Adding multiple products to cart with custom options GraphQL fails to compare custom options properly

[dan-edan]

Preconditions and environment

Magento version 2.4.7-p2
PHP 8.3
Sample data installed via CLI
Add text field custom option to a product (I used SKU: 24-MB01)

Steps to reproduce

1. Send graphQL to init cart

mutation initCart {
  createGuestCart {
    cart {
      id
    }
  }
}

2. Get the custom option UID from the product query

query ProductByUrl($url: String!) {
  products(filter: { url_key: { eq: $url } }, pageSize: 1) {
    items {
      uid
      name
      sku
      ... on CustomizableProductInterface {
        options {
          title
          uid
        }
      }
    }
  }
}

Using these variables

{
  "url": "joust-duffle-bag"
}

3. With the cart ID from the previous command, send the graphQL to add products. This will be the same product but with different custom options.

mutation AddProductsToCart($cartId: String!, $cartItems: [CartItemInput!]!) {
  addProductsToCart(cartId: $cartId, cartItems: $cartItems) {
    cart {
      items {
        product {
          name
          sku
        }
        ... on SimpleCartItem {
          customizable_options {
            customizable_option_uid
            label
            values {
              customizable_option_value_uid
              value
            }
          }
        }
        quantity
      }
    }
    user_errors {
      code
      message
    }
  }
}

Using these variables

{
  "cartId": "<CART-ID>",
  "cartItems": [
    {
      "sku": "24-MB01",
      "quantity": 1,
      "entered_options": [
        {
          "uid": "<CUSTOM-OPTION-ID>",
          "value": "This is a test 1"
        }
      ]
    },
    {
      "sku": "24-MB01",
      "quantity": 1,
      "entered_options": [
        {
          "uid": "<CUSTOM-OPTION-ID>",
          "value": "This is a test 2"
        }
      ]
    }
  ]
}

Expected result

The cart should contain two products, each with a qty of 1, and both should have the respective custom option value.

Actual result

The cart contains just one item with a qty of 2, and the custom option value is just that of the first item sent in the variables.

Additional information

Adding products one at a time works as expected. However, performance suffers greatly.

Release note

No response

Triage and priority

• Severity: S0 - Affects critical data or functionality and leaves users without workaround.
• Severity: S1 - Affects critical data or functionality and forces users to employ a workaround.
• Severity: S2 - Affects non-critical data or functionality and forces users to employ a workaround.
• Severity: S3 - Affects non-critical data or functionality and does not force users to employ a workaround.
• Severity: S4 - Affects aesthetics, professional look and feel, “quality” or “usability”.

[m2-assistant]

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[m2-assistant]

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