I want to expand a cart line when I have only one eligible entry cart line (tag matches, quantity is odd), to add the cart line at the original price and another at a discounted price.
My original cart had only one entry with quantity of three.
This is what I am getting in my checkout:
And here is part of the function:
function optionallyAddExpandOperation(
{ id: cartLineId, merchandise, cost }
) {
return {
cartLineId,
title: `${merchandise.title} added`,
// Optionally override the image for line item
// image: { url: "https://cdn.shopify.com/.../something.png" },
expandedCartItems: [
{
merchandiseId: "gid://shopify/ProductVariant/1234",
quantity: 1,
price: {
adjustment: {
fixedPricePerUnit: {
amount: "48.99"
}
}
}
},
{
merchandiseId: "gid://shopify/ProductVariant/1234",
quantity: 2,
price: {
adjustment: {
fixedPricePerUnit: {
amount: "12.50"
}
}
}
}
]
};
return null;
}
And here is where it is called:
const operations = input.cart.lines.reduce(
/** @param {CartOperation[]} acc */
(acc, cartLine) => {
const plusOperation = optionallyAddExpandOperation(
cartLine
);
if (plusOperation) {
return [...acc, { expand: plusOperation }];
}
return acc;
},
[]
);
return operations.length > 0 ? { operations } : NO_CHANGES;
I’ve looked at https://shopify.dev/docs/api/functions/reference/cart-transform/graphql#extension-targets
And it would seem to imply I can add quantities, not have them multiplied by the original cart line as show in the checkout screenshot.
Can someone help me out on this one?