Cannot use JSONPath to get keys

[janwytze]

What is the current bug behavior?

I cannot use JSONPath to receive object keys.

Steps to reproduce

This is the object I try to get keys from:

{
  "id": 1,
  "attachments": {
    "key1": {
      "created_at": "2023-04-18T11:22:36Z"
    },
    "key2": {
      "created_at": "2023-04-18T11:22:36Z"
    },
    "key3": {
      "created_at": "2023-04-18T11:22:36Z"
    }
  }
}

The following JSONPath queries do not work:

• $.attachments.keys()
• $.attachments.*~
• $.attachments.*.@

What is the expected correct behavior?

I would expect one of the above to work. The result should be the following:

[
"key1",
"key2",
"key3"
]

Execution context

• Hurl Version (hurl --version):

hurl 2.0.1 libcurl/7.81.0 OpenSSL/3.0.2 zlib/1.2.11 brotli/1.0.9 zstd/1.4.8 libidn2/2.3.2 libssh/0.9.6/openssl/zlib nghttp2/1.43.0
Features (libcurl):  alt-svc AsynchDNS brotli HSTS HTTP2 IDN IPv6 Largefile libz NTLM NTLM_WB SPNEGO SSL TLS-SRP UnixSockets zstd
Features (built-in): brotli

• Operating system and version: Ubuntu 22.04

[fabricereix]

Hi @janwytze,
Indeed this is currently not supported in Hurl.
We are not sure about this extension not present in the "official" spec https://goessner.net/articles/JsonPath/.

We might add a filter instead, that should be more readable and reusable.
with your example

jsonpath "$.attachments" keys nth 0 == "key1"
jsonpath "$.attachments" keys nth 1 == "key2"
jsonpath "$.attachments" keys nth 2 == "key3"

[janwytze]

Thanks for the response! I can right now solve it by using a count instead