first commit

backend/app/models/sample.py

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+from sqlalchemy import Column, Integer, String, DateTime
+from sqlalchemy.sql import func
+from app.models import Base
+from app.config import TABLE_PREFIX
+
+class SampleRecord(Base):
+    __tablename__ = f"{TABLE_PREFIX}Sample_Records"
+
+    id = Column(Integer, primary_key=True, index=True)
+    sample_id = Column(String(50), unique=True, index=True, nullable=False)
+    order_no = Column(String(50), index=True)
+    oppy_no = Column(String(100), index=True) # AU 欄
+    cust_id = Column(String(100), index=True) # G 欄
+    customer = Column(String(255), nullable=False, index=True)
+    customer_normalized = Column(String(255), index=True)
+    pn = Column(String(100), nullable=False, index=True)
+    qty = Column(Integer, default=0)
+    date = Column(String(20))
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), onupdate=func.now())