refactor(expression_learner): 优化表达方式查询逻辑，减少数据库查询次数并批量处理更新操作

refactor(storage): 添加消息更新批处理器，优化消息ID更新逻辑以减少数据库连接次数

src/chat/express/expression_learner.py

@@ -234,51 +234,45 @@ class ExpressionLearner:
         """
         获取指定chat_id的style和grammar表达方式
         返回的每个表达方式字典中都包含了source_id, 用于后续的更新操作
+        
+        优化: 一次查询获取所有类型的表达方式，避免多次数据库查询
         """
         learnt_style_expressions = []
         learnt_grammar_expressions = []
 
-        # 直接从数据库查询
+        # 优化: 一次查询获取所有表达方式
         async with get_db_session() as session:
-            style_query = await session.execute(
-                select(Expression).where((Expression.chat_id == self.chat_id) & (Expression.type == "style"))
+            all_expressions = await session.execute(
+                select(Expression).where(Expression.chat_id == self.chat_id)
             )
-        for expr in style_query.scalars():
+            
+            for expr in all_expressions.scalars():
                 # 确保create_date存在，如果不存在则使用last_active_time
                 create_date = expr.create_date if expr.create_date is not None else expr.last_active_time
-            learnt_style_expressions.append(
-                {
+                
+                expr_data = {
                     "situation": expr.situation,
                     "style": expr.style,
                     "count": expr.count,
                     "last_active_time": expr.last_active_time,
                     "source_id": self.chat_id,
-                    "type": "style",
+                    "type": expr.type,
                     "create_date": create_date,
                 }
-            )
-        grammar_query = await session.execute(
-            select(Expression).where((Expression.chat_id == self.chat_id) & (Expression.type == "grammar"))
-        )
-        for expr in grammar_query.scalars():
-            # 确保create_date存在，如果不存在则使用last_active_time
-            create_date = expr.create_date if expr.create_date is not None else expr.last_active_time
-            learnt_grammar_expressions.append(
-                {
-                    "situation": expr.situation,
-                    "style": expr.style,
-                    "count": expr.count,
-                    "last_active_time": expr.last_active_time,
-                    "source_id": self.chat_id,
-                    "type": "grammar",
-                    "create_date": create_date,
-                }
-            )
+                
+                # 根据类型分类
+                if expr.type == "style":
+                    learnt_style_expressions.append(expr_data)
+                elif expr.type == "grammar":
+                    learnt_grammar_expressions.append(expr_data)
+        
         return learnt_style_expressions, learnt_grammar_expressions
 
     async def _apply_global_decay_to_database(self, current_time: float) -> None:
         """
         对数据库中的所有表达方式应用全局衰减
+        
+        优化: 批量处理所有更改，最后统一提交，避免逐条提交
         """
         try:
             async with get_db_session() as session:
@@ -289,6 +283,7 @@ class ExpressionLearner:
                 updated_count = 0
                 deleted_count = 0
 
+                # 优化: 批量处理所有修改
                 for expr in all_expressions:
                     # 计算时间差
                     last_active = expr.last_active_time
@@ -301,14 +296,15 @@ class ExpressionLearner:
                     if new_count <= 0.01:
                         # 如果count太小，删除这个表达方式
                         await session.delete(expr)
-                    await session.commit()
                         deleted_count += 1
                     else:
                         # 更新count
                         expr.count = new_count
                         updated_count += 1
 
+                # 优化: 统一提交所有更改（从N次提交减少到1次）
                 if updated_count > 0 or deleted_count > 0:
+                    await session.commit()
                     logger.info(f"全局衰减完成：更新了 {updated_count} 个表达方式，删除了 {deleted_count} 个表达方式")
 
         except Exception as e:

src/chat/message_receive/storage.py

@@ -1,6 +1,8 @@
+import asyncio
 import re
 import time
 import traceback
+from collections import deque
 
 import orjson
 from sqlalchemy import desc, select, update
@@ -16,6 +18,102 @@ from .message import MessageSending
 logger = get_logger("message_storage")
 
