I saw @UK0810AQ2 mentioning something about a proof-of-concept here: https://clojurians.slack.com/archives/C053AK3F9/p1673410476605509?thread_ts=1673402053.813639&cid=C053AK3F9

https://gist.github.com/bsless/fc0c48c2f983cf0243f0bd72c44d1d0bb I need to flesh this out

404, looks like it is private gist

@UK0810AQ2 Would you mind sharing what you've got?

I'll fix it when I get home

@U04V4KLKC @U052XLL3A try now https://gist.github.com/bsless/fc0c48c2f983cf0243f0bd72c44d1d0b

@U02CV2P4J6S here

that’s an empty map with one property :foo :thinking_face:

Grah, sorry, typo. 🙂

[:map [:foo {:default :bar} keyword?]]

https://github.com/metosin/malli#value-transformation mt/default-value-transformer

Hmm, right, I know about that, but I was wondering whether I could introspect the schema to figure out the default value for a given key. But now that you mention it, using value transformation is probably the better route. 👍 Thanks!

(:default (m/properties (mu/get map-schema :foo))) might work

I tried that earlier, but it doesn’t seem to:

(malli.core/properties (malli.util/get [:map [:foo {:default :bar} keyword?]] :foo))
;;=> nil

Did you check what just mu/get returns?

Yeah, it returns keyword?, so it’s not suprise it doesn’t work. I also tried find:

(malli.util/find [:map [:foo {:default :bar} keyword?]] :foo)
;;=> [:foo {:default :bar} keyword?]

(malli.core/properties (malli.util/find [:map [:foo {:default :bar} keyword?]] :foo))
;;=> Execution error (ExceptionInfo) at malli.core/-exception (core.cljc:138).
;;   :malli.core/invalid-schema

Oh right, and the default property is in the map schema key props

I mean I can get to it using find, but it doesn’t feel quite right. 🙂

ideas most welcome for a better api, currently mu/find or m/entries on the map to iterate all entries.

Good to know, thanks. 👍 I think coercing the map to contain the default values is the right way to go in my case, though.