⚡ Bolt: Resolve N+1 query in grievance escalation loop#913
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Added `joinedload(Grievance.jurisdiction)` to the `_get_grievances_for_evaluation` query in the `EscalationEngine`. This prevents a separate database query from being executed for every overdue grievance during periodic evaluations.
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🙏 Thank you for your contribution, @RohanExploit!PR Details:
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No actionable comments were generated in the recent review. 🎉 ℹ️ Recent review info⚙️ Run configurationConfiguration used: defaults Review profile: CHILL Plan: Pro Run ID: 📒 Files selected for processing (2)
📝 WalkthroughWalkthroughThe escalation evaluation query now eagerly loads each grievance’s jurisdiction to avoid per-grievance database queries. Documentation records the N+1 issue and the recommended eager-loading approach. ChangesEscalation query optimization
Estimated code review effort: 2 (Simple) | ~10 minutes Suggested reviewers: 🚥 Pre-merge checks | ✅ 5✅ Passed checks (5 passed)
✨ Finishing Touches📝 Generate docstrings
🧪 Generate unit tests (beta)
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💡 What:
Added
joinedload(Grievance.jurisdiction)to the_get_grievances_for_evaluationSQLAlchemy query inbackend/escalation_engine.py.🎯 Why:
During the periodic evaluation of overdue grievances (
evaluate_and_escalate_grievances), the engine loops over all overdue grievances and accessesgrievance.jurisdiction.levelin_should_escalate. Without eager loading, this resulted in a classic N+1 query problem, firing an additional database query for every single overdue grievance, which is a major bottleneck as the database grows.📊 Impact:
Reduces the number of database queries in the evaluation loop from N+1 (where N is the number of overdue grievances) to exactly 1. This significantly improves the execution speed of the periodic cron job and reduces database load.
🔬 Measurement:
Enable SQLAlchemy query logging (e.g.,
echo=Trueon engine creation) and runevaluate_and_escalate_grievances. Verify that only a single SQL query is executed instead of one large query followed by many smaller ones fetching jurisdictions. Tests continue to pass.PR created automatically by Jules for task 1610573002636816145 started by @RohanExploit
Summary by cubic
Eliminates an N+1 query in the grievance escalation loop by eager-loading jurisdictions via
joinedload(Grievance.jurisdiction)in_get_grievances_for_evaluation. This reduces DB queries from N+1 to 1 and speeds up the periodic evaluation job while lowering database load.Written for commit 90922f2. Summary will update on new commits.
Summary by CodeRabbit
Performance
Documentation