slick

In my project(play 2.4 with slick 3.0), I have a setup: using MySQL for production and H2 for unit testing(start to feel that it is a horrible idea). To do that, I have to import slick.driver.JdbcProfile instead of any specific driver (e.g. slick.driver.MySQLDriver ) and import its api._ in my DAO class, like this: class SomeDAO(val context: MyContext){ import context.profile.api._ import context.SOME_TYPE def invoke(para: SOME_TYPE) = { ... } // other DBIO... } Everything is OK so far, however, I have a service class that requires this DAO, and a type in context as a parameter: class

I'm trying to create a generic counter update method for a particular table. My table has many columns that are simply counters, and in my application I need to increment/decrement these counters. I was trying to create a method like this: private def updateCounter(column: String, id: Int, incr: Int)(implicit session: Session): Unit = { sqlu"update table1 set $column = $column + $incr where id=$id".first } I would then create a method that would call this (I don't want to expose this method outside of this Dao class). I am getting this error: [PSQLException: ERROR: syntax error at or near "$1"

I'm trying to convert anorm queries to slick in one of Play 2.3 samples , but I'm not sure how to implement dynamic sorting. This is the original method: def list(page: Int = 0, pageSize: Int = 10, orderBy: Int = 1, filter: String = "%"): Page[(Computer, Option[Company])] = { val offest = pageSize * page DB.withConnection { implicit connection => val computers = SQL( """ select * from computer left join company on computer.company_id = company.id where computer.name like {filter} order by {orderBy} nulls last limit {pageSize} offset {offset} """ ).on( 'pageSize -> pageSize, 'offset -> offest,

Please bear with me, there is some context until the OP makes sense. I'm using Slick 3.1.x and the slick code generator. btw The whole source code can be found in the play-authenticate-usage-scala github project . For this project I'd like to have a slick generic Dao to avoid repeating the same boilerplate code for every model. I have a postgres sql script that creates the database using evolutions here: 1.sql I then invoke a generator that generates the following data model: Tables.scala To be able to provide generic dao slick implementations for the model classes I need them to comply to

I'm working with Play! Scala 2.4 and Slick 3. I have a many to many relations as following: class Artists(tag: Tag) extends Table[Artist](tag, "artists") { def id = column[Long]("artistid", O.PrimaryKey, O.AutoInc) def name = column[String]("name") def * = (id.?, name) <> ((Artist.apply _).tupled, Artist.unapply) } The relation table: class ArtistsGenres(tag: Tag) extends Table[ArtistGenreRelation](tag, "artistsgenres") { def artistId = column[Long]("artistid") def genreId = column[Int]("genreid") def * = (artistId, genreId) <> ((ArtistGenreRelation.apply _).tupled, ArtistGenreRelation.unapply

Locally when I am developing my application I launch my play2 application using sbt run I love how I can make code changes, and then reload my browser to see my changes. After about roughly 10 code changes or so, I get a postgresql too many connection error (see below). My db connection is using the below DatabaseAccess.scala class. I'm guessing on each reload it is creating a bunch of connections to postgresql. In my Global am currently doing: override def onStart(app: Application) { Logger.info("Global.onStart") DatabaseAccess.loadConfiguration() } In production I am also worried that if I