2021-11-11 malli | Clojure Slack Archive

malli 2021-11-11

Yehonathan Sharvit 2021-11-11T07:07:30.075400Z

Is there a way to create a custom Malli tag that will allow me to write:

[:record
   [:user-id :string]
   [:num-of-purchases :int]]

And it would be the same as:

[:and
 [:map-of :keyword :any]
 [:map
   [:user-id :string]
   [:num-of-purchases :int]]

I need this because for the moment JSON decoder doesn't convert :map key strings to keywords https://github.com/metosin/malli/issues/568

Ben Sless 2021-11-11T07:15:57.075600Z

Why not add your own transformer?

juhoteperi 2021-11-11T08:46:22.075800Z

@viebel you could use the json-transformer version I posted on the issue. (You might want to combine with :map-of code from the Malli.transform version)

juhoteperi 2021-11-11T08:46:47.076Z

But yeah if you create your own registry, you could define :record as :map-of + :map

Yehonathan Sharvit 2021-11-11T09:56:41.076200Z

How it would look like?

Nikolas Pafitis 2021-11-11T20:44:30.076700Z

Does generate cache the generator?

respatialized 2021-11-11T21:03:51.076800Z

mg/generator is what you're looking for I think

Nikolas Pafitis 2021-11-11T21:15:28.077Z

Yes but if i skip the mg/generator, generate will create a generator, is that generator cached?

ikitommi 2021-11-18T18:10:13.097600Z

not yet, but in few mins it does - https://github.com/metosin/malli/pull/575/files

ikitommi 2021-11-18T18:14:14.097800Z

mg/generator is still bit faster, as there is no cache lookup. Caching is done on Schema instance level, so calling generate with just hiccup effectively bypasses the cache.

ikitommi 2021-11-18T18:18:46.098400Z

merged, so generators are also cached by default (with the Schema instance):

(def schema
  (m/schema
    [:map
     [:x boolean?]
     [:y {:optional true} int?]
     [:z [:map
          [:x boolean?]
          [:y {:optional true} int?]]]]))

(comment
  ;; 119µs
  ;; 16µs (cache generator)
  (p/bench (mg/generate schema)))

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malli 2021-11-11