Fixes #39328 - Add macro for fetching activation_key_names

[sayan3296]

What are the changes introduced in this pull request?

Added a new macro called activation_key_names that, if used correctly, would help to extract the names of activation keys used to register a content host.

If more than one key was used, then the key names are printed in comma-separated values.

Considerations taken when implementing this change?

While we expose subscription_facet and allow rendering registered_at\through and last_checkin, we don't have any macro that exposes the activation key names, used to register a system, and users are demanding the same.

We already have host_subscription_facet macro present in https://github.com/Katello/katello/blob/master/app/lib/katello/concerns/base_template_scope_extensions.rb#L316-L318 i.e.

      def host_subscription_facet(host)
        host.subscription_facet
      end

We needed to simply do host_subscription_facet(host)&.activation_keys&.map(&:name) to get the activation key names associated with a registered content host.

What are the testing steps for this pull request?

• Apply the changes from this PR on a centos9-katello-devel env.
• Register a system with that katello server , using an activation key.
• Clone the last_checking report template in UI, to a new name, and make it look something like this:

<%- include_unknown_search = input('Include unknown') == 'true' ? ' or null? last_checkin' : '' %>
<%- search += "and #{input('Host filter')}" if input('Host filter').present? -%>
<%- report_headers('Name', 'IP', 'IPv6', 'Last Checkin', 'Registered through', 'AK') -%>
<%- load_hosts(search: search, preload: [ :subscription_facet, :interfaces ]).each_record do |host| -%>
<%-   report_row(
        'Name': host.name,
        'IP': host.ip,
        'IPv6': host.ip6,
        'Last Checkin': last_checkin(host).to_s,
        'Registered through': registered_through(host),
        'AK': activation_key_names(host),
      ) -%>
<%- end -%>
<%= report_render order: 'Last Checkin' -%>

( make sure that you don't have this line there <%- search = "(last_checkin < \"#{input('Interval')} ago\"#{include_unknown_search})" -%> )

• Now try doing either a preview of this template or else simply generate a csv\html\json report to see how it behaves.

I would expect the AK fields to get populated with right activation key names.

Summary by CodeRabbit

• New Features
  • Templates can now access activation key names for hosts, allowing template authors to reference host activation keys during configuration and deployment.
  • Safely handles hosts without activation keys by returning an empty result, avoiding errors when keys are absent.

[coderabbitai]

No actionable comments were generated in the recent review. 🎉

ℹ️ Recent review info

⚙️ Run configuration

Configuration used: Organization UI

Review profile: CHILL

Plan: Pro

Run ID: e6641695-a5e4-4197-a953-ba69bf0d16bf

📥 Commits

Reviewing files that changed from the base of the PR and between df1275f and 6ce8c26.

📒 Files selected for processing (1)

• app/lib/katello/concerns/base_template_scope_extensions.rb

💤 Files with no reviewable changes (1)

• app/lib/katello/concerns/base_template_scope_extensions.rb

---

📝 Walkthrough

Walkthrough

Adds activation_key_names(host) to BaseTemplateScopeExtensions; the Apipie-documented method returns a host's activation key names via host_subscription_facet(host).activation_key_names or [] when unavailable.

Changes

Activation Key Names Extension

Layer / File(s)	Summary
Activation key names retrieval method app/lib/katello/concerns/base_template_scope_extensions.rb	Adds activation_key_names(host) instance method with Apipie documentation that safely retrieves activation keys from a host's subscription facet, defaulting to an empty array when unavailable.

Estimated code review effort

🎯 1 (Trivial) | ⏱️ ~3 minutes

Suggested reviewers

• nofaralfasi
• jeremylenz

🚥 Pre-merge checks | ✅ 4 | ❌ 1

❌ Failed checks (1 warning)

Check name	Status	Explanation	Resolution
Docstring Coverage	⚠️ Warning	Docstring coverage is 0.00% which is insufficient. The required threshold is 80.00%.	Write docstrings for the functions missing them to satisfy the coverage threshold.

✅ Passed checks (4 passed)

Check name	Status	Explanation
Description Check	✅ Passed	Check skipped - CodeRabbit’s high-level summary is enabled.
Title check	✅ Passed	The title accurately describes the main change: adding a new template macro/method for fetching activation key names to fix issue #39328.
Linked Issues check	✅ Passed	Check skipped because no linked issues were found for this pull request.
Out of Scope Changes check	✅ Passed	Check skipped because no linked issues were found for this pull request.

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✨ Finishing Touches

🧪 Generate unit tests (beta)

• Create PR with unit tests

---

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[jturel]

Works well, thanks Sayan