slick

I'm following the Slick documentation example for autoincrementing fields and I'm having trouble creating a mapped projection that ... well, only has one column. case class UserRole(id: Option[Int], role: String) object UserRoles extends Table[UserRole]("userRole") { def id = column[Int]("ID", O.PrimaryKey, O.AutoInc) def role = column[String]("ROLE") // ... def * = id.? ~ role <> (UserRole, UserRole.unapply _) // NEXT LINE ERRORS OUT def forInsert = role <> ({t => UserRole(None, t._1)}, {(r: UserRole) => Some((r.role))}) returning id } The error is "value <> is not a member of scala.slick

The ScalaDoc of the functions has not been filled out. I know that the methods are used for mimicking SQL's IN keyword (eg, SELECT * FROM table WHERE id IN VALUES(1, 42, 101) could be done with table.filter(_.id inSet Seq(1, 42, 101)) ). I don't know what this "bind" version is or how to choose which I should be using. virtualeyes inSet is an unsafe version of inSetBind which generates a safe/escaped sql value based on passed in input. In your example where the value is manually set, the two types of bind are equally safe. Normally with bound parameters you get a performance boost (via

Ok, I've got a method with multiple optional arguments like this def(username: Option[String], petname: Option[String], favouritefood: Option[String]) and i want to write a dynamic query that will be capable of fetching the data of defined arguments in a way of this select * from table where un like username or pn like pn or ff like ff; so depending of which arguments are defined to add them to query with OR operator? Something like this should work. I had to use a similiar fragment in my own code and it is also close to what cvogt proposes in above comment (I think). val username = Option("")

This is a problem derived from another question . I need to be able to dynamically pass a column to be sorted on in a Slick query which has a left join. The problem in this particular situation is that left joined table becomes optional and I have no idea how to handle that. If I make table Company not optional I'm getting SlickException: Read NULL value for ResultSet column Path Example: def list(filter: String, orderBy: Int) = { DB.withDynSession { val data = for { (computer, company) <- Computer.where(_.name like filter) leftJoin Company on (_.companyId === _.id) } yield (computer, company.