Slick 3 for scala update query not functioning - slick

Question

First of I would like to state that I am new to slick and am using version 3.1.1 . I been reading the manual but i am having trouble getting my query to work. Either something is wrong with my connection string or something is wrong with my Slick code. I got my config from here http://slick.typesafe.com/doc/3.1.1/database.html and my update example from here bottom of page http://slick.typesafe.com/doc/3.1.1/queries.html . Ok so here is my code
Application Config.
mydb= {
dataSourceClass = org.postgresql.ds.PGSimpleDataSource
properties = {
databaseName = "Jsmith"
user = "postgres"
password = "unique"
}
numThreads = 10
}
My Controller -- Database table is called - relations
package controllers
import play.api.mvc._
import slick.driver.PostgresDriver.api._
class Application extends Controller {
class relations(tag: Tag) extends Table[(Int,Int,Int)](tag, "relations") {
def id = column[Int]("id", O.PrimaryKey)
def me = column[Int]("me")
def following = column[Int]("following")
def * = (id,me,following)
}
val profiles = TableQuery[relations]
val db = Database.forConfig("mydb")
try {
// ...
} finally db.close()
def index = Action {
val q = for { p <- profiles if p.id === 2 } yield p.following
val updateAction = q.update(322)
val invoker = q.updateStatement
Ok()
}
}
What could be wrong with my code above ? I have a separate project that uses plain JDBC and this configuration works perfectly for it
db.default.driver=org.postgresql.Driver
db.default.url="jdbc:postgresql://localhost:5432/Jsmith"
db.default.user="postgres"
db.default.password="unique"

Answer 1

You did not run your action yet. db.run(updateAction) executes your query respectively your action on a database (untested):
def index = Action.async {
val q = for { p <- profiles if p.id === 2 } yield p.following
val updateAction = q.update(322)
val db = Database.forConfig("mydb")
db.run(updateAction).map(_ => Ok())
}
db.run() returns a Future which will be eventually completed. It is then simply mapped to a Result in play.
q.updateStatement on the other hand just generates a sql statement. This can be useful while debugging.

Answer 2

Look the code from my project:
def updateStatus(username: String, password: String, status: Boolean): Future[Boolean] = {
db.run(
(for {
user <- Users if user.username === username
} yield {
user
}).map(_.online).update(status)
}