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feat(ofsted): fall back to ungraded inspection outcome for school grade
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Ungraded (Section 8) inspections don't assign a fresh grade — the export
only gives free text like "School remains Good". Parse that text into a
grade (remains Outstanding -> 1, remains Good -> 2, else null) and use it
as a last-resort fallback when no graded overall effectiveness exists.

Also retain schools that have only an ungraded inspection (no graded date)
by coalescing the inspection date, so ~8.5k previously-dropped schools now
carry a grade.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>
This commit is contained in:
Tudor
2026-07-01 21:44:01 +01:00
co-authored by Claude Opus 4.8
parent eae62a4b42
commit 2332ee6347
8 changed files with 61 additions and 4 deletions
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backend/data_loader.py
+2 -1
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@@ -204,7 +204,8 @@ _MAIN_QUERY = text("""
LEFT JOIN (
SELECT DISTINCT ON (urn)
urn,
overall_effectiveness AS ofsted_grade,
-- Fall back to the ungraded-inspection grade when no graded grade exists.
COALESCE(overall_effectiveness, ungraded_grade) AS ofsted_grade,
inspection_date AS ofsted_date,
framework AS ofsted_framework
FROM marts.fact_ofsted_inspection