
host = localhost
port = 5432
password = ""
host = ${?EVENTUAL_DB_HOST}
port = ${?EVENTUAL_DB_PORT}
user = ${?EVENTUAL_DB_USER}
password = ${?EVENTUAL_DB_PW}
url = "jdbc:postgresql://"${slick.dbs.default.db.host}":"${slick.dbs.default.db.port}"/"${slick.dbs.default.db.user}
}
}
and these in my dependencies
"com.typesafe.play" %% "play-slick" % "2.1.0",
"com.typesafe.slick" %% "slick-codegen" % "3.1.1",
"com.github.tminglei" %% "slick-pg" % "0.15.0-RC", //"0.14.6",
"org.postgresql" % "postgresql" % "42.0.0"
if I change slick.dbs.default.driver to slick.driver.PostgresDriver (which is now deprecated evidently) I get
[error] p.a.d.s.DefaultSlickApi - Failed to create Slick database config for key default.
slick.SlickException: Error getting instance of profile "slick.driver.PostgresDriver"
...
Caused by: java.lang.ClassNotFoundException: slick.driver.PostgresDriver
...
I'm about pulling my hair out here and can't find any other resources to look at. Does anyone have any idea what's going on?

Answer 1

Sure enough, by recommendation of insan-e, all I had to do was add a $. So slick.dbs.default.driver should be "slick.jdbc.PostgresProfile$".