initial

backend/app/models/activity.py

@@ -0,0 +1,30 @@
+from datetime import datetime
+from enum import Enum
+from sqlalchemy import String, DateTime, ForeignKey, JSON
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.core.database import Base
+
+
+class ActivityType(str, Enum):
+    JOIN = "join"
+    SPIN = "spin"
+    COMPLETE = "complete"
+    DROP = "drop"
+    START_MARATHON = "start_marathon"
+    FINISH_MARATHON = "finish_marathon"
+
+
+class Activity(Base):
+    __tablename__ = "activities"
+
+    id: Mapped[int] = mapped_column(primary_key=True)
+    marathon_id: Mapped[int] = mapped_column(ForeignKey("marathons.id", ondelete="CASCADE"), index=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"))
+    type: Mapped[str] = mapped_column(String(30), nullable=False)
+    data: Mapped[dict | None] = mapped_column(JSON, nullable=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, index=True)
+
+    # Relationships
+    marathon: Mapped["Marathon"] = relationship("Marathon", back_populates="activities")
+    user: Mapped["User"] = relationship("User")