feat: initial commit

backend/app/models/material_alias.py

@@ -0,0 +1,19 @@
+import uuid
+from datetime import datetime
+from sqlalchemy import String, DateTime, ForeignKey
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+from sqlalchemy.dialects.postgresql import UUID
+from app.database import Base
+
+
+class MaterialAlias(Base):
+    __tablename__ = "material_aliases"
+
+    id: Mapped[uuid.UUID] = mapped_column(UUID(as_uuid=True), primary_key=True, default=uuid.uuid4)
+    material_id: Mapped[uuid.UUID] = mapped_column(
+        UUID(as_uuid=True), ForeignKey("materials.id", ondelete="CASCADE"), nullable=False
+    )
+    alias: Mapped[str] = mapped_column(String(300), nullable=False)
+    created_at: Mapped[datetime] = mapped_column(DateTime, default=datetime.utcnow, nullable=False)
+
+    material = relationship("Material", back_populates="aliases")