wahnsinn vibe

backend/apps/cart/models.py

@@ -0,0 +1,30 @@
+from datetime import datetime
+
+from sqlalchemy import DateTime, ForeignKey, Integer, UniqueConstraint, func
+from sqlalchemy.orm import Mapped, mapped_column, relationship
+
+from core.db import Base
+
+
+class Cart(Base):
+    __tablename__ = "carts"
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    user_id: Mapped[int] = mapped_column(ForeignKey("users.id", ondelete="CASCADE"), unique=True)
+    created_at: Mapped[datetime] = mapped_column(DateTime(timezone=True), server_default=func.now())
+
+    items: Mapped[list["CartItem"]] = relationship(
+        "CartItem", back_populates="cart", cascade="all, delete-orphan", lazy="joined"
+    )
+
+
+class CartItem(Base):
+    __tablename__ = "cart_items"
+    __table_args__ = (UniqueConstraint("cart_id", "product_id", name="uq_cart_product"),)
+
+    id: Mapped[int] = mapped_column(Integer, primary_key=True, autoincrement=True)
+    cart_id: Mapped[int] = mapped_column(ForeignKey("carts.id", ondelete="CASCADE"))
+    product_id: Mapped[int] = mapped_column(ForeignKey("products.id", ondelete="CASCADE"))
+    qty: Mapped[int] = mapped_column(Integer, default=1)
+
+    cart: Mapped["Cart"] = relationship("Cart", back_populates="items")