When invoking the productSet API, the product returned by the API is null

[lww]

When using ProductSet GraphiQL to create a product, the product data returned  is null. Could you please help troubleshoot the issue?

GraphiQL is

mutation setProductSync($input: ProductSetInput!) {
    productSet(synchronous: true, input: $input) {
        product {
            id
            title
            productType
            status
            handle
            vendor
            descriptionHtml
            tags
            createdAt
            updatedAt
            publishedAt
            templateSuffix
            onlineStoreUrl
            media(first: 250, query: "media_type:IMAGE") {
                nodes {
                    ... on MediaImage {
                        createdAt
                        updatedAt
                        fileStatus
                        id
                        mediaContentType
                        image {
                            height
                            width
                            id
                            url
                        }
                    }
                }
            }
            variants(first: 250) {
                nodes {
                    availableForSale
                    barcode
                    compareAtPrice
                    createdAt
                    defaultCursor
                    displayName
                    sku
                    id
                    title
                    price
                    image {
                        id
                        url
                        height
                        width
                    }
                    inventoryPolicy
                    inventoryQuantity
                    inventoryItem {
                        id
                        sku
                        measurement {
                            weight {
                                unit
                                value
                            }
                        }
                    }
                }
            }
            options {
                id
                name
                values
                position
            }
        }
    }
}

variables is

{
  "input": {
    "descriptionHtml": "<p>Brand: Rongchang Item No.: 002 Specifications: Adult Glasses structure: Framework Whether polarized: No Lens material: PC Style: Retro Frame material: Plastic resistanceUVGrade: UV400 Style: General Visible light penetration rate: 80(%) OEM: Yes Model: 002 Strength: Strong additional printinglogo: Yes Whether to import: No Lens color: black frame ink lens,black frame suit Whether the source of cross-border export is exclusive: No Processing customization: Yes Lens material: PC suitable for face shape: small face Whether near vision is supported: No : :6</p>\n",
    "files": [
      {
        "contentType": "IMAGE",
        "originalSource": "https://s-cf-my.shopeesz.com/file/b975d25c88ca345b7e0b199d31f4d014"
      }
    ],
    "handle": "Sunglasses-Korean-Style-Internet-Popular-Sunglasses-Unisex-Sunglasses-V-Brand-Sunglasses-ing2361",
    "seo": {
      "description": "Brand: Rongchang\nItem No.: 002\nSpecifications: Adult\nGlasses structure: Framework\nWhether polarized: No\nLens material: PC\nStyle: Retro\nFrame material: Plastic\nresistanceUVGrade: UV400\nStyle: General\nVisible light penetration rate: 80(%)\nOEM: Yes\nModel: 002\nStrength: Strong\nadditional printinglo61",
      "title": "Sunglasses Korean Style Internet Popular Sunglasses Unisex Sunglasses6"
    },
    "tags": [
      "Sunglasses",
      "Korean-style",
      "net red",
      "Sunglasses",
      "Men and women",
      "Same paragraph",
      "Sunglasses"
    ],
    "title": "Sunglasses Korean Style Internet Popular Sunglasses Unisex Sunglasses V Brand Sunglasses ing61",
    "variants": [
      {
        "inventoryItem": {
          "requiresShipping": true,
          "tracked": false
        },
        "inventoryPolicy": "CONTINUE",
        "optionValues": [
          {
            "name": "Default Title",
            "optionName": "Title"
          }
        ],
        "price": 1998,
        "sku": "",
        "taxable": true
      }
    ]
  }
}

response is 

{
  "data": {
    "productSet": {
      "product": null
    }
  },
  "extensions": {
    "cost": {
      "requestedQueryCost": 110,
      "actualQueryCost": 50,
      "throttleStatus": {
        "maximumAvailable": 2000,
        "currentlyAvailable": 1950,
        "restoreRate": 100
      }
    }
  }
}

[Joslu]

You need to request in your mutation the userErrors to see what errors occurs on your request to GraphQL API, you could do something like these:

 mutation createProductWithVariants($productSet: ProductSetInput!, $synchronous: Boolean!) {
        productSet(synchronous: $synchronous, input: $productSet) {
            product {
              id
              variants(first: 20) {
                  nodes {
                    id
                    inventoryItem {
                      id
                    }
                  }
              }
            }
            userErrors {
              field
              message
            }
      }
    }

Also, I guess that your problem is that you are requesting two connections in the same mutation (a connection is when you request nodes in a field). Depending on what you want the GraphQL API to return from the mutation, normally you only need the id of the product and maybe the ids from variants. That payload determines the format of the response from the GraphQL API.