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discountAutomaticBxgyUpdate

mutation

Requires Apps must have write_discounts access scope.

Updates an existing buy X get Y discount (BXGY) that's automatically applied on a cart and at checkout.

Note

To update code discounts, use the discountCodeBxgyUpdate mutation instead.

Anchor to Arguments

Arguments

Anchor to automaticBxgyDiscountautomaticBxgyDiscount •DiscountAutomaticBxgyInput! required: The input data used to update the automatic BXGY discount.
Anchor to idid •ID! required: The ID of the automatic BXGY discount to update.

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Anchor to DiscountAutomaticBxgyUpdatePayload returnsDiscountAutomaticBxgyUpdatePayload returns

Anchor to automaticDiscountNodeautomaticDiscountNode •DiscountAutomaticNode: The automatic discount that was updated.
Anchor to userErrorsuserErrors •[DiscountUserError!]! non-null: The list of errors that occurred from executing the mutation.

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Examples

Update an automatic BXGY discount

Description

Update an automatic [BXGY discount](https://help.shopify.com/manual/discounts/discount-types/buy-x-get-y) that gives customers a free product when they buy a different product. This example updates the discount's title, sets new start and end dates, and specifies which products customers need to buy and which products they get for free.

Query

mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
  discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
    automaticDiscountNode {
      id
      automaticDiscount {
        ... on DiscountAutomaticBxgy {
          title
          startsAt
          endsAt
        }
      }
    }
    userErrors {
      field
      message
    }
  }
}

Variables

{
  "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
  "automaticBxgyDiscount": {
    "title": "Buy first product, get second product free",
    "startsAt": "2025-01-01T00:00:00Z",
    "endsAt": "2025-12-31T23:59:59Z",
    "customerBuys": {
      "items": {
        "products": {
          "productsToAdd": [
            "gid://shopify/Product/108828309"
          ]
        }
      },
      "value": {
        "quantity": "1"
      }
    },
    "customerGets": {
      "items": {
        "products": {
          "productsToAdd": [
            "gid://shopify/Product/20995642"
          ]
        }
      },
      "value": {
        "discountOnQuantity": {
          "quantity": "1",
          "effect": {
            "percentage": 1
          }
        }
      }
    },
    "usesPerOrderLimit": "1"
  }
}

cURL

curl -X POST \
https://your-development-store.myshopify.com/admin/api/2025-07/graphql.json \
-H 'Content-Type: application/json' \
-H 'X-Shopify-Access-Token: {access_token}' \
-d '{
"query": "mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) { discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) { automaticDiscountNode { id automaticDiscount { ... on DiscountAutomaticBxgy { title startsAt endsAt } } } userErrors { field message } } }",
 "variables": {
    "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
    "automaticBxgyDiscount": {
      "title": "Buy first product, get second product free",
      "startsAt": "2025-01-01T00:00:00Z",
      "endsAt": "2025-12-31T23:59:59Z",
      "customerBuys": {
        "items": {
          "products": {
            "productsToAdd": [
              "gid://shopify/Product/108828309"
            ]
          }
        },
        "value": {
          "quantity": "1"
        }
      },
      "customerGets": {
        "items": {
          "products": {
            "productsToAdd": [
              "gid://shopify/Product/20995642"
            ]
          }
        },
        "value": {
          "discountOnQuantity": {
            "quantity": "1",
            "effect": {
              "percentage": 1
            }
          }
        }
      },
      "usesPerOrderLimit": "1"
    }
  }
}'

