Scalatra / Slick and insert IF NOT EXISTS

Question

I am a newbie so hoping for some patience. :)

I am trying to populate two tables if a value does not exist. Basically I have:

TABLE b
(
    id VARCHA         


        

Answer 1

In Slick 1.0.1

db.withTransaction{ implicit session : Session =>
  if( ! Query(b).filter(_.id==="something").exists.run ){
    b.insert( "something" )
    d.insert( (1,"something") )
  }
}

In Slick 2.0

val b = TableQuery[b]
db.withTransaction{ implicit session =>
  if( ! b.filter(_.id==="something").exists.run ){
    b += "something"
    d += (1,"something")
  }
}