always add a penalty for name + address search fallback

[nominatim.git] / nominatim / api / search / db_searches.py

diff --git a/nominatim/api/search/db_searches.py b/nominatim/api/search/db_searches.py
index cc352134cffd313ab5dd846357021359c0fc8105..555819e7451dac76042482cd101ffbdfd067c882 100644 (file)
--- a/nominatim/api/search/db_searches.py
+++ b/nominatim/api/search/db_searches.py
@@ -245,6 +245,7 @@ async def _get_tiger(conn: SearchConnection, place_ids: List[int],
 class AbstractSearch(abc.ABC):
     """ Encapuslation of a single lookup in the database.
     """
+    SEARCH_PRIO: int = 2
 
     def __init__(self, penalty: float) -> None:
         self.penalty = penalty
@@ -448,6 +449,8 @@ class PoiSearch(AbstractSearch):
 class CountrySearch(AbstractSearch):
     """ Search for a country name or country code.
     """
+    SEARCH_PRIO = 0
+
     def __init__(self, sdata: SearchData) -> None:
         super().__init__(sdata.penalty)
         self.countries = sdata.countries
@@ -481,7 +484,14 @@ class CountrySearch(AbstractSearch):
             result.bbox = Bbox.from_wkb(row.bbox)
             results.append(result)
 
-        return results or await self.lookup_in_country_table(conn, details)
+        if not results:
+            results = await self.lookup_in_country_table(conn, details)
+
+        if results:
+            details.min_rank = min(5, details.max_rank)
+            details.max_rank = min(25, details.max_rank)
+
+        return results
 
 
     async def lookup_in_country_table(self, conn: SearchConnection,
@@ -604,6 +614,8 @@ class PostcodeSearch(AbstractSearch):
 class PlaceSearch(AbstractSearch):
     """ Generic search for an address or named place.
     """
+    SEARCH_PRIO = 1
+
     def __init__(self, extra_penalty: float, sdata: SearchData, expected_count: int) -> None:
         super().__init__(sdata.penalty + extra_penalty)
         self.countries = sdata.countries
@@ -663,7 +675,7 @@ class PlaceSearch(AbstractSearch):
                 sql = sql.where(tsearch.c.centroid
                                          .intersects(VIEWBOX_PARAM,
                                                      use_index=details.viewbox.area < 0.2))
-            elif self.expected_count >= 10000:
+            elif not self.postcodes and not self.housenumbers and self.expected_count >= 10000:
                 sql = sql.where(tsearch.c.centroid
                                          .intersects(VIEWBOX2_PARAM,
                                                      use_index=details.viewbox.area < 0.5))