4.0.0 breaks jsonpath with filter

[RELAXccc]

What is the current bug behavior?

My script that works in hurl version 3.0.1 throws now:
"""
error: Unrenderable variable
--> client_setup/get_clientId.hurl:11:60
|
11 | GET {{url}}/auth/clients/{{client_id}}/client-secret
| ^^^^^^^^^ variable <client_id> with value [THIS_IS_AN_ID] can not be rendered
|
"""

Steps to reproduce

add
"""
[Captures]
client_id: jsonpath "$[?(@.name=='{{my_client}}')].id"
"""
to a step that returns an array with multiple objects that contain id and name

this should return the id of client "my_client" as follows:

THIS_IS_AN_ID

returns as follows:

[THIS_IS_AN_ID]

##maybe a solution

I think the fix for #1469 could have introduced this error.

I can't find any way to make my configurations work with version higher than 4.0.0

[jcamiel]

Hi @RELAXccc

Starting with Hurl 4.0.0, we've slighty changed JSONPath evaluation to be more correct. When your JSONPath contains a filter (like ?(@.name=='{{my_client}}')), the Hurl queries will return a collection. You can have more details about this change here https://hurl.dev/blog/2023/06/30/announcing-hurl-4.0.0.html#jsonpath-change

In your case, you can extract an item from the collection with nth filter:

....
[Captures]
client_id: jsonpath "$[?(@.name=='{{my_client}}')].id" nth 0

GET {{url}}/auth/clients/{{client_id}}/client-secret

We have done this change to deal with edge cases and to be more consistant with JSONPath spec

[RELAXccc]

Oh sorry that I did not read these changelogs. thank you a lot for the fast answer, you are helping me a lot rn