Disable product that relate to another product make graphql break when query.

[forfin]

Preconditions (*)

1. Magento Open Source 2.4-develop, 2.3.5-p1 fresh install

Steps to reproduce (*)

1. Create first product (name: test-01).
2. Create another product (name: test-02). + Add test-01 as related products
3. Disable product test-01
4. Send graphql request to get relate product

curl -X POST \
  http://magento-2-fresh/graphql \
  -H 'cache-control: no-cache' \
  -H 'content-type: application/json' \
  -d '{"query":"  query productDetail {\n    productDetail: products(pageSize: 10, currentPage: 1, search: \"\") {\n      items {\n        id\n        sku\n        name\n        related_products {\n          id\n          sku\n          url_key\n        }\n      }\n    }\n  }","operationName":"productDetail"}'

• Graphql format

query productDetail {
  productDetail: products(pageSize: 10, currentPage: 1, search: "") {
    items {
      id
      sku
      name
      related_products {
        id
        sku
        url_key
      }
    }
  }
}

Expected result (*)

1. json response with no error

{
    "data": {
        "productDetail": {
            "items": [
                {
                    "id": 2,
                    "sku": "Test-02",
                    "name": "Test-02",
                    "related_products": []
                }
            ]
        }
    }
}

Actual result (*)

{
    "errors": [
        {
            "debugMessage": "Notice: Undefined offset: 1 in /app/vendor/magento/module-related-product-graph-ql/Model/Resolver/Batch/AbstractLikedProducts.php on line 115",
            "message": "Internal server error",
            "extensions": {
                "category": "internal"
            },
            "locations": [
                {
                    "line": 7,
                    "column": 9
                }
            ],
            "path": [
                "productDetail",
                "items",
                0,
                "related_products"
            ]
        }
    ],
    "data": {
        "productDetail": {
            "items": [
                {
                    "id": 2,
                    "sku": "Test-02",
                    "name": "Test-02",
                    "related_products": null
                }
            ]
        }
    }
}

---

Please provide Severity assessment for the Issue as Reporter. This information will help during Confirmation and Issue triage processes.

• 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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[magento-engcom-team]

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