Question about Azure.APIM.PolicyBase Rule and <base /> Element

[mikkelh-SDU]

Hi everyone 👋

I'm running into an issue with the Azure.APIM.PolicyBase rule.

From the documentation, I understand that I need to include the element in every scope of the policy, which I’ve done. However, I’m still getting the following error:

[FAIL] Azure.APIM.PolicyBase (AZR-000371)
| Parameter: infra/main.bicepparam:1:0

| RECOMMEND:
| Consider configuring the base element for any policy element in a section.

| REASON:
| - The parameter 'inputObject' is null.

| HELP:
| - https://azure.github.io/PSRule.Rules.Azure/en/rules/Azure.APIM.PolicyBase/

I'm loading my XML files using loadTextContent('./api-policy.xml'), but I don’t believe that’s the issue, as I’ve also tried passing the policy directly as a string with the same result.

Any insights or suggestions on what might be causing this would be greatly appreciated! 🎉

Thanks in advance!

[BernieWhite]

Hi @mikkelh-SDU Thanks for the question.

I think the problem would be that your policy is missing one or more of the sections inbound, backend, outbound, or on-error.

That's not specifically called out in the documentation, although the example includes it. But that could easily be a point of confusion, so we should add it. #3413

https://github.com/Azure/PSRule.Rules.Azure/blob/main/src/PSRule.Rules.Azure/rules/Azure.APIM.Rule.ps1#L324-L336

---

Try adding the missing sections and inherit them from base. I hope that helps.

[mikkelh-SDU]

Thanks so much for the quick reply — and your suggestion worked perfectly! 🎉

I was indeed missing the section in one of my policies. After adding:

<on-error>
    <base />
</on-error>

…the error went away, and everything is working as expected now.
Thanks again for the support! 🙌 🎉