React Router

import { authenticate } from "../shopify.server";

export const loader = async ({request}) => {
  const { admin } = await authenticate.admin(request);
  const response = await admin.graphql(
    `#graphql
  mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
    discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
      automaticDiscountNode {
        id
        automaticDiscount {
          ... on DiscountAutomaticBxgy {
            title
            startsAt
            endsAt
          }
        }
      }
      userErrors {
        field
        message
      }
    }
  }`,
  {
    variables: {
        "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
        "automaticBxgyDiscount": {
            "title": "Buy first product, get second product free",
            "startsAt": "2025-01-01T00:00:00Z",
            "endsAt": "2025-12-31T23:59:59Z",
            "customerBuys": {
                "items": {
                    "products": {
                        "productsToAdd": [
                            "gid://shopify/Product/108828309"
                        ]
                    }
                },
                "value": {
                    "quantity": "1"
                }
            },
            "customerGets": {
                "items": {
                    "products": {
                        "productsToAdd": [
                            "gid://shopify/Product/20995642"
                        ]
                    }
                },
                "value": {
                    "discountOnQuantity": {
                        "quantity": "1",
                        "effect": {
                            "percentage": 1
                        }
                    }
                }
            },
            "usesPerOrderLimit": "1"
        }
    },
  },
  );
  const json = await response.json();
  return json.data;
}

Ruby

session = ShopifyAPI::Auth::Session.new(
  shop: "your-development-store.myshopify.com",
  access_token: access_token
)
client = ShopifyAPI::Clients::Graphql::Admin.new(
  session: session
)

query = <<~QUERY
  mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
    discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
      automaticDiscountNode {
        id
        automaticDiscount {
          ... on DiscountAutomaticBxgy {
            title
            startsAt
            endsAt
          }
        }
      }
      userErrors {
        field
        message
      }
    }
  }
QUERY

variables = {
  "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
  "automaticBxgyDiscount": {
    "title": "Buy first product, get second product free",
    "startsAt": "2025-01-01T00:00:00Z",
    "endsAt": "2025-12-31T23:59:59Z",
    "customerBuys": {
      "items": {
        "products": {
          "productsToAdd": [
            "gid://shopify/Product/108828309"
          ]
        }
      },
      "value": {
        "quantity": "1"
      }
    },
    "customerGets": {
      "items": {
        "products": {
          "productsToAdd": [
            "gid://shopify/Product/20995642"
          ]
        }
      },
      "value": {
        "discountOnQuantity": {
          "quantity": "1",
          "effect": {
            "percentage": 1
          }
        }
      }
    },
    "usesPerOrderLimit": "1"
  }
}

response = client.query(query: query, variables: variables)

Node.js

const client = new shopify.clients.Graphql({session});
const data = await client.query({
  data: {
    "query": `mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
      discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
        automaticDiscountNode {
          id
          automaticDiscount {
            ... on DiscountAutomaticBxgy {
              title
              startsAt
              endsAt
            }
          }
        }
        userErrors {
          field
          message
        }
      }
    }`,
    "variables": {
        "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
        "automaticBxgyDiscount": {
            "title": "Buy first product, get second product free",
            "startsAt": "2025-01-01T00:00:00Z",
            "endsAt": "2025-12-31T23:59:59Z",
            "customerBuys": {
                "items": {
                    "products": {
                        "productsToAdd": [
                            "gid://shopify/Product/108828309"
                        ]
                    }
                },
                "value": {
                    "quantity": "1"
                }
            },
            "customerGets": {
                "items": {
                    "products": {
                        "productsToAdd": [
                            "gid://shopify/Product/20995642"
                        ]
                    }
                },
                "value": {
                    "discountOnQuantity": {
                        "quantity": "1",
                        "effect": {
                            "percentage": 1
                        }
                    }
                }
            },
            "usesPerOrderLimit": "1"
        }
    },
  },
});

Response

{
  "discountAutomaticBxgyUpdate": {
    "automaticDiscountNode": {
      "id": "gid://shopify/DiscountAutomaticNode/198286294",
      "automaticDiscount": {
        "title": "Buy first product, get second product free",
        "startsAt": "2025-01-01T00:00:00Z",
        "endsAt": "2025-12-31T23:59:59Z"
      }
    },
    "userErrors": []
  }
}

Updating a BXGY discount with invalid input returns an error

Description

This example shows the error response that's returned when you update a [BXGY discount](https://help.shopify.com/manual/discounts/discount-types/buy-x-get-y) with invalid input. In this case, the error occurs because the discount percentage is greater than 1.0 (100%).

