no longer accept None in result maker functions

src/nominatim_api/lookup.py

@@ -19,7 +19,7 @@ from .logging import log
 from . import types as ntyp
 from . import results as nres
 
-RowFunc = Callable[[Optional[SaRow], Type[nres.BaseResultT]], Optional[nres.BaseResultT]]
+RowFunc = Callable[[SaRow, Type[nres.BaseResultT]], nres.BaseResultT]
 
 GEOMETRY_TYPE_MAP = {
     'POINT': 'ST_Point',
@@ -74,7 +74,6 @@ class LookupCollector:
 
         for row in await conn.execute(sql):
             result = row_func(row, nres.SearchResult)
-            assert result is not None
             if hasattr(row, 'bbox'):
                 result.bbox = ntyp.Bbox.from_wkb(row.bbox)
 
@@ -116,7 +115,6 @@ class DetailedCollector:
 
         for row in await conn.execute(sql):
             self.result = row_func(row, nres.DetailedResult)
-            assert self.result is not None
             # add missing details
             if 'type' in self.result.geometry:
                 self.result.geometry['type'] = \

src/nominatim_api/results.py

@@ -310,15 +310,11 @@ def _filter_geometries(row: SaRow) -> Dict[str, str]:
             if k.startswith('geometry_')}
 
 
-def create_from_placex_row(row: Optional[SaRow],
+def create_from_placex_row(row: SaRow, class_type: Type[BaseResultT]) -> BaseResultT:
-                           class_type: Type[BaseResultT]) -> Optional[BaseResultT]:
     """ Construct a new result and add the data from the result row
         from the placex table. 'class_type' defines the type of result
         to return. Returns None if the row is None.
     """
-    if row is None:
-        return None
-
     return class_type(source_table=SourceTable.PLACEX,
                       place_id=row.place_id,
                       osm_object=(row.osm_type, row.osm_id),
@@ -340,8 +336,7 @@ def create_from_placex_row(row: Optional[SaRow],
                       geometry=_filter_geometries(row))
 
 
-def create_from_osmline_row(row: Optional[SaRow],
+def create_from_osmline_row(row: SaRow, class_type: Type[BaseResultT]) -> BaseResultT:
-                            class_type: Type[BaseResultT]) -> Optional[BaseResultT]:
     """ Construct a new result and add the data from the result row
         from the address interpolation table osmline. 'class_type' defines
         the type of result to return. Returns None if the row is None.
@@ -349,9 +344,6 @@ def create_from_osmline_row(row: Optional[SaRow],
         If the row contains a housenumber, then the housenumber is filled out.
         Otherwise the result contains the interpolation information in extratags.
     """
-    if row is None:
-        return None
-
     hnr = getattr(row, 'housenumber', None)
 
     res = class_type(source_table=SourceTable.OSMLINE,
@@ -375,10 +367,10 @@ def create_from_osmline_row(row: Optional[SaRow],
     return res
 
 
-def create_from_tiger_row(row: Optional[SaRow],
+def create_from_tiger_row(row: SaRow,
                           class_type: Type[BaseResultT],
                           osm_type: Optional[str] = None,
-                          osm_id: Optional[int] = None) -> Optional[BaseResultT]:
+                          osm_id: Optional[int] = None) -> BaseResultT:
     """ Construct a new result and add the data from the result row
         from the Tiger data interpolation table. 'class_type' defines
         the type of result to return. Returns None if the row is None.
@@ -386,9 +378,6 @@ def create_from_tiger_row(row: Optional[SaRow],
         If the row contains a housenumber, then the housenumber is filled out.
         Otherwise the result contains the interpolation information in extratags.
     """
-    if row is None:
-        return None
-
     hnr = getattr(row, 'housenumber', None)
 
     res = class_type(source_table=SourceTable.TIGER,
@@ -411,15 +400,11 @@ def create_from_tiger_row(row: Optional[SaRow],
     return res
 
