How do you run a patch/partial database UPDATE in Scala Slick?

Question

We\'d like to run a patch/partial UPDATE with Slick (3.0.0) so that we only modify some of the fields in a record. Exactly which fields will be updated exactly will

Answer 1

You already have answers as written by @pedrorijo91 and @thirstycow but i'll try to explain why this doesnt work.

I'm havent used slick 3 but im guessing its because the map function doesnt return a consistent type for it to run update against. As a thought experiment, if you cut your call at map what do you think the type will be?

val partialQuery:??? = people.filter(_.name === "M Odersky")
       .map(p => 
           (name, age) match {
              case (Some(_), Some(_)) => (p.name, p.age)
              case (Some(_), None)    => (p.name)
              case (None   , Some(_)) => (p.age)
           }
       );

val fullQuery:??? = partialQuery.update {
       (name, age) match {
          case (Some(_), Some(_)) => (name.get, age.get)
          case (Some(_), None)    => (name.get)
          case (None   , Some(_)) => (age.get)
       }    
}

The matcher returns different "shapes" at compile time which im guessing will revert to Any type.