improve display name for postcodes

Don't add the postcode again in the list of address details and
make sure that the result proper always comes before anything else
independently of the address rank.

diff --git a/nominatim/api/results.py b/nominatim/api/results.py
index d66da6c6f5c1df705075989136da50a23c214972..47fb85114634de804f36fa569dc79986894dccc4 100644 (file)
--- 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, cast
+from typing import Optional, Tuple, Dict, Sequence, TypeVar, Type, List, cast, Callable
 import enum
 import dataclasses
 import datetime as dt
@@ -501,15 +501,17 @@ def _get_address_lookup_id(result: BaseResultT) -> int:
 
 async def _finalize_entry(conn: SearchConnection, result: BaseResultT) -> None:
     assert result.address_rows is not None
-    postcode = result.postcode
-    if not postcode and result.address:
-        postcode = result.address.get('postcode')
-    if postcode and ',' not in postcode and ';' not in postcode:
-        result.address_rows.append(AddressLine(
-            category=('place', 'postcode'),
-            names={'ref': postcode},
-            fromarea=False, isaddress=True, rank_address=5,
-            distance=0.0))
+    if result.category[0] not in ('boundary', 'place')\
+       or result.category[1] not in ('postal_code', 'postcode'):
+        postcode = result.postcode
+        if not postcode and result.address:
+            postcode = result.address.get('postcode')
+        if postcode and ',' not in postcode and ';' not in postcode:
+            result.address_rows.append(AddressLine(
+                category=('place', 'postcode'),
+                names={'ref': postcode},
+                fromarea=False, isaddress=True, rank_address=5,
+                distance=0.0))
     if result.country_code:
         async def _get_country_names() -> Optional[Dict[str, str]]:
             t = conn.t.country_name
@@ -551,7 +553,7 @@ def _setup_address_details(result: BaseResultT) -> None:
             extratags=result.extratags or {},
             admin_level=result.admin_level,
             fromarea=True, isaddress=True,
-            rank_address=result.rank_address or 100, distance=0.0))
+            rank_address=result.rank_address, distance=0.0))
     if result.source_table == SourceTable.PLACEX and result.address:
         housenumber = result.address.get('housenumber')\
                       or result.address.get('streetnumber')\
@@ -676,9 +678,12 @@ async def complete_address_details(conn: SearchConnection, results: List[BaseRes
                     rank_address=row.rank_address, distance=0.0))
 
     ### Now sort everything
+    def mk_sort_key(place_id: Optional[int]) -> Callable[[AddressLine], Tuple[bool, int, bool]]:
+        return lambda a: (a.place_id != place_id, -a.rank_address, a.isaddress)
+
     for result in results:
         assert result.address_rows is not None
-        result.address_rows.sort(key=lambda a: (-a.rank_address, a.isaddress))
+        result.address_rows.sort(key=mk_sort_key(result.place_id))
 
 
 def _placex_select_address_row(conn: SearchConnection,