更新

backend/models/models.py

@@ -1,7 +1,8 @@
 from datetime import datetime
-from sqlalchemy import Column, Integer, String, Boolean, DateTime, ForeignKey, Text, UniqueConstraint
-from sqlalchemy.orm import relationship
+from sqlalchemy import Column, Integer, String, Boolean, DateTime, ForeignKey, Index, Text, UniqueConstraint
+from sqlalchemy.orm import relationship, validates
 from .database import Base
+from utils.log_limits import bound_error_log_content, bound_message_log_content
 
 
 class User(Base):
@@ -204,10 +205,23 @@ class MessageLog(Base):
     reply_content = Column(Text, nullable=True)                                                # 回复的消息
     status = Column(String(50), default="received")                                            # received, replied, ignored, failed
     error_message = Column(Text, nullable=True)
-    created_at = Column(DateTime, default=datetime.utcnow)
+    created_at = Column(DateTime, default=datetime.utcnow, index=True)
 
     account = relationship("Account", back_populates="logs")
 
+    __table_args__ = (
+        Index("ix_message_logs_account_created_at", "account_id", "created_at"),
+        Index("ix_message_logs_status_account_id", "status", "account_id"),
+    )
+
+    @validates("message_content", "reply_content")
+    def _bound_message_content(self, _key, value):
+        return bound_message_log_content(value) if value is not None else None
+
+    @validates("error_message")
+    def _bound_error_content(self, _key, value):
+        return bound_error_log_content(value) if value is not None else None
+
 
 class ReceivedMessageLog(Base):
     """接收消息原始日志：仅记录收到的消息，内容原样保存。"""
@@ -225,6 +239,14 @@ class ReceivedMessageLog(Base):
     raw_content = Column(Text, nullable=False)
     created_at = Column(DateTime, default=datetime.utcnow, index=True)
 
+    __table_args__ = (
+        Index(
+            "ix_received_message_logs_account_created_at",
+            "account_id",
+            "created_at",
+        ),
+    )
+
 
 class FollowWelcomeLog(Base):
     """关注欢迎语去重表：每个账号对每个新粉丝只发送一次欢迎语（重启后仍生效）。"""
@@ -255,6 +277,10 @@ class SystemLog(Base):
     detail = Column(Text, nullable=True)                                                        # 详细原因
     created_at = Column(DateTime, default=datetime.utcnow, index=True)
 
+    __table_args__ = (
+        Index("ix_system_logs_account_created_at", "account_id", "created_at"),
+    )
+
 
 class PaymentOrder(Base):
     """账号额度购买订单。"""