[Cuis-dev] JSON encoding and decoding

[Mark Volkmann]

On Sun, Jun 16, 2024 at 5:33 PM Mariano Montone via Cuis-dev <
cuis-dev at lists.cuis.st> wrote:

> El 16/6/24 a las 18:52, Mark Volkmann via Cuis-dev escribió:
>
> There are methods to encode and decode JSON in the WebClient package
> inside the WebUtils class. But they seem incomplete and/or broken. For
> example, the class method `#jsonObj:on:` does not handle arbitrary objects
> by using reflection to discover their instance properties. That's a feature
> I want. I suppose I can implement that myself, but this seems like
> something someone most likely already implemented. Is there another package
> for JSON that is recommended?
>
> Yes.
>
> Feature require: 'JSON'.
>

After running that in a Workspace I entered this where dog is variable that
holds an object from my Dog class that has the instance variables id, name,
and breed:

s := Json render: dog

That gives me MessageNotUnderstood: VDog>>jsonWriteOn:.

Why does it expect me to implement that method in my Dog class? I expect it
to just use reflection to get all the instance variables of the object and
build JSON from them.

I really wish it was more common for Smalltalk packages to provide
documentation on their usage and some example code.

-- 
R. Mark Volkmann
Object Computing, Inc.
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