How do I set up an action widget to add to a nested JSON tiddler WITHOUT overwriting it entirely?

[Scott_Sauyet]

@Greyed

…but this ugly ‘sledgehammer’ method forcibly overwrites the whole text field of the JSON tid – which in clumsy hands (like mine!) has very high potential to cause the complete loss of its data.

It’s easy to forget that JSON is a string format. While it is meant to carry a payload of a simple object, array, or primitive value, it is not those values; it is a string that can be deserialized into those values. So anything that is going to update the payload in that nested value will necessarily create a new string.

I don’t know the TW JSON tools well enough to offer alternate ways to do what you do here, but any tools that do exist will still have to replace the string value.

@Greyed

It also squishes the human-readable “pretty” formatting into a single, compact line that’s terrible to read or hand-correct.

That is solvable:

<$action-setfield $tiddler="SomeTid" $field="text" $value={{{ 
    [[SomeTid]get[text]jsonextract[]] 
    +[jsonset:object[sale3]]
    +[jsonset[sale3],[discount],[60]]
    +[jsonset[sale3],[price],[5.99]]
}}} />

AFAICT, there is no way to get the result back into a prettified format using wikitext. Even if we could parse it into a JS object, the stringify operator doesn’t seem to offer an indent parameter.

Edit:

Found it, it’s part of the format Operator

<$action-setfield $tiddler="SomeTid" $field="text" $value={{{ 
    [[SomeTid]get[text]jsonextract[]] 
    +[jsonset:object[sale3]]
    +[jsonset[sale3],[discount],[60]]
    +[jsonset[sale3],[price],[5.99]]
    +[format:json[4]]
}}} />