Migrate SQLAlchemy from 1.x to 2.0 with automated and manual adjustments (#23224)

Co-authored-by: Yongtao Huang <99629139+hyongtao-db@users.noreply.github.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

api/core/app/apps/completion/app_generator.py

@@ -6,6 +6,7 @@ from typing import Any, Literal, Union, overload
 
 from flask import Flask, copy_current_request_context, current_app
 from pydantic import ValidationError
+from sqlalchemy import select
 
 from configs import dify_config
 from core.app.app_config.easy_ui_based_app.model_config.converter import ModelConfigConverter
@@ -248,17 +249,14 @@ class CompletionAppGenerator(MessageBasedAppGenerator):
         :param invoke_from: invoke from source
         :param stream: is stream
         """
-        message = (
-            db.session.query(Message)
-            .where(
-                Message.id == message_id,
-                Message.app_id == app_model.id,
-                Message.from_source == ("api" if isinstance(user, EndUser) else "console"),
-                Message.from_end_user_id == (user.id if isinstance(user, EndUser) else None),
-                Message.from_account_id == (user.id if isinstance(user, Account) else None),
-            )
-            .first()
+        stmt = select(Message).where(
+            Message.id == message_id,
+            Message.app_id == app_model.id,
+            Message.from_source == ("api" if isinstance(user, EndUser) else "console"),
+            Message.from_end_user_id == (user.id if isinstance(user, EndUser) else None),
+            Message.from_account_id == (user.id if isinstance(user, Account) else None),
         )
+        message = db.session.scalar(stmt)
 
         if not message:
             raise MessageNotExistsError()

api/core/app/apps/completion/app_runner.py

@@ -1,6 +1,8 @@
 import logging
 from typing import cast
 
+from sqlalchemy import select
+
 from core.app.apps.base_app_queue_manager import AppQueueManager
 from core.app.apps.base_app_runner import AppRunner
 from core.app.apps.completion.app_config_manager import CompletionAppConfig
@@ -35,8 +37,8 @@ class CompletionAppRunner(AppRunner):
         """
         app_config = application_generate_entity.app_config
         app_config = cast(CompletionAppConfig, app_config)
-
-        app_record = db.session.query(App).where(App.id == app_config.app_id).first()
+        stmt = select(App).where(App.id == app_config.app_id)
+        app_record = db.session.scalar(stmt)
         if not app_record:
             raise ValueError("App not found")