X-Git-Url: https://git.openstreetmap.org./nominatim.git/blobdiff_plain/86b43dc605cd7e02e08b8c63c90ffe41ab26e3d2..2755ebe88360c56f9e82c5b910362ac402cc1ed0:/nominatim/api/results.py diff --git a/nominatim/api/results.py b/nominatim/api/results.py index 098851ef..c661b508 100644 --- a/nominatim/api/results.py +++ b/nominatim/api/results.py @@ -11,7 +11,7 @@ Data classes are part of the public API while the functions are for internal use only. That's why they are implemented as free-standing functions instead of member functions. """ -from typing import Optional, Tuple, Dict, Sequence, TypeVar, Type, List +from typing import Optional, Tuple, Dict, Sequence, TypeVar, Type, List, Any import enum import dataclasses import datetime as dt @@ -27,6 +27,24 @@ from nominatim.api.localization import Locales # This file defines complex result data classes. # pylint: disable=too-many-instance-attributes +def _mingle_name_tags(names: Optional[Dict[str, str]]) -> Optional[Dict[str, str]]: + """ Mix-in names from linked places, so that they show up + as standard names where necessary. + """ + if not names: + return None + + out = {} + for k, v in names.items(): + if k.startswith('_place_'): + outkey = k[7:] + out[k if outkey in names else outkey] = v + else: + out[k] = v + + return out + + class SourceTable(enum.Enum): """ Enumeration of kinds of results. """ @@ -103,6 +121,9 @@ class BaseResult: place_id : Optional[int] = None osm_object: Optional[Tuple[str, int]] = None + locale_name: Optional[str] = None + display_name: Optional[str] = None + names: Optional[Dict[str, str]] = None address: Optional[Dict[str, str]] = None extratags: Optional[Dict[str, str]] = None @@ -146,6 +167,19 @@ class BaseResult: """ return self.importance or (0.7500001 - (self.rank_search/40.0)) + + def localize(self, locales: Locales) -> None: + """ Fill the locale_name and the display_name field for the + place and, if available, its address information. + """ + self.locale_name = locales.display_name(self.names) + if self.address_rows: + self.display_name = ', '.join(self.address_rows.localize(locales)) + else: + self.display_name = self.locale_name + + + BaseResultT = TypeVar('BaseResultT', bound=BaseResult) @dataclasses.dataclass @@ -173,6 +207,34 @@ class ReverseResults(List[ReverseResult]): """ +@dataclasses.dataclass +class SearchResult(BaseResult): + """ A search result for forward geocoding. + """ + bbox: Optional[Bbox] = None + accuracy: float = 0.0 + + + @property + def ranking(self) -> float: + """ Return the ranking, a combined measure of accuracy and importance. + """ + return (self.accuracy if self.accuracy is not None else 1) \ + - self.calculated_importance() + + +class SearchResults(List[SearchResult]): + """ Sequence of forward lookup results ordered by relevance. + May be empty when no result was found. + """ + + def localize(self, locales: Locales) -> None: + """ Apply the given locales to all results. + """ + for result in self: + result.localize(locales) + + def _filter_geometries(row: SaRow) -> Dict[str, str]: return {k[9:]: v for k, v in row._mapping.items() # pylint: disable=W0212 if k.startswith('geometry_')} @@ -191,7 +253,7 @@ def create_from_placex_row(row: Optional[SaRow], place_id=row.place_id, osm_object=(row.osm_type, row.osm_id), category=(row.class_, row.type), - names=row.name, + names=_mingle_name_tags(row.name), address=row.address, extratags=row.extratags, housenumber=row.housenumber, @@ -292,24 +354,45 @@ def create_from_postcode_row(row: Optional[SaRow], geometry=_filter_geometries(row)) -async def add_result_details(conn: SearchConnection, result: BaseResult, +def create_from_country_row(row: Optional[SaRow], + 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.data), + names=row.name, + rank_address=4, rank_search=4, + country_code=row.country_code) + + +async def add_result_details(conn: SearchConnection, results: List[BaseResultT], details: LookupDetails) -> None: """ Retrieve more details from the database according to the parameters specified in 'details'. """ - log().section('Query details for result') - if details.address_details: - log().comment('Query address details') - await complete_address_details(conn, result) - if details.linked_places: - log().comment('Query linked places') - await complete_linked_places(conn, result) - if details.parented_places: - log().comment('Query parent places') - await complete_parented_places(conn, result) - if details.keywords: - log().comment('Query keywords') - await complete_keywords(conn, result) + if results: + log().section('Query details for result') + if details.address_details: + log().comment('Query address details') + await complete_address_details(conn, results) + if details.linked_places: + log().comment('Query linked places') + for result in results: + await complete_linked_places(conn, result) + if details.parented_places: + log().comment('Query parent places') + for result in results: + await