How to use jsonpath to get JSON object?

[DiegoFlop]

I have a JSON file in a git repository.
When I execute a workflow, I get this repository and read the next JSON file

{
    "steps": {
        "test_!": {
            "skip": "false",
            "resources": {
                "requests": {
                    "cpu": "100m",
                    "memory": "512Mi"
                },
                "limits": {
                    "cpu": "200m"
                    "memory": "1024Mi"
                }
            }
        },
        "test_2": {
            "resources": {
                "requests": {
                    "cpu": "100m"
                },
                "limits": {
                    "cpu": "200m",
                    "memory": "512Mi"
                }
            }
        }
    }
}

I'm using "{{= jsonpath(tasks.checkout.outputs.parameters.custom_config, '$.steps.test_1.resources') }}" on a value field of inputs parameters
But I need get resources objecto, however jsonpath function return map[limits:map[cpu:200m memory:1024Mi] requests:map[cpu:100m memory:512Mi]] when I expected "resources": {"requests": {"cpu": "100m","memory": "512Mi"},"limits": {"cpu": "200m""memory": "1024Mi"}} for overwrite container resource with podSpecPatch.

Someone how I can solve this problem?

Thanks

[wesleyscholl]

Please advise if there is a solution for this, thanks.

[agilgur5]

You mean you want to convert the Go map to a JSON string? In 3.4 you can try asStr(v), or in 3.5 you can try string(v) or perhaps toJSON(v)

[jheilgeist]

Note that with 3.4.10, we had to use the Argo-provided core function toJson(v) instead of expr's toJSON(v).

Full example:

apiVersion: argoproj.io/v1alpha1
kind: Workflow
metadata:
  generateName: foobar-wf-
spec:
  entrypoint: entry
  arguments:
    parameters:
      - name: my-config
        value: |
          {
            "my-list": [
              {
                "foo": 1,
                "bar": "value-1"
              },
              {
                "foo": 2,
                "bar": "value-2"
              }
            ]
          }
  templates:
    - name: entry
      steps:
        - - name: loop
            template: just-echo
            arguments:
              parameters:
                - name: message
                  value: "{{item}}"
            withParam: "{{=toJson(jsonpath(workflow.parameters['my-config'], '$.my-list'))}}"
    - name: just-echo
      inputs:
        parameters:
          - name: message
      container:
        image: alpine
        command: ["sh","-c"]
        args: ['echo "{{inputs.parameters.message}}"']

[Joibel]

In 3.6 you can just use jsonpath() thanks to #12909

[agilgur5]

Summarizing for the selected answer:

• 3.4: {{=toJson(jsonpath(...))}} (How to use `jsonpath` to get JSON object? #8930 (reply in thread))
• 3.5: {{=toJSON(jsonpath(...))}} (How to use `jsonpath` to get JSON object? #8930 (reply in thread))
• 3.6: {{=jsonpath(...)}} (How to use `jsonpath` to get JSON object? #8930 (comment))