fix: create new record from belongs_to associations

[Paul-Bob]

Description

via_resource_id: resource.record.to_param when resource.record is not a persistent yet to_param will return nil and that's fine. But in case you use prefix_id or some other ID manipulation it will break if the attributes used on the manipulation are blank.

Fixes #2045

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works

Screenshots

Manual review steps

1. Step 1
2. Step 2

Manual reviewer: please leave a comment with output from the test if that's the case.

[codeclimate]

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[adrianthedev]

Can you please ccheck searchable as well? And add proper tests to cover these scenarios?

[github-actions]

This PR has been merged into main. The functionality will be available in the next release.

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