Query

mutation discountAutomaticBxgyUpdate($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
  discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
    automaticDiscountNode {
      id
    }
    userErrors {
      field
      message
    }
  }
}

Variables

{
  "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
  "automaticBxgyDiscount": {
    "title": "Invalid discount percentage",
    "customerGets": {
      "value": {
        "discountOnQuantity": {
          "quantity": "1",
          "effect": {
            "percentage": 1.5
          }
        }
      }
    }
  }
}

cURL

curl -X POST \
https://your-development-store.myshopify.com/admin/api/2025-07/graphql.json \
-H 'Content-Type: application/json' \
-H 'X-Shopify-Access-Token: {access_token}' \
-d '{
"query": "mutation discountAutomaticBxgyUpdate($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) { discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) { automaticDiscountNode { id } userErrors { field message } } }",
 "variables": {
    "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
    "automaticBxgyDiscount": {
      "title": "Invalid discount percentage",
      "customerGets": {
        "value": {
          "discountOnQuantity": {
            "quantity": "1",
            "effect": {
              "percentage": 1.5
            }
          }
        }
      }
    }
  }
}'

React Router

import { authenticate } from "../shopify.server";

export const loader = async ({request}) => {
  const { admin } = await authenticate.admin(request);
  const response = await admin.graphql(
    `#graphql
  mutation discountAutomaticBxgyUpdate($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
    discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
      automaticDiscountNode {
        id
      }
      userErrors {
        field
        message
      }
    }
  }`,
  {
    variables: {
        "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
        "automaticBxgyDiscount": {
            "title": "Invalid discount percentage",
            "customerGets": {
                "value": {
                    "discountOnQuantity": {
                        "quantity": "1",
                        "effect": {
                            "percentage": 1.5
                        }
                    }
                }
            }
        }
    },
  },
  );
  const json = await response.json();
  return json.data;
}

Ruby

session = ShopifyAPI::Auth::Session.new(
  shop: "your-development-store.myshopify.com",
  access_token: access_token
)
client = ShopifyAPI::Clients::Graphql::Admin.new(
  session: session
)

query = <<~QUERY
  mutation discountAutomaticBxgyUpdate($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
    discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
      automaticDiscountNode {
        id
      }
      userErrors {
        field
        message
      }
    }
  }
QUERY

variables = {
  "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
  "automaticBxgyDiscount": {
    "title": "Invalid discount percentage",
    "customerGets": {
      "value": {
        "discountOnQuantity": {
          "quantity": "1",
          "effect": {
            "percentage": 1.5
          }
        }
      }
    }
  }
}

response = client.query(query: query, variables: variables)

Node.js

const client = new shopify.clients.Graphql({session});
const data = await client.query({
  data: {
    "query": `mutation discountAutomaticBxgyUpdate($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
      discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
        automaticDiscountNode {
          id
        }
        userErrors {
          field
          message
        }
      }
    }`,
    "variables": {
        "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
        "automaticBxgyDiscount": {
            "title": "Invalid discount percentage",
            "customerGets": {
                "value": {
                    "discountOnQuantity": {
                        "quantity": "1",
                        "effect": {
                            "percentage": 1.5
                        }
                    }
                }
            }
        }
    },
  },
});

