new init

apps/backend/app/models/product.py

@@ -0,0 +1,31 @@
+from sqlalchemy import Column, Integer, String, Boolean, DateTime
+from sqlalchemy.sql import func
+from sqlalchemy.orm import relationship
+from app.core.database import Base
+
+class Product(Base):
+    __tablename__ = "products"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, nullable=False, unique=True, index=True)
+    category = Column(String, nullable=True, index=True)
+    volume_ml = Column(Integer, nullable=False)
+    price_cents = Column(Integer, nullable=False)
+    supplier_number = Column(String, nullable=True)
+    image_url = Column(String, nullable=True)
+
+    stock = Column(Integer, nullable=False, default=0)
+    is_active = Column(Boolean, default=True)
+
+    created_at = Column(DateTime(timezone=True), server_default=func.now())
+    updated_at = Column(DateTime(timezone=True), server_default=func.now(), onupdate=func.now())
+
+    pack_size = Column(Integer, nullable=False, default=1)             # z.B. 6, 12, 24
+    purchase_price_cents = Column(Integer, nullable=False, default=0) 
+    # >>> NEU: Gegenbeziehung zur Delivery-Relation
+    deliveries = relationship(
+        "Delivery",
+        back_populates="product",
+        cascade="all, delete-orphan",
+        lazy="selectin",
+    )