Given a Malli map schema like [:map [:key {:optional true} :int]], how do I get at the properties assigned the keyword :key in the map when writing a walker? In this example, these are {:optional true}.
As you can see in the below example the walker visits all the "values" of the map, in this case just the :int schema, and then out to the :map schema. Is there any way to get to the inbetween step, the "schema" and properties of :key?
(malli/walk
[:map [:key {:optional true} :int]]
(fn [schema path children options]
(println "Schema:" schema)
(println "Path:" path)
(println "Children:" children)
(println "Options:" options)
(println "Properties:" (malli/properties schema))
(println))) => nil
;; Schema: :int
;; Path: [:key]
;; Children: nil
;; Options: nil
;; Properties: nil
;;
;; Schema: [:map [:key {:optional true} :int]]
;; Path: []
;; Children: [[:key {:optional true} nil]]
;; Options: nil
;; Properties: nil
You need to pass the option :malli.core/walk-entry-vals to the walker function.
(malli/walk
[:map [:key {:optional true} :int]]
(fn [schema path children options]
(println "Schema:" schema)
(println "Path:" path)
(println "Children:" children)
(println "Options:" options)
(println "Properties:" (malli/properties schema))
(println))
{::malli/walk-entry-vals true})
;; Schema: :int
;; Path: [:key]
;; Children: nil
;; Options: #:malli.core{:walk-entry-vals true}
;; Properties: nil
;;
;; Schema: [:malli.core/val {:optional true} :int]
;; Path: [:key]
;; Children: (nil)
;; Options: #:malli.core{:walk-entry-vals true}
;; Properties: {:optional true}
;;
;; Schema: [:map [:key {:optional true} :int]]
;; Path: []
;; Children: [[:key {:optional true} nil]]
;; Options: #:malli.core{:walk-entry-vals true}
;; Properties: nil