 
+class MessageUpdateBatcher:
+    """
+    消息更新批处理器
+    
+    优化: 将多个消息ID更新操作批量处理，减少数据库连接次数
+    """
+    
+    def __init__(self, batch_size: int = 20, flush_interval: float = 2.0):
+        self.batch_size = batch_size
+        self.flush_interval = flush_interval
+        self.pending_updates: deque = deque()
+        self._lock = asyncio.Lock()
+        self._flush_task = None
+        
+    async def start(self):
+        """启动自动刷新任务"""
+        if self._flush_task is None:
+            self._flush_task = asyncio.create_task(self._auto_flush_loop())
+            logger.debug("消息更新批处理器已启动")
+    
+    async def stop(self):
+        """停止批处理器"""
+        if self._flush_task:
+            self._flush_task.cancel()
+            try:
+                await self._flush_task
+            except asyncio.CancelledError:
+                pass
+            self._flush_task = None
+        
+        # 刷新剩余的更新
+        await self.flush()
+        logger.debug("消息更新批处理器已停止")
+    
+    async def add_update(self, mmc_message_id: str, qq_message_id: str):
+        """添加消息ID更新到批处理队列"""
+        async with self._lock:
+            self.pending_updates.append((mmc_message_id, qq_message_id))
+            
+            # 如果达到批量大小，立即刷新
+            if len(self.pending_updates) >= self.batch_size:
+                await self.flush()
+    
+    async def flush(self):
+        """执行批量更新"""
+        async with self._lock:
+            if not self.pending_updates:
+                return
+            
+            updates = list(self.pending_updates)
+            self.pending_updates.clear()
+        
+        try:
+            async with get_db_session() as session:
+                updated_count = 0
+                for mmc_id, qq_id in updates:
+                    result = await session.execute(
+                        update(Messages)
+                        .where(Messages.message_id == mmc_id)
+                        .values(message_id=qq_id)
+                    )
+                    if result.rowcount > 0:
+                        updated_count += 1
+                
+                await session.commit()
+                
+                if updated_count > 0:
+                    logger.debug(f"批量更新了 {updated_count}/{len(updates)} 条消息ID")
+        
+        except Exception as e:
+            logger.error(f"批量更新消息ID失败: {e}")
+    
+    async def _auto_flush_loop(self):
+        """自动刷新循环"""
+        while True:
+            try:
+                await asyncio.sleep(self.flush_interval)
+                await self.flush()
+            except asyncio.CancelledError:
+                break
+            except Exception as e:
+                logger.error(f"自动刷新出错: {e}")
+
+
+# 全局批处理器实例
+_message_update_batcher = None
+
+
+def get_message_update_batcher() -> MessageUpdateBatcher:
+    """获取全局消息更新批处理器"""
+    global _message_update_batcher
+    if _message_update_batcher is None:
+        _message_update_batcher = MessageUpdateBatcher()
+    return _message_update_batcher
+
+
 class MessageStorage:
     @staticmethod
     def _serialize_keywords(keywords) -> str:
@@ -216,8 +314,16 @@ class MessageStorage:
             traceback.print_exc()
 
     @staticmethod
-    async def update_message(message_data: dict):
-        """更新消息ID（从消息字典）"""
+    async def update_message(message_data: dict, use_batch: bool = True):
+        """
+        更新消息ID（从消息字典）
+        
+        优化: 添加批处理选项，将多个更新操作合并，减少数据库连接
+        
+        Args:
+            message_data: 消息数据字典
+            use_batch: 是否使用批处理（默认True）
+        """
         try:
             # 从字典中提取信息
             message_info = message_data.get("message_info", {})
@@ -255,7 +361,13 @@ class MessageStorage:
                 logger.debug(f"消息段数据: {segment_data}")
                 return
 
-            # 使用上下文管理器确保session正确管理
+            # 优化: 使用批处理器减少数据库连接
+            if use_batch:
+                batcher = get_message_update_batcher()
+                await batcher.add_update(mmc_message_id, qq_message_id)
+                logger.debug(f"消息ID更新已加入批处理队列: {mmc_message_id} -> {qq_message_id}")
+            else:
+                # 直接更新（保留原有逻辑用于特殊情况）
                 from src.common.database.sqlalchemy_models import get_db_session
 
                 async with get_db_session() as session: