(logic/is nil schema (fn [s] (s "format")))
or
(logic/pred schema (fn [s] (not (contains? s "format"))))
clumsy - but works
still interested to hear what other people think of this approach...
Jules
On Wednesday, 30 September 2020 at 17:15:42 UTC+1 Jules wrote:
> Guys,
>
> I recently wrote some Clojure to take a JSON Schema and corresponding JSON
> document and produce a JSON document in another JSON "dialect".
>
> Then I realised that I needed to write the reverse transformation.
>
> I've been wondering how I might capture the relationship between the two
> JSON dialects in such a way as to be able to travel backwards and forwards
> between them using the same code,
>
> A long time ago I wrote a lot of PROLOG, so I thought I would have a look
> at core.logic.
>
> I managed some limited success using 'featurep' to inspect schema nodes
> for e.g. {"type" "string"} and then {"type" "string" "format" "date-time"}
> but now my date-times are also matching my string code :-( - I tried using
> {"type" "string" "format' nil} to match non-date-time strings but no joy -
> I really need something like 'non-featurec'...
>
> core.logic seems to be very quiet. Should I press on - in which case I'd
> be interested to hear of any solutions that folks have come up with for
> implementing mutually exclusive sets of 'features' - or should I look for
> another solution - in which case can anyone suggest anything ?
>
> I find the idea of using core.logic to do bi-directional JSON doc
> transformations really appealing - what do others think ?
>
>
> Jules
>
>
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