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backend-fastapi/core/code_generator/model.py

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+#!/usr/bin/env python
+# -*- coding: utf-8 -*-
+"""
+编码生成器数据模型
+"""
+from sqlalchemy import Column, String, Integer, Index
+from app.base_model import BaseModel
+
+
+class CodeSequence(BaseModel):
+    """编码序号表"""
+    __tablename__ = "code_sequence"
+
+    business_type = Column(String(100), nullable=False, comment="业务类型")
+    prefix = Column(String(50), default="", comment="前缀")
+    date_key = Column(String(20), default="", comment="日期键（用于按日期重置）")
+    current_seq = Column(Integer, default=0, comment="当前序号")
+    
+    __table_args__ = (
+        Index('idx_business_prefix_date', 'business_type', 'prefix', 'date_key'),
+    )