Step 9：药品管理（IMP）

backend/app/models/imp_transaction.py

@@ -0,0 +1,25 @@
+import uuid
+from datetime import datetime, date
+
+from sqlalchemy import Date, DateTime, ForeignKey, Integer, String, Text, func
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.db.base_class import Base
+
+
+class ImpTransaction(Base):
+    __tablename__ = "imp_transactions"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    study_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("studies.id"), index=True, nullable=False)
+    site_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("sites.id"), index=True, nullable=False)
+    batch_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("imp_batches.id"), index=True, nullable=False)
+    subject_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("subjects.id"), nullable=True)
+    tx_type: Mapped[str] = mapped_column(String(20), nullable=False)
+    quantity: Mapped[int] = mapped_column(Integer, nullable=False)
+    tx_date: Mapped[date] = mapped_column(Date, nullable=False)
+    reference: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    notes: Mapped[str | None] = mapped_column(Text, nullable=True)
+    created_by: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("users.id"), nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), nullable=False, server_default=func.now())