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sort housenumber parents by accuracy first

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Sorting them by presence of housenumber only will give an undue
preference to results with a housenumber while disregarding other
factors like matching postcodes.
This commit is contained in:
Sarah Hoffmann
2025-07-07 12:06:06 +02:00
parent cecdbeb7cf
commit 970d81fb27
1 changed files with 7 additions and 3 deletions
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10
src/nominatim_api/search/db_searches/address_search.py
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@@ -296,11 +296,15 @@ class AddressSearch(base.AbstractSearch):
interpol_sql.label('interpol_hnr'),
tiger_sql.label('tiger_hnr')).subquery('unsort')
sql = sa.select(unsort)\
.order_by(sa.case((unsort.c.placex_hnr != None, 1),
.order_by(unsort.c.accuracy +
sa.case((unsort.c.placex_hnr != None, 0),
(unsort.c.interpol_hnr != None, 0),
(unsort.c.tiger_hnr != None, 0),
else_=1),
sa.case((unsort.c.placex_hnr != None, 1),
(unsort.c.interpol_hnr != None, 2),
(unsort.c.tiger_hnr != None, 3),
else_=4),
unsort.c.accuracy)
else_=4))
sql = sql.limit(LIMIT_PARAM)