How do I validate a big decimal value in malli?

Question

I have a variable of data type big decimal. How to validate that in Malli?

Looking at the predicate types in malli, there isn't one for big decimal. https://github.com/metosin/malli#built-in-schemas

So how do can I validate for this?

And what do we use number? for in Malli. Can someone provide an example for this?

akond · Accepted Answer · 2022-08-18T09:58:18.593

3

(require
        '[malli.core :as m]
        '[malli.registry :as mr])
(mr/set-default-registry!
    (merge
        (m/default-schemas)
        {:bigdec? (m/-simple-schema {:type :bigdec?
                                     :pred #(instance? BigDecimal %)})}))
(let [schema [:map [:n :bigdec?]]]
    {:invalid (m/explain schema {:n 1})
     :valid   (m/explain schema {:n (BigDecimal. 1)})})

edited Aug 18 '22 at 09:58

answered Aug 17 '22 at 03:25

akond

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I have a doubt in this. I tried adding this in core. And tried this example in Repl. : (m/explain schema {:n 1}) Got this error : Unable to resolve symbol: schema in this context. How can I resolve this? – MouseNag Aug 17 '22 at 03:54
1

`schema` is this `[:map [:n :bigint?]]` – akond Aug 17 '22 at 04:22
1

Wouldn't be `bigdec?` a better name? – cfrick Aug 18 '22 at 07:07
1

Yes, it would. Fixed it. – akond Aug 18 '22 at 09:58
Can we use this & try to make a similar customized function for long datatype? – MouseNag Sep 07 '22 at 07:19

How do I validate a big decimal value in malli?

1 Answers1