Velge kilde og mål nivå i KlassCorrespondence

[Bjoern-Rapp]

Description

Etter at kodelisten for Degurba har fått et nivå 2 ser jeg et behov for å kunne velge source_level og target_level i KlassCorrespondence.
Det finnes ingen slike parametere i endepunktet (corresponds), så et slik utvalg må eventuelt håndteres i ssb-klass-python.

[aecorn]

There are no levels on the correspondence objects.
So since children in the KLASS API dont give information about their parents, navigating up from a correspondence is only possible if you defined both parents as arguments for KlassCorrespondence, not the correspondence ID directly (see image).

This is one of many reasons why I want a new API to have "parent aware children" @mmwinther - its my number 1 pet-peeve with the KLASS-API.

So yes we could do this, if source_id and target_id were specified, but we would have to do two more requests to get both parent codelists, with filters on them, passing along arguments etc. Then using their codelists (and levels attached) to filter down the resulting correspondence...
Feel free to deliver a PR for this @Bjoern-Rapp