 
-def create_from_postcode_row(row: Optional[SaRow],
+def create_from_postcode_row(row: SaRow, class_type: Type[BaseResultT]) -> BaseResultT:
-                             class_type: Type[BaseResultT]) -> Optional[BaseResultT]:
     """ Construct a new result and add the data from the result row
         from the postcode table. 'class_type' defines
         the type of result to return. Returns None if the row is None.
     """
-    if row is None:
-        return None
-
     return class_type(source_table=SourceTable.POSTCODE,
                       place_id=row.place_id,
                       parent_place_id=row.parent_place_id,
@@ -432,15 +417,11 @@ def create_from_postcode_row(row: Optional[SaRow],
                       geometry=_filter_geometries(row))
 
 
-def create_from_country_row(row: Optional[SaRow],
+def create_from_country_row(row: SaRow, class_type: Type[BaseResultT]) -> BaseResultT:
-                            class_type: Type[BaseResultT]) -> Optional[BaseResultT]:
     """ Construct a new result and add the data from the result row
         from the fallback country tables. 'class_type' defines
         the type of result to return. Returns None if the row is None.
     """
-    if row is None:
-        return None
-
     return class_type(source_table=SourceTable.COUNTRY,
                       category=('place', 'country'),
                       centroid=Point.from_wkb(row.centroid),

src/nominatim_api/reverse.py

@@ -21,7 +21,7 @@ from .logging import log
 from .types import AnyPoint, DataLayer, ReverseDetails, GeometryFormat, Bbox
 
 
-RowFunc = Callable[[Optional[SaRow], Type[nres.ReverseResult]], Optional[nres.ReverseResult]]
+RowFunc = Callable[[SaRow, Type[nres.ReverseResult]], nres.ReverseResult]
 
 WKT_PARAM: SaBind = sa.bindparam('wkt', type_=Geometry)
 MAX_RANK_PARAM: SaBind = sa.bindparam('max_rank')
@@ -596,12 +596,13 @@ class ReverseGeocoder:
             if row is None and self.layer_enabled(DataLayer.ADDRESS):
                 row, row_func = await self.lookup_country(ccodes)
 
+        if row is None:
+            return None
+
         result = row_func(row, nres.ReverseResult)
-        if result is not None:
+        result.distance = getattr(row,  'distance', 0)
-            assert row is not None
+        if hasattr(row, 'bbox'):
-            result.distance = getattr(row,  'distance', 0)
+            result.bbox = Bbox.from_wkb(row.bbox)
-            if hasattr(row, 'bbox'):
+        await nres.add_result_details(self.conn, [result], self.params)
-                result.bbox = Bbox.from_wkb(row.bbox)
-            await nres.add_result_details(self.conn, [result], self.params)
 
         return result

src/nominatim_api/search/db_searches/address_search.py

@@ -78,7 +78,6 @@ async def _get_placex_housenumbers(conn: SearchConnection,
 
     for row in await conn.execute(sql):
         result = nres.create_from_placex_row(row, nres.SearchResult)
-        assert result
         result.bbox = Bbox.from_wkb(row.bbox)
         yield result
 
@@ -102,9 +101,7 @@ async def _get_osmline(conn: SearchConnection, place_ids: List[int],
         sql = base.add_geometry_columns(sa.select(sub), sub.c.centroid, details)
 
     for row in await conn.execute(sql):
-        result = nres.create_from_osmline_row(row, nres.SearchResult)
+        yield nres.create_from_osmline_row(row, nres.SearchResult)
-        assert result
-        yield result
 
 
 async def _get_tiger(conn: SearchConnection, place_ids: List[int],
@@ -126,9 +123,7 @@ async def _get_tiger(conn: SearchConnection, place_ids: List[int],
         sql = base.add_geometry_columns(sa.select(sub), sub.c.centroid, details)
 
