S01E07

databases/backends/common/records.py

@@ -1,5 +1,4 @@
 import typing
-from collections import namedtuple
 
 from sqlalchemy.engine.interfaces import Dialect
 from sqlalchemy.engine.row import Row as SQLRow
@@ -53,7 +52,10 @@ def values(self) -> typing.ValuesView:
 
     def __getitem__(self, key: typing.Any) -> typing.Any:
         if len(self._column_map) == 0:
-            return self._row[key]
+            try:
+                return self._row[key]
+            except TypeError:
+                return self._mapping[key]
         elif isinstance(key, Column):
             idx, datatype = self._column_map_full[str(key)]
         elif isinstance(key, int):

databases/backends/psycopg.py

@@ -3,9 +3,10 @@
 import psycopg
 import psycopg_pool
 from psycopg.rows import namedtuple_row
-from sqlalchemy.engine.interfaces import Dialect
 from sqlalchemy.dialects.postgresql.psycopg import PGDialect_psycopg
+from sqlalchemy.engine.interfaces import Dialect
 from sqlalchemy.sql import ClauseElement
+from sqlalchemy.sql.schema import Column
 
 from databases.backends.common.records import Record, create_column_maps
 from databases.core import DatabaseURL
@@ -31,6 +32,7 @@ def __init__(
         self._database_url = DatabaseURL(database_url)
         self._options = options
         self._dialect = PGDialect_psycopg()
+        self._dialect.implicit_returning = True
         self._pool = None
 
     async def connect(self) -> None:
@@ -94,7 +96,7 @@ async def fetch_all(self, query: ClauseElement) -> typing.List[RecordInterface]:
             rows = await cursor.fetchall()
 
         column_maps = create_column_maps(result_columns)
-        return [Record(row, result_columns, self._dialect, column_maps) for row in rows]
+        return [PsycopgRecord(row, result_columns, self._dialect, column_maps) for row in rows]
 
     async def fetch_one(self, query: ClauseElement) -> typing.Optional[RecordInterface]:
         if self._connection is None:
@@ -109,7 +111,7 @@ async def fetch_one(self, query: ClauseElement) -> typing.Optional[RecordInterfa
         if row is None:
             return None
 
-        return Record(
+        return PsycopgRecord(
             row,
             result_columns,
             self._dialect,
@@ -154,7 +156,7 @@ async def iterate(
                 if row is None:
                     break
 
-                yield Record(row, result_columns, self._dialect, column_maps)
+                yield PsycopgRecord(row, result_columns, self._dialect, column_maps)
 
     def transaction(self) -> "TransactionBackend":
         return PsycopgTransaction(connection=self)
@@ -214,3 +216,21 @@ async def rollback(self) -> None:
 
         async with self._transaction._conn.lock:
             await self._transaction._conn.wait(self._transaction._rollback_gen(None))
+
+
+class PsycopgRecord(Record):
+    @property
+    def _mapping(self) -> typing.Mapping:
+        return self._row._asdict()
+
+    def __getitem__(self, key: typing.Any) -> typing.Any:
+        if len(self._column_map) == 0:
+            return self._mapping[key]
+        elif isinstance(key, Column):
+            idx, datatype = self._column_map_full[str(key)]
+        elif isinstance(key, int):
+            idx, datatype = self._column_map_int[key]
+        else:
+            idx, datatype = self._column_map[key]
+
+        return self._row[idx]