invoice payment! prerelease

db/models/invoices.py

@@ -9,6 +9,7 @@ from db.base import Base
 
 class InvoiceStatus(E_cls):
     PENDING = "PENDING"
+    RECEIVED = "RECEIVED"
     PAID = "PAID"
     EXPIRED = "EXPIRED"
 

db/models/orders.py

@@ -29,7 +29,7 @@ class OrderItem(Base):
     __tablename__ = "order_items"
 
     id: Mapped[int] = mapped_column(primary_key=True, autoincrement=True)
-    order_id: Mapped[int] = mapped_column(ForeignKey("orders.id"))
+    order_id: Mapped[int] = mapped_column(ForeignKey("orders.id", ondelete="CASCADE"))
     product_id: Mapped[int] = mapped_column(ForeignKey("products.id"))
     quantity: Mapped[int] = mapped_column(default=1)