Skip missing books in IA carousels

[MahdiiFakhfakh]

Closes #12740

fix

Skips missing entries returned from Archive carousel data so one bad/missing item does not break the IA carousel rendering.

Technical

get_ia_carousel_books() already skipped "error" entries from lending.get_available(), but did not skip missing/falsey entries like None.

This PR updates the filtering so only real book objects are passed to format_book_data().

Testing

docker compose run --rm home pytest openlibrary/plugins/openlibrary/tests/test_home.py -q
docker compose run --rm home ruff check openlibrary/plugins/openlibrary/home.py openlibrary/plugins/openlibrary/tests/test_home.py

Screenshot

N/A. This is a backend carousel data handling fix.

Stakeholders

@RayBB @mekarpeles @seabelis

[mekarpeles]

Thanks for the pull request!

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A reviewer must first be assigned. There are currently 17 open PRs of equal or higher priority ahead of yours.

PR triage checklist (maintainers / Pam)

• PR description — not empty; explains what the change does and how to verify it
• References an issue — PR body contains a #NNN reference
  • Linked issue is triaged — has a Priority: * label (not just Needs: Triage)
  • Linked issue is assigned — has at least one assignee
• Commit history clean — no WIP/fixup/conflict noise; commit messages are meaningful
• CI passing — no failing check-runs
• Test cases present — if the change touches substantive logic, test coverage exists or is explained
• Proof of testing — PR body includes a description of what was tested, a screenshot, or a video

Note

This comment was automatically generated by Pam, Open Library's Project AI Manager, on behalf of @mekarpeles. Pam is designed to provide status visibility, perform basic project management functions and relevant codebase research, and provide actionable feedback so contributors aren't left waiting.

[Copilot]

Pull request overview

Fixes IA carousel rendering on the home page by filtering out missing/falsey entries returned from lending.get_available() so a single bad item doesn’t break formatting.

Changes:

• Filter IA carousel results to skip None/falsey entries (in addition to 'error') before calling format_book_data().
• Add a regression test ensuring missing books are skipped and valid books are still formatted.

Reviewed changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
openlibrary/plugins/openlibrary/home.py	Filters IA carousel book list to exclude falsey entries before formatting.
openlibrary/plugins/openlibrary/tests/test_home.py	Adds a unit test covering the “skip missing books” behavior.