Phase 1: scaffold local backend — models, schemas, routers, printer service, Docker

local_backend/models/product.py

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+from sqlalchemy import Column, Integer, String, Boolean, Float, ForeignKey
+from sqlalchemy.orm import relationship
+from database import Base
+
+
+class Category(Base):
+    __tablename__ = "categories"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, nullable=False)
+    color = Column(String, nullable=True)
+    sort_order = Column(Integer, default=0)
+
+    products = relationship("Product", back_populates="category")
+
+
+class Product(Base):
+    __tablename__ = "products"
+
+    id = Column(Integer, primary_key=True, index=True)
+    name = Column(String, nullable=False)
+    category_id = Column(Integer, ForeignKey("categories.id"), nullable=True)
+    base_price = Column(Float, nullable=False)
+    is_available = Column(Boolean, default=True, nullable=False)
+    printer_zone_id = Column(Integer, ForeignKey("printers.id"), nullable=True)
+
+    category = relationship("Category", back_populates="products")
+    printer_zone = relationship("Printer", back_populates="products")
+    options = relationship("ProductOption", back_populates="product", cascade="all, delete-orphan")
+    ingredients = relationship("ProductIngredient", back_populates="product", cascade="all, delete-orphan")
+    order_items = relationship("OrderItem", back_populates="product")
+
+
+class ProductOption(Base):
+    __tablename__ = "product_options"
+
+    id = Column(Integer, primary_key=True, index=True)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False)
+    name = Column(String, nullable=False)
+    extra_cost = Column(Float, default=0.0)
+
+    product = relationship("Product", back_populates="options")
+
+
+class ProductIngredient(Base):
+    __tablename__ = "product_ingredients"
+
+    id = Column(Integer, primary_key=True, index=True)
+    product_id = Column(Integer, ForeignKey("products.id"), nullable=False)
+    name = Column(String, nullable=False)
+
+    product = relationship("Product", back_populates="ingredients")