Slick: create query conjunctions/disjunctions dynamically

Question

I\'m trying to create a typesafe dynamic DSL for a Slick table but not sure how to achieve this.

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Answer 1

I was looking for the same thing, and came across this question - the accepted answer was a very heavy inspiration to what I eventually landed on. Details are here.

The only comments I'd make about the accepted answer - TablePredicate[Item, T <: Table[Item]] can just be simplified to TablePredicate[T <: Table[_]] because Item is never used (at least in the sample). LiteralColumn(1) === LiteralColumn(1) can also just be LiteralColumn(Some(true)) (makes the generated queries slightly less awkward) - I'm pretty sure with a little more work, these could be eliminated entirely.