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### Overall Assessment The function's intent is immediately obvious, which is a real strength — nobody will misread what it returns. Its two weaknesses are both structural rather than cosmetic: it issues one database round trip per user, and it raises an unhandled exception the first time an id has no matching row. ### Prioritized Recommendations 1. Replace the per-id query with a single `IN` query to eliminate the N+1 pattern. 2. Decide explicitly what should happen when a user id has no row
Principal engineer code review
Reviews a snippet or diff across correctness, security, performance, readability, idiom and error handling, then returns prioritized fixes with before/after code and a rationale for each.
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