Request for %set_json_keys function and json data writing capabilities

Question

Hi,

The json-preprocessor has these really useful builtin functions : 

• %get_json_keys
• %get_json_type
•  %json_key_exists
•  %size

Could you consider adding 

%set_json_key ?

As far I know we are not able to write to a json.

I guess it's a difficult feature and maybe out of the scope... I don't know

Being able of doing :

!$diagram={

"version":"",

"data":[]

}

$diagram.version = %version()

$diagram.data[0] = $some_variable

opens a new world lol.

Thanks.

Comments

Hello K., and all,

Just FYI, here are some pseudo-similar requests here:

• https://forum.plantuml.net/15436/allow-update-json-object-or-array-value
• https://github.com/plantuml/plantuml/issues/328
• https://forum.plantuml.net/17474/modify-json-variables-in-preprocessor

Regards.
Th.

---

Thanks.
It seams that its an OLD request lol.
Do you know it its faesable ? Is it considered by the dev team

---

Hello K, and all,

See also new discussion here:

• https://github.com/plantuml/plantuml/discussions/1733

Regards,
Th.

Answer 1

Hello K., and all,

Available from last snapshot (~v1.2024.5beta1):

• https://github.com/plantuml/plantuml/releases/tag/snapshot

You can now use:

• %str2json
• %json_add
• %json_remove

Then:

• Could you test to confirm proper operation?
• or feel free to share your feedback...

---

From:

• https://github.com/plantuml/plantuml/pull/1742

See also:

• https://github.com/plantuml/plantuml/discussions/1733
• https://forum.plantuml.net/15436/allow-update-json-object-or-array-value
• https://forum.plantuml.net/17474/modify-json-variables-in-preprocessor
• https://forum.plantuml.net/18418/request-%25set_json_keys-function-json-writing-capabilities

---

Regards,
Th.

Comments

GREAT  !!!

I will test it this week.