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order near searches by distance instead of importance

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This commit is contained in:
Sarah Hoffmann
2023-11-26 16:48:04 +01:00
parent 8fcc2bb7f5
commit 580a7b032f
2 changed files with 14 additions and 13 deletions
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22
nominatim/api/search/db_searches.py
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@@ -66,7 +66,7 @@ def _select_placex(t: SaFromClause) -> SaSelect:
t.c.class_, t.c.type,
t.c.address, t.c.extratags,
t.c.housenumber, t.c.postcode, t.c.country_code,
t.c.importance, t.c.wikipedia,
t.c.wikipedia,
t.c.parent_place_id, t.c.rank_address, t.c.rank_search,
t.c.linked_place_id, t.c.admin_level,
t.c.centroid,
@@ -158,7 +158,8 @@ async def _get_placex_housenumbers(conn: SearchConnection,
place_ids: List[int],
details: SearchDetails) -> AsyncIterator[nres.SearchResult]:
t = conn.t.placex
sql = _select_placex(t).where(t.c.place_id.in_(place_ids))
sql = _select_placex(t).add_columns(t.c.importance)\
.where(t.c.place_id.in_(place_ids))
if details.geometry_output:
sql = _add_geometry_columns(sql, t.c.geometry, details)
@@ -307,7 +308,8 @@ class NearSearch(AbstractSearch):
.group_by(table.c.place_id).subquery()
t = conn.t.placex
sql = _select_placex(t).join(inner, inner.c.place_id == t.c.place_id)\
sql = _select_placex(t).add_columns((-inner.c.dist).label('importance'))\
.join(inner, inner.c.place_id == t.c.place_id)\
.order_by(inner.c.dist)
sql = sql.where(no_index(t.c.rank_address).between(MIN_RANK_PARAM, MAX_RANK_PARAM))
@@ -350,6 +352,8 @@ class PoiSearch(AbstractSearch):
# simply search in placex table
def _base_query() -> SaSelect:
return _select_placex(t) \
.add_columns((-t.c.centroid.ST_Distance(NEAR_PARAM))
.label('importance'))\
.where(t.c.linked_place_id == None) \
.where(t.c.geometry.ST_DWithin(NEAR_PARAM, NEAR_RADIUS_PARAM)) \
.order_by(t.c.centroid.ST_Distance(NEAR_PARAM)) \
@@ -378,6 +382,7 @@ class PoiSearch(AbstractSearch):
table = await conn.get_class_table(*category)
if table is not None:
sql = _select_placex(t)\
.add_columns(t.c.importance)\
.join(table, t.c.place_id == table.c.place_id)\
.where(t.c.class_ == category[0])\
.where(t.c.type == category[1])
@@ -423,6 +428,7 @@ class CountrySearch(AbstractSearch):
ccodes = self.countries.values
sql = _select_placex(t)\
.add_columns(t.c.importance)\
.where(t.c.country_code.in_(ccodes))\
.where(t.c.rank_address == 4)
@@ -599,15 +605,7 @@ class PlaceSearch(AbstractSearch):
tsearch = conn.t.search_name
sql: SaLambdaSelect = sa.lambda_stmt(lambda:
sa.select(t.c.place_id, t.c.osm_type, t.c.osm_id, t.c.name,
t.c.class_, t.c.type,
t.c.address, t.c.extratags, t.c.admin_level,
t.c.housenumber, t.c.postcode, t.c.country_code,
t.c.wikipedia,
t.c.parent_place_id, t.c.rank_address, t.c.rank_search,
t.c.centroid,
t.c.geometry.ST_Expand(0).label('bbox'))
.where(t.c.place_id == tsearch.c.place_id))
_select_placex(t).where(t.c.place_id == tsearch.c.place_id))
if details.geometry_output:

5
nominatim/api/search/geocoder.py
View File

@@ -134,7 +134,10 @@ class ForwardGeocoder:
return
for result in results:
if not result.display_name:
# Negative importance indicates ordering by distance, which is
# more important than word matching.
if not result.display_name\
or (result.importance is not None and result.importance < 0):
continue
distance = 0.0
norm = self.query_analyzer.normalize_text(result.display_name)