refactor: extract app log SQL queries to Service and Repository layers

api/app/controllers/app_log_controller.py

@@ -3,17 +3,16 @@ import uuid
 from typing import Optional
 
 from fastapi import APIRouter, Depends, Query
-from sqlalchemy import select, desc, func
 from sqlalchemy.orm import Session
 
 from app.core.logging_config import get_business_logger
 from app.core.response_utils import success
 from app.db import get_db
 from app.dependencies import get_current_user, cur_workspace_access_guard
-from app.models.conversation_model import Conversation, Message
-from app.schemas.app_log_schema import AppLogConversation, AppLogConversationDetail, AppLogMessage
+from app.schemas.app_log_schema import AppLogConversation, AppLogConversationDetail
 from app.schemas.response_schema import PageData, PageMeta
 from app.services.app_service import AppService
+from app.services.app_log_service import AppLogService
 
 router = APIRouter(prefix="/apps", tags=["App Logs"])
 logger = get_business_logger()
@@ -38,35 +37,22 @@ def list_app_logs(
     workspace_id = current_user.current_workspace_id
 
     # 验证应用访问权限
-    service = AppService(db)
-    service.get_app(app_id, workspace_id)
+    app_service = AppService(db)
+    app_service.get_app(app_id, workspace_id)
 
-    stmt = select(Conversation).where(
-        Conversation.app_id == app_id,
-        Conversation.workspace_id == workspace_id,
-        Conversation.is_active.is_(True),
+    # 使用 Service 层查询
+    log_service = AppLogService(db)
+    conversations, total = log_service.list_conversations(
+        app_id=app_id,
+        workspace_id=workspace_id,
+        page=page,
+        pagesize=pagesize,
+        is_draft=is_draft
     )
 
-    if is_draft is not None:
-        stmt = stmt.where(Conversation.is_draft == is_draft)
-
-    total = int(db.execute(
-        select(func.count()).select_from(stmt.subquery())
-    ).scalar_one())
-
-    stmt = stmt.order_by(desc(Conversation.updated_at))
-    stmt = stmt.offset((page - 1) * pagesize).limit(pagesize)
-
-    conversations = list(db.scalars(stmt).all())
-
     items = [AppLogConversation.model_validate(c) for c in conversations]
     meta = PageMeta(page=page, pagesize=pagesize, total=total, hasnext=(page * pagesize) < total)
 
-    logger.info(
-        "查询应用日志会话列表",
-        extra={"app_id": str(app_id), "total": total, "page": page}
-    )
-
     return success(data=PageData(page=meta, items=items))
 
 
@@ -87,40 +73,17 @@ def get_app_log_detail(
     workspace_id = current_user.current_workspace_id
 
     # 验证应用访问权限
-    service = AppService(db)
-    service.get_app(app_id, workspace_id)
+    app_service = AppService(db)
+    app_service.get_app(app_id, workspace_id)
 
-    # 查询会话（确保属于该应用和工作空间）
-    conversation = db.scalars(
-        select(Conversation).where(
-            Conversation.id == conversation_id,
-            Conversation.app_id == app_id,
-            Conversation.workspace_id == workspace_id,
-            Conversation.is_active.is_(True),
-        )
-    ).first()
-
-    if not conversation:
-        from app.core.exceptions import ResourceNotFoundException
-        raise ResourceNotFoundException("会话", str(conversation_id))
-
-    # 查询消息（按时间正序）
-    messages = list(db.scalars(
-        select(Message)
-        .where(Message.conversation_id == conversation_id)
-        .order_by(Message.created_at)
-    ).all())
-
-    detail = AppLogConversationDetail.model_validate(conversation)
-    detail.messages = [AppLogMessage.model_validate(m) for m in messages]
-
-    logger.info(
-        "查询应用日志会话详情",
-        extra={
-            "app_id": str(app_id),
-            "conversation_id": str(conversation_id),
-            "message_count": len(messages)
-        }
+    # 使用 Service 层查询
+    log_service = AppLogService(db)
+    conversation = log_service.get_conversation_detail(
+        app_id=app_id,
+        conversation_id=conversation_id,
+        workspace_id=workspace_id
     )
 
