Claudio Ortolina
33 lines
1008 B
Markdown
33 lines
1008 B
Markdown
---
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id: ML-99
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title: Raw SQL with string concatenation in ScrobbleRules
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status: Done
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assignee: []
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created_date: '2026-04-20 08:58'
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labels: []
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dependencies: []
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references:
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- 'https://github.com/cloud8421/music_library/issues/75'
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priority: medium
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---
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## Description
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<!-- SECTION:DESCRIPTION:BEGIN -->
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_GitHub: created 2026-02-17 · updated 2026-03-05 · closed 2026-03-05_
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## Priority: Medium
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## Description
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`lib/music_library/scrobble_rules.ex` — Four `apply_all_*_rules` functions (lines 398-598) build CASE/WHEN and WHERE IN clauses via string concatenation and execute with `Repo.query/2`. Values are properly parameterized, but the SQL structure (placeholders, CASE clauses) is built via string interpolation, making it harder to maintain and test than Ecto query builders.
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## Expected behavior
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Use Ecto query builders or a safer SQL construction approach to improve maintainability and testability.
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## Source
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From technical debt audit (2026-02-17), item #2.
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<!-- SECTION:DESCRIPTION:END -->
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