[Pharo-users] Multiple NeoJSON mappings for the same domain object

Esteban Maringolo emaringolo at gmail.com
Tue Feb 12 20:58:04 EST 2019

Meanwhile I found another approach to solve this in the context of a

E.g. see #addRuleToEncode:to:using: in.

Has a separate mapper for encoding and decoding, depending on the endpoint:


Esteban A. Maringolo

El mar., 12 feb. 2019 a las 19:34, Esteban Maringolo
(<emaringolo at gmail.com>) escribió:
> Hi all, Sven, :)
> I'm working on a domain model that will have different JSON
> representations for the same domain objects, so depending on the
> context it will return one representation or another.
> In the past to solve the multiple representations, what I did was to
> build "helper" methods that added the mappings to the mapper.
> So the process was like:
> 1. instantiate the mapper
> 2. call a #neoJsonSimple: mapper
> 3. configure the mapper by calling other mapping defining methods
> 4. convert the object to a JSON string.
> If I wanted an "extended" representation, in the step 2 I would call
> #neoJsonExtended: instead.
> But I find this "too manual" to scale.
> So... is there a better, ¿canonical?, way to achieve this?
> Thanks!
> ps: By now it will be only object -> JSON (so NeoJSONWriter), but in
> the future I might need to instantiate objects back from JSON, so the
> mappings should be for both mappers.
> Esteban A. Maringolo

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