first commit

backend/app/models.py

@@ -0,0 +1,24 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, Integer, String, Text
+from sqlalchemy.orm import Mapped, mapped_column
+
+from app.database import Base
+
+
+class Mindmap(Base):
+    __tablename__ = "mindmaps"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, index=True)
+    unique_id: Mapped[str] = mapped_column(
+        String(32), unique=True, index=True, nullable=False
+    )
+    session_id: Mapped[str] = mapped_column(String(255), nullable=False)
+    title: Mapped[str] = mapped_column(String(255), nullable=False)
+    raw_json: Mapped[str] = mapped_column(Text, nullable=False)
+    created_at: Mapped[datetime] = mapped_column(
+        DateTime, default=datetime.utcnow, nullable=False
+    )
+    updated_at: Mapped[datetime] = mapped_column(
+        DateTime, default=datetime.utcnow, onupdate=datetime.utcnow, nullable=False
+    )