     for row in await conn.execute(sql):
-        result = nres.create_from_tiger_row(row, nres.SearchResult)
+        yield nres.create_from_tiger_row(row, nres.SearchResult)
-        assert result
-        yield result
 
 
 class AddressSearch(base.AbstractSearch):
@@ -325,7 +320,6 @@ class AddressSearch(base.AbstractSearch):
         results = nres.SearchResults()
         for row in await conn.execute(sql, bind_params):
             result = nres.create_from_placex_row(row, nres.SearchResult)
-            assert result
             result.bbox = Bbox.from_wkb(row.bbox)
             result.accuracy = row.accuracy
             if row.rank_address < 30:

src/nominatim_api/search/db_searches/country_search.py

@@ -56,7 +56,6 @@ class CountrySearch(base.AbstractSearch):
         results = nres.SearchResults()
         for row in await conn.execute(sql, bind_params):
             result = nres.create_from_placex_row(row, nres.SearchResult)
-            assert result
             result.accuracy = self.penalty + self.countries.get_penalty(row.country_code, 5.0)
             result.bbox = Bbox.from_wkb(row.bbox)
             results.append(result)
@@ -111,7 +110,6 @@ class CountrySearch(base.AbstractSearch):
         results = nres.SearchResults()
         for row in await conn.execute(sql, bind_params):
             result = nres.create_from_country_row(row, nres.SearchResult)
-            assert result
             result.bbox = Bbox.from_wkb(row.bbox)
             result.accuracy = self.penalty + self.countries.get_penalty(row.country_code, 5.0)
             results.append(result)

src/nominatim_api/search/db_searches/near_search.py

@@ -130,7 +130,6 @@ class NearSearch(base.AbstractSearch):
                        'countries': details.countries}
         for row in await conn.execute(sql, bind_params):
             result = nres.create_from_placex_row(row, nres.SearchResult)
-            assert result
             result.accuracy = self.penalty + penalty
             result.bbox = Bbox.from_wkb(row.bbox)
             results.append(result)

src/nominatim_api/search/db_searches/place_search.py

@@ -202,7 +202,6 @@ class PlaceSearch(base.AbstractSearch):
         results = nres.SearchResults()
         for row in await conn.execute(sql, bind_params):
             result = nres.create_from_placex_row(row, nres.SearchResult)
-            assert result
             result.bbox = Bbox.from_wkb(row.bbox)
             result.accuracy = row.accuracy
             results.append(result)

src/nominatim_api/search/db_searches/poi_search.py

@@ -106,7 +106,6 @@ class PoiSearch(base.AbstractSearch):
         results = nres.SearchResults()
         for row in rows:
             result = nres.create_from_placex_row(row, nres.SearchResult)
-            assert result
             result.accuracy = self.penalty + self.qualifiers.get_penalty((row.class_, row.type))
             result.bbox = Bbox.from_wkb(row.bbox)
             results.append(result)

src/nominatim_api/search/db_searches/postcode_search.py

@@ -121,7 +121,6 @@ class PostcodeSearch(base.AbstractSearch):
             else:
                 result = nres.create_from_postcode_row(row, nres.SearchResult)
 
-            assert result
             if result.place_id not in details.excluded:
                 result.accuracy = row.accuracy
                 results.append(result)

test/python/api/test_results.py

@@ -48,14 +48,6 @@ def test_detailed_result_custom_importance():
     assert res.calculated_importance() == 0.4563
 
 
-@pytest.mark.parametrize('func', (nresults.create_from_placex_row,
-                                  nresults.create_from_osmline_row,
-                                  nresults.create_from_tiger_row,
-                                  nresults.create_from_postcode_row))
-def test_create_row_none(func):
-    assert func(None, DetailedResult) is None
-
-
 @pytest.mark.parametrize('func', (nresults.create_from_osmline_row,
                                   nresults.create_from_tiger_row))
 def test_create_row_with_housenumber(func):