Switch relationship loading to selectionload (#758)

sqladmin/_queries.py

@@ -3,7 +3,7 @@
 import anyio
 from sqlalchemy import select
 from sqlalchemy.ext.asyncio import AsyncSession
-from sqlalchemy.orm import Session, joinedload
+from sqlalchemy.orm import Session, selectinload
 from sqlalchemy.sql.expression import Select, and_, or_
 from starlette.requests import Request
 
@@ -152,7 +152,7 @@ async def _update_async(
         stmt = self.model_view._stmt_by_identifier(pk)
 
         for relation in self.model_view._form_relations:
-            stmt = stmt.options(joinedload(relation))
+            stmt = stmt.options(selectinload(relation))
 
         async with self.model_view.session_maker(expire_on_commit=False) as session:
             result = await session.execute(stmt)

sqladmin/models.py

@@ -20,7 +20,7 @@
 import anyio
 from sqlalchemy import Column, String, asc, cast, desc, func, inspect, or_
 from sqlalchemy.exc import NoInspectionAvailable
-from sqlalchemy.orm import joinedload, sessionmaker
+from sqlalchemy.orm import selectinload, sessionmaker
 from sqlalchemy.orm.exc import DetachedInstanceError
 from sqlalchemy.sql.elements import ClauseElement
 from sqlalchemy.sql.expression import Select, select
@@ -772,7 +772,7 @@ async def list(self, request: Request) -> Pagination:
 
         stmt = self.list_query(request)
         for relation in self._list_relations:
-            stmt = stmt.options(joinedload(relation))
+            stmt = stmt.options(selectinload(relation))
 
         stmt = self.sort_query(stmt, request)
 
@@ -802,7 +802,7 @@ async def get_model_objects(
         stmt = self.list_query(request).limit(limit)
 
         for relation in self._list_relations:
-            stmt = stmt.options(joinedload(relation))
+            stmt = stmt.options(selectinload(relation))
 
         rows = await self._run_query(stmt)
         return rows
@@ -815,7 +815,7 @@ async def get_object_for_details(self, value: Any) -> Any:
         stmt = self._stmt_by_identifier(value)
 
         for relation in self._details_relations:
-            stmt = stmt.options(joinedload(relation))
+            stmt = stmt.options(selectinload(relation))
 
         return await self._get_object_by_pk(stmt)
 
@@ -1062,7 +1062,7 @@ def edit_form_query(self, request: Request) -> Select:
 
         stmt = self._stmt_by_identifier(request.path_params["pk"])
         for relation in self._form_relations:
-            stmt = stmt.options(joinedload(relation))
+            stmt = stmt.options(selectinload(relation))
         return stmt
 
     def count_query(self, request: Request) -> Select: