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backend/app/models/object_photo.py

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+import uuid
+from datetime import datetime
+from typing import TYPE_CHECKING
+
+from sqlalchemy import DateTime, ForeignKey, Integer, String, func
+from sqlalchemy.dialects.postgresql import UUID
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from app.db.base import Base
+
+if TYPE_CHECKING:
+    from app.models.object import InventoryObject
+
+
+class ObjectPhoto(Base):
+    __tablename__ = "object_photos"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    object_id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("objects.id", ondelete="CASCADE"), nullable=False, index=True
+    )
+    storage_key: Mapped[str] = mapped_column(String(512), nullable=False)
+    content_type: Mapped[str] = mapped_column(String(128), nullable=False)
+    position: Mapped[int] = mapped_column(Integer, nullable=False, default=0)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+
+    object: Mapped["InventoryObject"] = relationship(back_populates="photos")