Response

{
  "discountAutomaticBxgyUpdate": {
    "automaticDiscountNode": null,
    "userErrors": [
      {
        "field": [
          "automaticBxgyDiscount",
          "customerGets",
          "value",
          "discountOnQuantity",
          "effect",
          "percentage"
        ],
        "message": "Value must be between 0.0 and 1.0"
      }
    ]
  }
}

discountAutomaticBxgyUpdate reference

Examples

Open in GraphiQL

import { authenticate } from "../shopify.server";

export const loader = async ({request}) => {

const { admin } = await authenticate.admin(request);

const response = await admin.graphql(

`#graphql

mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {

discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {

automaticDiscountNode {

automaticDiscount {

... on DiscountAutomaticBxgy {

title

startsAt

endsAt

}

userErrors {

field

message

}

}`,

{

variables: {

"id": "gid://shopify/DiscountAutomaticBxgy/198286294",

"automaticBxgyDiscount": {

"title": "Buy first product, get second product free",

"startsAt": "2025-01-01T00:00:00Z",

"endsAt": "2025-12-31T23:59:59Z",

"customerBuys": {

"items": {

"products": {

"productsToAdd": [

"gid://shopify/Product/108828309"

]

}

"value": {

"quantity": "1"

}

"customerGets": {

"items": {

"products": {

"productsToAdd": [

"gid://shopify/Product/20995642"

]

}

"value": {

"discountOnQuantity": {

"quantity": "1",

"effect": {

"percentage": 1

}

"usesPerOrderLimit": "1"

}

);

const json = await response.json();

return json.data;

}

mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
  discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
    automaticDiscountNode {
      id
      automaticDiscount {
        ... on DiscountAutomaticBxgy {
          title
          startsAt
          endsAt
        }
      }
    }
    userErrors {
      field
      message
    }
  }
}

curl -X POST \
https://your-development-store.myshopify.com/admin/api/2025-07/graphql.json \
-H 'Content-Type: application/json' \
-H 'X-Shopify-Access-Token: {access_token}' \
-d '{
"query": "mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) { discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) { automaticDiscountNode { id automaticDiscount { ... on DiscountAutomaticBxgy { title startsAt endsAt } } } userErrors { field message } } }",
 "variables": {
    "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
    "automaticBxgyDiscount": {
      "title": "Buy first product, get second product free",
      "startsAt": "2025-01-01T00:00:00Z",
      "endsAt": "2025-12-31T23:59:59Z",
      "customerBuys": {
        "items": {
          "products": {
            "productsToAdd": [
              "gid://shopify/Product/108828309"
            ]
          }
        },
        "value": {
          "quantity": "1"
        }
      },
      "customerGets": {
        "items": {
          "products": {
            "productsToAdd": [
              "gid://shopify/Product/20995642"
            ]
          }
        },
        "value": {
          "discountOnQuantity": {
            "quantity": "1",
            "effect": {
              "percentage": 1
            }
          }
        }
      },
      "usesPerOrderLimit": "1"
    }
  }
}'

import { authenticate } from "../shopify.server";

export const loader = async ({request}) => {
  const { admin } = await authenticate.admin(request);
  const response = await admin.graphql(
    `#graphql
  mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
    discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
      automaticDiscountNode {
        id
        automaticDiscount {
          ... on DiscountAutomaticBxgy {
            title
            startsAt
            endsAt
          }
        }
      }
      userErrors {
        field
        message
      }
    }
  }`,
  {
    variables: {
        "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
        "automaticBxgyDiscount": {
            "title": "Buy first product, get second product free",
            "startsAt": "2025-01-01T00:00:00Z",
            "endsAt": "2025-12-31T23:59:59Z",
            "customerBuys": {
                "items": {
                    "products": {
                        "productsToAdd": [
                            "gid://shopify/Product/108828309"
                        ]
                    }
                },
                "value": {
                    "quantity": "1"
                }
            },
            "customerGets": {
                "items": {
                    "products": {
                        "productsToAdd": [
                            "gid://shopify/Product/20995642"
                        ]
                    }
                },
                "value": {
                    "discountOnQuantity": {
                        "quantity": "1",
                        "effect": {
                            "percentage": 1
                        }
                    }
                }
            },
            "usesPerOrderLimit": "1"
        }
    },
  },
  );
  const json = await response.json();
  return json.data;
}

