Step 11：百问百答（FAQ / Knowledge Base）

backend/app/models/faq_item.py

@@ -0,0 +1,26 @@
+import uuid
+from datetime import datetime
+
+from sqlalchemy import Boolean, 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 FaqItem(Base):
+    __tablename__ = "faq_items"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    study_id: Mapped[uuid.UUID | None] = mapped_column(UUID(as_uuid=True), ForeignKey("studies.id"), nullable=True, index=True)
+    category_id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), ForeignKey("faq_categories.id"), index=True, nullable=False)
+    question: Mapped[str] = mapped_column(Text, nullable=False)
+    answer: Mapped[str] = mapped_column(Text, nullable=False)
+    keywords: Mapped[str | None] = mapped_column(String(255), nullable=True)
+    version: Mapped[int] = mapped_column(Integer, nullable=False, default=1)
+    is_active: Mapped[bool] = mapped_column(Boolean, nullable=False, default=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())
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime(timezone=True), nullable=False, server_default=func.now(), onupdate=func.now()
+    )