complete_parented_places(conn, result) + if details.keywords: + log().comment('Query keywords') + for result in results: + await complete_keywords(conn, result) def _result_row_to_address_row(row: SaRow) -> AddressLine: @@ -319,10 +402,8 @@ def _result_row_to_address_row(row: SaRow) -> AddressLine: if hasattr(row, 'place_type') and row.place_type: extratags['place'] = row.place_type - names = row.name + names = _mingle_name_tags(row.name) or {} if getattr(row, 'housenumber', None) is not None: - if names is None: - names = {} names['housenumber'] = row.housenumber return AddressLine(place_id=row.place_id, @@ -337,35 +418,60 @@ def _result_row_to_address_row(row: SaRow) -> AddressLine: distance=row.distance) -async def complete_address_details(conn: SearchConnection, result: BaseResult) -> None: +async def complete_address_details(conn: SearchConnection, results: List[BaseResultT]) -> None: """ Retrieve information about places that make up the address of the result. """ - housenumber = -1 - if result.source_table in (SourceTable.TIGER, SourceTable.OSMLINE): - if result.housenumber is not None: - housenumber = int(result.housenumber) - elif result.extratags is not None and 'startnumber' in result.extratags: - # details requests do not come with a specific house number - housenumber = int(result.extratags['startnumber']) - - sfn = sa.func.get_addressdata(result.place_id, housenumber)\ - .table_valued( # type: ignore[no-untyped-call] - sa.column('place_id', type_=sa.Integer), - 'osm_type', - sa.column('osm_id', type_=sa.BigInteger), - sa.column('name', type_=conn.t.types.Composite), - 'class', 'type', 'place_type', - sa.column('admin_level', type_=sa.Integer), - sa.column('fromarea', type_=sa.Boolean), - sa.column('isaddress', type_=sa.Boolean), - sa.column('rank_address', type_=sa.SmallInteger), - sa.column('distance', type_=sa.Float)) - sql = sa.select(sfn).order_by(sa.column('rank_address').desc(), - sa.column('isaddress').desc()) - - result.address_rows = AddressLines() + def get_hnr(result: BaseResult) -> Tuple[int, int]: + housenumber = -1 + if result.source_table in (SourceTable.TIGER, SourceTable.OSMLINE): + if result.housenumber is not None: + housenumber = int(result.housenumber) + elif result.extratags is not None and 'startnumber' in result.extratags: + # details requests do not come with a specific house number + housenumber = int(result.extratags['startnumber']) + assert result.place_id + return result.place_id, housenumber + + data: List[Tuple[Any, ...]] = [get_hnr(r) for r in results if r.place_id] + + if not data: + return + + values = sa.values(sa.column('place_id', type_=sa.Integer), + sa.column('housenumber', type_=sa.Integer), + name='places', + literal_binds=True).data(data) + + sfn = sa.func.get_addressdata(values.c.place_id, values.c.housenumber)\ + .table_valued( # type: ignore[no-untyped-call] + sa.column('place_id', type_=sa.Integer), + 'osm_type', + sa.column('osm_id', type_=sa.BigInteger), + sa.column('name', type_=conn.t.types.Composite), + 'class', 'type', 'place_type', + sa.column('admin_level', type_=sa.Integer), + sa.column('fromarea', type_=sa.Boolean), + sa.column('isaddress', type_=sa.Boolean), + sa.column('rank_address', type_=sa.SmallInteger), + sa.column('distance', type_=sa.Float), + joins_implicitly=True) + + sql = sa.select(values.c.place_id.label('result_place_id'), sfn)\ + .order_by(values.c.place_id, + sa.column('rank_address').desc(), + sa.column('isaddress').desc()) + + current_result = None for row in await conn.execute(sql): - result.address_rows.append(_result_row_to_address_row(row)) + if current_result is None or row.result_place_id != current_result.place_id: + for result in results: + if result.place_id == row.result_place_id: + current_result = result + break + else: + assert False + current_result.address_rows = AddressLines() + current_result.address_rows.append(_result_row_to_address_row(row)) # pylint: disable=consider-using-f-string @@ -400,6 +506,9 @@ async def complete_linked_places(conn: SearchConnection, result: BaseResult) -> async def complete_keywords(conn: SearchConnection, result: BaseResult) -> None: """ Retrieve information about the search terms used for this place. + + Requires that the query analyzer was initialised to get access to + the word table. """ t = conn.t.search_name sql = sa.select(t.c.name_vector, t.c.nameaddress_vector)\ @@ -407,10 +516,11 @@ async def complete_keywords(conn: SearchConnection, result: BaseResult) -> None: result.name_keywords = [] result.address_keywords = [] - for name_tokens, address_tokens in await conn.execute(sql): - t = conn.t.word - sel = sa.select(t.c.word_id, t.c.word_token, t.c.word) + t = conn.t.meta.tables['word'] + sel = sa.select(t.c.word_id, t.c.word_token, t.c.word) + + for name_tokens, address_tokens in await conn.execute(sql): for row in await conn.execute(sel.where(t.c.word_id == sa.any_(name_tokens))): result.name_keywords.append(WordInfo(*row))