支持自定义API接口

backend/app/models/settings.py

@@ -1,5 +1,5 @@
 """设置数据模型"""
-from sqlalchemy import Column, String, Text, Float, Integer, DateTime
+from sqlalchemy import Column, String, Text, Float, Integer, DateTime, Index
 from sqlalchemy.sql import func
 from app.database import Base
 import uuid
@@ -10,6 +10,7 @@ class Settings(Base):
     __tablename__ = "settings"
     
     id = Column(String(36), primary_key=True, default=lambda: str(uuid.uuid4()))
+    user_id = Column(String(50), nullable=False, unique=True, index=True, comment="用户ID")
     api_provider = Column(String(50), default="openai", comment="API提供商")
     api_key = Column(String(500), comment="API密钥")
     api_base_url = Column(String(500), comment="自定义API地址")
@@ -20,5 +21,9 @@ class Settings(Base):
     created_at = Column(DateTime, server_default=func.now(), comment="创建时间")
     updated_at = Column(DateTime, server_default=func.now(), onupdate=func.now(), comment="更新时间")
     
+    __table_args__ = (
+        Index('idx_user_id', 'user_id'),
+    )
+    
     def __repr__(self):
-        return f"<Settings(id={self.id}, api_provider={self.api_provider})>"
+        return f"<Settings(id={self.id}, user_id={self.user_id}, api_provider={self.api_provider})>"