+    detail = AppLogConversationDetail.model_validate(conversation)
+
     return success(data=detail)

api/app/repositories/conversation_repository.py

@@ -199,6 +199,96 @@ class ConversationRepository:
         )
         return conversations, total
 
+    def list_app_conversations(
+            self,
+            app_id: uuid.UUID,
+            workspace_id: uuid.UUID,
+            is_draft: Optional[bool] = None,
+            page: int = 1,
+            pagesize: int = 20
+    ) -> tuple[list[Conversation], int]:
+        """
+        查询应用日志会话列表（带分页和过滤）
+
+        Args:
+            app_id: 应用 ID
+            workspace_id: 工作空间 ID
+            is_draft: 是否草稿会话（None 表示不过滤）
+            page: 页码（从 1 开始）
+            pagesize: 每页数量
+
+        Returns:
+            Tuple[List[Conversation], int]: (会话列表，总数)
+        """
+        stmt = select(Conversation).where(
+            Conversation.app_id == app_id,
+            Conversation.workspace_id == workspace_id,
+            Conversation.is_active.is_(True)
+        )
+
+        if is_draft is not None:
+            stmt = stmt.where(Conversation.is_draft == is_draft)
+
+        # Calculate total number of records
+        total = int(self.db.execute(
+            select(func.count()).select_from(stmt.subquery())
+        ).scalar_one())
+
+        # Apply pagination
+        stmt = stmt.order_by(desc(Conversation.updated_at))
+        stmt = stmt.offset((page - 1) * pagesize).limit(pagesize)
+
+        conversations = list(self.db.scalars(stmt).all())
+
+        logger.info(
+            "Listed app conversations successfully",
+            extra={
+                "app_id": str(app_id),
+                "workspace_id": str(workspace_id),
+                "returned": len(conversations),
+                "total": total
+            }
+        )
+        return conversations, total
+
+    def get_conversation_for_app_log(
+            self,
+            conversation_id: uuid.UUID,
+            app_id: uuid.UUID,
+            workspace_id: uuid.UUID
+    ) -> Conversation:
+        """
+        查询应用日志的会话详情
+
+        Args:
+            conversation_id: 会话 ID
+            app_id: 应用 ID
+            workspace_id: 工作空间 ID
+
+        Returns:
+            Conversation: 会话对象
+
+        Raises:
+            ResourceNotFoundException: 当会话不存在时
+        """
+        logger.info(f"Fetching conversation for app log: {conversation_id}")
+
+        stmt = select(Conversation).where(
+            Conversation.id == conversation_id,
+            Conversation.app_id == app_id,
+            Conversation.workspace_id == workspace_id,
+            Conversation.is_active.is_(True)
+        )
+
+        conversation = self.db.scalars(stmt).first()
+
+        if not conversation:
+            logger.warning(f"Conversation not found: {conversation_id}")
+            raise ResourceNotFoundException("会话", str(conversation_id))
+
+        logger.info(f"Conversation fetched successfully: {conversation_id}")
+        return conversation
+
     def soft_delete_conversation_by_conversation_id(
             self,
             conversation_id: uuid.UUID,
@@ -290,6 +380,34 @@ class MessageRepository:
         self.db.add(message)
         return message
 
