首次提交by MimoCode

backend/app/models/batch.py

@@ -0,0 +1,23 @@
+from sqlalchemy import Column, Integer, String, Date, Boolean, ForeignKey, DateTime
+from sqlalchemy.orm import relationship
+from datetime import datetime
+
+from app.database import Base
+
+
+class Batch(Base):
+    __tablename__ = "batches"
+
+    id = Column(Integer, primary_key=True, index=True)
+    medicine_id = Column(Integer, ForeignKey("medicines.id"), nullable=False, index=True)
+    batch_no = Column(String(100))
+    production_date = Column(Date)
+    expiry_date = Column(Date, nullable=False)
+    quantity = Column(Integer, nullable=False, default=0)
+    location = Column(String(200))
+    is_expired = Column(Boolean, default=False)
+    created_at = Column(DateTime, default=datetime.utcnow)
+    updated_at = Column(DateTime, default=datetime.utcnow, onupdate=datetime.utcnow)
+
+    medicine = relationship("Medicine", back_populates="batches")
+    audit_logs = relationship("AuditLog", back_populates="batch")