fix: handle foreign key toward non primary key with virtual field

[GuillaumeCisco]

Pull Request checklist:

• Write an explicit title for the Pull Request, following Conventional Commits specification
• Create automatic tests
• Test manually the implemented changes
• Review my own code (indentation, syntax, style, simplicity, readability)
• Wonder if you can improve the existing code

[codeclimate]

Code Climate has analyzed commit 7a8cc0d and detected 0 issues on this pull request.

The test coverage on the diff in this pull request is 80.0% (60% is the threshold).

This pull request will bring the total coverage in the repository to 55.8% (0.0% change).

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