+    def get_messages_by_conversation(
+            self,
+            conversation_id: uuid.UUID
+    ) -> list[Message]:
+        """
+        查询会话的所有消息（按时间正序）
+
+        Args:
+            conversation_id: 会话 ID
+
+        Returns:
+            List[Message]: 消息列表
+        """
+        stmt = select(Message).where(
+            Message.conversation_id == conversation_id
+        ).order_by(Message.created_at)
+
+        messages = list(self.db.scalars(stmt).all())
+
+        logger.info(
+            "Fetched messages for conversation",
+            extra={
+                "conversation_id": str(conversation_id),
+                "message_count": len(messages)
+            }
+        )
+        return messages
+
     def get_message_by_conversation_id(
             self,
             conversation_id: uuid.UUID,

api/app/services/app_log_service.py

@@ -0,0 +1,128 @@
+"""应用日志服务层"""
+import uuid
+from typing import Optional, Tuple
+from datetime import datetime
+
+from sqlalchemy.orm import Session
+
+from app.core.logging_config import get_business_logger
+from app.models.conversation_model import Conversation, Message
+from app.repositories.conversation_repository import ConversationRepository, MessageRepository
+
+logger = get_business_logger()
+
+
+class AppLogService:
+    """应用日志服务"""
+
+    def __init__(self, db: Session):
+        self.db = db
+        self.conversation_repository = ConversationRepository(db)
+        self.message_repository = MessageRepository(db)
+
+    def list_conversations(
+        self,
+        app_id: uuid.UUID,
+        workspace_id: uuid.UUID,
+        page: int = 1,
+        pagesize: int = 20,
+        is_draft: Optional[bool] = None,
+    ) -> Tuple[list[Conversation], int]:
+        """
+        查询应用日志会话列表
+
+        Args:
+            app_id: 应用 ID
+            workspace_id: 工作空间 ID
+            page: 页码（从 1 开始）
+            pagesize: 每页数量
+            is_draft: 是否草稿会话（None 表示不过滤）
+
+        Returns:
+            Tuple[list[Conversation], int]: (会话列表，总数)
+        """
+        logger.info(
+            "查询应用日志会话列表",
+            extra={
+                "app_id": str(app_id),
+                "workspace_id": str(workspace_id),
+                "page": page,
+                "pagesize": pagesize,
+                "is_draft": is_draft
+            }
+        )
+
+        # 使用 Repository 查询
+        conversations, total = self.conversation_repository.list_app_conversations(
+            app_id=app_id,
+            workspace_id=workspace_id,
+            is_draft=is_draft,
+            page=page,
+            pagesize=pagesize
+        )
+
+        logger.info(
+            "查询应用日志会话列表成功",
+            extra={
+                "app_id": str(app_id),
+                "total": total,
+                "returned": len(conversations)
+            }
+        )
+
+        return conversations, total
+
+    def get_conversation_detail(
+        self,
+        app_id: uuid.UUID,
+        conversation_id: uuid.UUID,
+        workspace_id: uuid.UUID
+    ) -> Conversation:
+        """
+        查询会话详情（包含消息）
+
+        Args:
+            app_id: 应用 ID
+            conversation_id: 会话 ID
+            workspace_id: 工作空间 ID
+
+        Returns:
+            Conversation: 包含消息的会话对象
+
+        Raises:
+            ResourceNotFoundException: 当会话不存在时
+        """
+        logger.info(
+            "查询应用日志会话详情",
+            extra={
+                "app_id": str(app_id),
+                "conversation_id": str(conversation_id),
+                "workspace_id": str(workspace_id)
+            }
+        )
+
+        # 查询会话
+        conversation = self.conversation_repository.get_conversation_for_app_log(
+            conversation_id=conversation_id,
+            app_id=app_id,
+            workspace_id=workspace_id
+        )
+
+        # 查询消息（按时间正序）
+        messages = self.message_repository.get_messages_by_conversation(
+            conversation_id=conversation_id
+        )
+
+        # 将消息附加到会话对象
+        conversation.messages = messages
+
+        logger.info(
+            "查询应用日志会话详情成功",
+            extra={
+                "app_id": str(app_id),
+                "conversation_id": str(conversation_id),
+                "message_count": len(messages)
+            }
+        )
+
+        return conversation