add backend source code

backend/app/models/finance.py

@@ -0,0 +1,78 @@
+"""
+财务核算模型模块
+"""
+from datetime import datetime
+from typing import Optional, List
+from sqlalchemy import (
+    String, Text, Integer, Numeric, Boolean, DateTime, ForeignKey, Enum as SQLEnum,
+    Index, CheckConstraint
+)
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from enum import Enum
+
+from app.core.database import Base
+
+
+class RevenueCategory(str, Enum):
+    """收入类别"""
+    EXAMINATION = "examination"  # 检查费
+    LAB_TEST = "lab_test"        # 检验费
+    RADIOLOGY = "radiology"      # 放射费
+    BED = "bed"                  # 床位费
+    NURSING = "nursing"          # 护理费
+    TREATMENT = "treatment"      # 治疗费
+    SURGERY = "surgery"          # 手术费
+    INJECTION = "injection"      # 注射费
+    OXYGEN = "oxygen"            # 吸氧费
+    OTHER = "other"              # 其他
+
+
+class ExpenseCategory(str, Enum):
+    """支出类别"""
+    MATERIAL = "material"        # 材料费
+    PERSONNEL = "personnel"      # 人员支出
+    MAINTENANCE = "maintenance"  # 维修费
+    UTILITY = "utility"          # 水电费
+    OTHER = "other"              # 其他
+
+
+class FinanceType(str, Enum):
+    """财务类型"""
+    REVENUE = "revenue"          # 收入
+    EXPENSE = "expense"          # 支出
+
+
+class DepartmentFinance(Base):
+    """科室财务记录"""
+    __tablename__ = "department_finances"
+    
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    department_id: Mapped[int] = mapped_column(ForeignKey("departments.id"), nullable=False, comment="科室ID")
+    period_year: Mapped[int] = mapped_column(Integer, nullable=False, comment="年度")
+    period_month: Mapped[int] = mapped_column(Integer, nullable=False, comment="月份")
+    finance_type: Mapped[FinanceType] = mapped_column(
+        SQLEnum(FinanceType, values_callable=lambda x: [e.value for e in x]),
+        nullable=False,
+        comment="财务类型"
+    )
+    category: Mapped[str] = mapped_column(String(50), nullable=False, comment="类别")
+    amount: Mapped[float] = mapped_column(Numeric(12, 2), default=0, comment="金额")
+    source: Mapped[Optional[str]] = mapped_column(String(100), nullable=True, comment="数据来源")
+    remark: Mapped[Optional[str]] = mapped_column(Text, nullable=True, comment="备注")
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, comment="创建时间")
+    updated_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, comment="更新时间")
+    
+    # 关系
+    department: Mapped["Department"] = relationship("Department", backref="finances")
+    
+    __table_args__ = (
+        Index("idx_finance_dept", "department_id"),
+        Index("idx_finance_period", "period_year", "period_month"),
+        Index("idx_finance_type", "finance_type"),
+        Index("idx_finance_category", "category"),
+        CheckConstraint("amount >= 0", name="ck_finance_amount"),
+    )
+
+
+# 为了避免循环导入，在models.py中导入时使用
+from app.models.models import Department  # noqa