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}}
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_coupon {
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_coupon": {
"code": "H20"
},
"prices": {
"grand_total": {
"value": 134.08,
"currency": "USD"
}
}
}
}
}
}
Input attributes
The applyCouponToCart mutation requires the cart_id and coupon_code.
ApplyCouponToCartInput object
The ApplyCouponToCartInput object must contain the following attributes:
| Attribute | Data Type | Description |
|---|---|---|
cart_id |
String! | The unique ID that identifies the customer’s cart |
coupon_code |
String! | A valid coupon code |
Output attributes
The ApplyCouponToCartOutput object contains the Cart object.
| Attribute | Data Type | Description |
|---|---|---|
cart |
Cart! | Describes the contents of the specified shopping cart |
Cart object
| Attribute | Data Type | Description |
|---|---|---|
applied_coupon |
AppliedCoupon |
Deprecated. Use applied_coupons instead |
applied_coupons |
[AppliedCoupon] |
An array of AppliedCoupon objects. Each object contains the code text attribute, which specifies the coupon code |
applied_gift_cards |
[AppliedGiftCard] |
An array of AppliedGiftCard objects. An AppliedGiftCard object contains the code text attribute, which specifies the gift card code. applied_gift_cards is a Commerce-only attribute, defined in the GiftCardAccountGraphQl module |
applied_store_credit |
AppliedStoreCredit |
Contains store credit information applied to the cart. applied_store_credit is a Commerce-only attribute, defined in the CustomerBalanceGraphQl module |
available_payment_methods |
[AvailablePaymentMethod] | Available payment methods |
billing_address |
BillingCartAddress | Contains the billing address specified in the customer’s cart |
email |
String | The customer’s email address |
id |
ID! | The ID of the cart |
is_virtual |
Boolean | Indicates whether the cart contains only virtual products |
items |
[CartItemInterface] | Contains the items in the customer’s cart |
prices |
CartPrices | Contains subtotals and totals |
selected_payment_method |
SelectedPaymentMethod | Selected payment method |
shipping_addresses |
[ShippingCartAddress]! | Contains one or more shipping addresses |
Cart query output provides more information about the Cart object.
Errors
| Error | Description |
|---|---|
A coupon is already applied to the cart. Please remove it to apply another |
The value specified in the coupon_code attribute 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 attribute 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. |
