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applyCouponToCart mutation

The applyCouponToCart mutation applies a pre-defined coupon code to the specified cart. Valid coupon codes are defined in cart price rules.

Syntax

mutation: {applyCouponToCart(input: ApplyCouponToCartInput) {ApplyCouponToCartOutput}}

Reference

The applyCouponToCart reference provides detailed information about the types and fields defined in this mutation.

Example usage

The following example applies the coupon code H2O to the cart. For this coupon to be valid, the Affirm Water Bottle (sku: 24-UG06) must be in the cart.

Request:

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mutation {
applyCouponToCart(
input: {
cart_id: "IeTUiU0oCXjm0uRqGCOuhQ2AuQatogjG",
coupon_code: "H20"
}
) {
cart {
items {
product {
name
}
quantity
}
applied_coupons {
code
}
prices {
grand_total{
value
currency
}
}
}
}
}

Response:

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{
"data": {
"applyCouponToCart": {
"cart": {
"items": [
{
"product": {
"name": "Gold Membership"
},
"quantity": 2
},
{
"product": {
"name": "Strive Shoulder Pack"
},
"quantity": 1
},
{
"product": {
"name": "Affirm Water Bottle "
},
"quantity": 1
}
],
"applied_coupons": {
"code": "H20"
},
"prices": {
"grand_total": {
"value": 134.08,
"currency": "USD"
}
}
}
}
}
}

Errors

ErrorDescription
A coupon is already applied to the cart. Please remove it to apply another
The value specified in the coupon_code argument has already applied to cart. Use removeCouponFromCart to remove the current coupon and to apply another.
Cart does not contain products.
The coupon cannot be applied to an empty cart.
Could not find a cart with ID "XXX"
The specified cart_id value does not exist in the quote_id_mask table.
Required parameter "coupon_code" is missing
The required coupon_code argument contains an empty value.
The coupon code isn't valid. Verify the code and try again.
The entered coupon code is not applicable. Check the existing shopping cart price rules for details.
The current user cannot perform operations on cart XXX
An unauthorized user (guest) tried to add the product into a customer's cart, or an authorized user (customer) tried to add the product into the cart of another customer.
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