Magento 2.3.4 graphql Notice: Undefined index: option_value in /var/www/html/mg234/vendor/magento/module-configurable-product-graph-ql/Model/Resolver/ConfigurableCartItemOptions.php on line 62

[prabhakaran777]

Preconditions (*)

1. Magento 2.3.4
2. Config product with custom options

Steps to reproduce (*)

1. Create config product with custom options
2. Add product to cart (addConfigurableProductsToCart) using this mutation

mutation {
  addConfigurableProductsToCart(
    input: {
      cart_id: "IkzvsoUeXwvb6g2jrdqVNmuXPqmznAqI"
      cart_items: [
        {
          parent_sku: "config-sku"
          data: {
            quantity: 1
            sku: "config-sku-White"
          }
        customizable_options:[	
          {
            id:2
            value_string:"4"
          }
        ]        }      ]
    }
  ) {
    cart {
      items {
        id
        quantity
        product {
          name
          sku
        }
        ... on ConfigurableCartItem {
          configurable_options {
            option_label
            value_label
            value_id
          }
         customizable_options {
            label
            values {
              value
            }
          }        }      }
    }
  }
}

Expected result (*)

1. Configurable product will add to cart

Actual result (*)

{
  "errors": [
    {
      "debugMessage": "Notice: Undefined index: option_value in /var/www/html/oxygen/vendor/magento/module-configurable-product-graph-ql/Model/Resolver/ConfigurableCartItemOptions.php on line 62",
      "message": "Internal server error",
      "extensions": {
        "category": "internal"
      },
      "locations": [
        {
          "line": 36,
          "column": 11
        }
      ],
      "path": [
        "addConfigurableProductsToCart",
        "cart",
        "items",
        0,
        "configurable_options"
      ]
    }
  ],
  "data": {
    "addConfigurableProductsToCart": {
      "cart": {
        "items": [
          null
        ]
      }
    }
  }
}

[m2-assistant]

Hi @prabhakaran777. Thank you for your report.
To help us process this issue please make sure that you provided the following information:

• Summary of the issue
• Information on your environment
• Steps to reproduce
• Expected and actual results

Please make sure that the issue is reproducible on the vanilla Magento instance following Steps to reproduce. To deploy vanilla Magento instance on our environment, please, add a comment to the issue:

@magento give me 2.4-develop instance - upcoming 2.4.x release

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Please, add a comment to assign the issue: @magento I am working on this

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[Serializator]

@magento give me 2.4-develop instance

[magento-engcom-team]

Hi @Serializator. Thank you for your request. I'm working on Magento 2.4-develop instance for you

[magento-engcom-team]

Hi @Serializator, here is your Magento instance.
Admin access: https://i-28860-2-4-develop.instances.magento-community.engineering/admin_766c
Login: e3f87154 Password: 55ea7d3052fb
Instance will be terminated in up to 3 hours.

[Serializator]

I was able to successfully reproduce this in the 2.4-develop branch.

@magento I am working on this

[rhoerr]

I investigated this error for a customer.

Debugging, ​the problem is vendor/magento/module-configurable-product-graph-ql/Model/Resolver/ConfigurableCartItemOptions.php:61 expects an $option['option_value'] to ​contain the custom option value ID, but no such value exists. $option is generated at vendor/magento/module-catalog/Helper/Product/Configuration.php:113, but $itemOption->getValue() is never added to the result array.
​
I believe the best fix would be adding the ID to the array in getCustomOptions:

                $options[] = [
                    'label' => $option->getTitle(),
                    'value' => $group->getFormattedOptionValue($itemOption->getValue()),
                    'print_value' => $group->getPrintableOptionValue($itemOption->getValue()),
                    'option_id' => $option->getId(),
                    'option_type' => $option->getType(),
+                   'option_value' => $itemOption->getValue(),
                    'custom_view' => $group->isCustomizedView(),
                ];

​
I can't speak to what further ramifications that might have.

Still unresolved as of 2.3.5-p2 and 2.4.0.