Rename\transform a key\selector

[electriquo]

Is it possible to rename\transform a key\selector? if so, how?

E.g., having the following JSON

{ "foo": "spam" }

How can foo be changed to bar to get?

{ "bar": "spam" }

[TomWright]

There isn't a specific rename feature but you could do something like this:

$ echo '{"foo":"spam"}' > file.json
dasel put string -f file.json '.bar' $(dasel -f file.json --plain '.foo')
dasel delete -f file.json '.foo'
~ [] $ cat file.json
{
  "bar": "spam"
}

[myersjustinc]

I'd love to see some sort of feature along these lines as well. I ran into this today and was hoping to use dasel for it since I learned about it yesterday.

I couldn't figure it out from the docs, and rather than put and delete with a temporary file as above (since I saw that solution after the fact), I ended up piping through both jq's map (one of my favorite aspects of that syntax) for the renaming and csvkit's in2csv for the format conversion:

$ echo '[["[email protected]","Foo","Bar"],["[email protected]","Ham","and Eggs"]]' | \
    jq 'map({"Email": .[0], "First name": .[1], "Last name": .[2]})' | \
    in2csv --format json
Email,First name,Last name
[email protected],Foo,Bar
[email protected],Ham,and Eggs

[TomWright]

The correct solution right now would be to pipe a put and a delete together, but maybe a map command may be in order.

[TomWright]

Hey @myersjustinc,

With dasel v2 (still in development but in a good place) you can do this with:

echo '[["[email protected]","Foo","Bar"],["[email protected]","Ham","and Eggs"]]' 
| dasel -r json -w csv 'all().mapOf(email,[0],first,[1],last,[2]).merge()'
email,first,last
[email protected],Foo,Bar
[email protected],Ham,and Eggs

If you're interested in using the v2 development version you can find the docs here: https://daseldocs.tomwright.me/v/v2/