const client = new shopify.clients.Graphql({session});
const data = await client.query({
  data: {
    "query": `mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
      discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
        automaticDiscountNode {
          id
          automaticDiscount {
            ... on DiscountAutomaticBxgy {
              title
              startsAt
              endsAt
            }
          }
        }
        userErrors {
          field
          message
        }
      }
    }`,
    "variables": {
        "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
        "automaticBxgyDiscount": {
            "title": "Buy first product, get second product free",
            "startsAt": "2025-01-01T00:00:00Z",
            "endsAt": "2025-12-31T23:59:59Z",
            "customerBuys": {
                "items": {
                    "products": {
                        "productsToAdd": [
                            "gid://shopify/Product/108828309"
                        ]
                    }
                },
                "value": {
                    "quantity": "1"
                }
            },
            "customerGets": {
                "items": {
                    "products": {
                        "productsToAdd": [
                            "gid://shopify/Product/20995642"
                        ]
                    }
                },
                "value": {
                    "discountOnQuantity": {
                        "quantity": "1",
                        "effect": {
                            "percentage": 1
                        }
                    }
                }
            },
            "usesPerOrderLimit": "1"
        }
    },
  },
});

session = ShopifyAPI::Auth::Session.new(
  shop: "your-development-store.myshopify.com",
  access_token: access_token
)
client = ShopifyAPI::Clients::Graphql::Admin.new(
  session: session
)

query = <<~QUERY
  mutation UpdateBxgyDiscount($id: ID!, $automaticBxgyDiscount: DiscountAutomaticBxgyInput!) {
    discountAutomaticBxgyUpdate(id: $id, automaticBxgyDiscount: $automaticBxgyDiscount) {
      automaticDiscountNode {
        id
        automaticDiscount {
          ... on DiscountAutomaticBxgy {
            title
            startsAt
            endsAt
          }
        }
      }
      userErrors {
        field
        message
      }
    }
  }
QUERY

variables = {
  "id": "gid://shopify/DiscountAutomaticBxgy/198286294",
  "automaticBxgyDiscount": {
    "title": "Buy first product, get second product free",
    "startsAt": "2025-01-01T00:00:00Z",
    "endsAt": "2025-12-31T23:59:59Z",
    "customerBuys": {
      "items": {
        "products": {
          "productsToAdd": [
            "gid://shopify/Product/108828309"
          ]
        }
      },
      "value": {
        "quantity": "1"
      }
    },
    "customerGets": {
      "items": {
        "products": {
          "productsToAdd": [
            "gid://shopify/Product/20995642"
          ]
        }
      },
      "value": {
        "discountOnQuantity": {
          "quantity": "1",
          "effect": {
            "percentage": 1
          }
        }
      }
    },
    "usesPerOrderLimit": "1"
  }
}

response = client.query(query: query, variables: variables)

Input variables

JSON

{

"id": "gid://shopify/DiscountAutomaticBxgy/198286294",

"automaticBxgyDiscount": {

"title": "Buy first product, get second product free",

"startsAt": "2025-01-01T00:00:00Z",

"endsAt": "2025-12-31T23:59:59Z",

"customerBuys": {

"items": {

"products": {

"productsToAdd": [

"gid://shopify/Product/108828309"

]

}

"value": {

"quantity": "1"

}

"customerGets": {

"items": {

"products": {

"productsToAdd": [

"gid://shopify/Product/20995642"

]

}

"value": {

"discountOnQuantity": {

"quantity": "1",

"effect": {

"percentage": 1

}

"usesPerOrderLimit": "1"

}

Response

JSON

{

"discountAutomaticBxgyUpdate": {

"automaticDiscountNode": {

"id": "gid://shopify/DiscountAutomaticNode/198286294",

"automaticDiscount": {

"title": "Buy first product, get second product free",

"startsAt": "2025-01-01T00:00:00Z",

"endsAt": "2025-12-31T23:59:59Z"

}

"userErrors": []

}