Inserting default values if column value is 'None' using slick

Question

My problem is simple.

I have a column seqNum: Double which is NOT NULL DEFAULT 1 in CREATE TABLE statement as follows:

<

Answer 1

Either you enforce the Option passed to Slick by suffixing it with a .getOrElse(theDefault), or you make the DB accepts NULL (from a None value) and defaults it using some trigger.

Answer 2

Using the default requires not inserting the value at all rather than inserting NULL. This means you will need a custom projection to insert to.

people.map(_.name).insert("Chris") will use defaults for all other fields. The limitations of scala's native tuple transformations and case class transformations can make this a bit of a hassle. Things like Slick's HLists, Shapeless, Scala Records or Scala XR can help, but are not trivial or very experimental at the moment.