How to define object parameters with complex validation

[cy-ddg]

I am trying to define parameters that use the full power of the available JSONSchema validations available in the CNAB spec, but so far I have only middling success.

The following parameter definition

parameters:
- name: values
  type: object
  properties:
    replicaCount:
      $id: '#/properties/replicaCount'
      type: integer

builds successfully but trying to set the parameter value on install like this

parameters:
- name: values
  source:
    value: '{"replicaCount": 3}'

results in this error on running the install command:

Error: invalid parameters: unable to convert parameter's values value {"replicaCount": 3} to the destination parameter type object: invalid definition

A parameter definition like

parameters:
- name: values
  type: object
  additionalProperties:
    type: string

does not even build and fails with the error:

Error: 1 error occurred:
	* encountered error while validating parameter values: unable to load schema: json: unsupported type: map[interface {}]interface {}

So my question is this: Am I doing something wrong or is this a limitation of the current implementation?

[vdice]

Thanks for bringing this to our attention @cy-ddg . Your approach above looks sound. This definitely appears to be a bug in Porter.

[vdice]

We can close this once the cnab-go fix (or similar) is integrated into Porter.

[vdice]

I can confirm that this issue is fixed as of ed52bc1 on the v1 branch.

[carolynvs]

I am working on getting a build out of our v1 prerelease so that people can try this out. I'm going to close this issue since we have a fix merged, and will send out an announcement when I have a v1 build ready for people to try out.

Make sure to join our mailing list or slack to know when a build is ready to test.

[carolynvs]

This has been fixed in the v1.0.0-alpha.2 prerelease. Please give it a try and let us know if you run into any problems!

[cy-ddg]

The new version looks very good! The example above is working now. I've found one more problem though when trying to define an array parameter with a specific schema for the items:

parameters:
  - name: values
    type: array
    items:
      type: integer

This builds successfully but trying to install it with the following parameters:

{
  "parameters": [
    {
      "name": "values",
      "source": {
        "value": "[]"
      }
    }
  ]
}

I get the following error message:

Error: 1 error occurred:
	* encountered error while validating parameter values: unable to load schema: json: unsupported type: map[interface {}]interface {}


Error: 1 error occurred:
	* container exit code: 1, message: <nil>

But besides that it is working pretty well. Good job!

[carolynvs]

@cy-ddg I've made a new issue to track the bug you reported. 👍

#1733