如何将嵌套变量传递给 Apollo 中的 GraphQL 查询？

Question

尝试将嵌套变量传递给 GraphQL 查询，但我的服务器只获取顶级变量 (shopId)，其他所有变量均为空。

我试过了：

#1

const CALCULATE_PACKAGE_PRICE = gql`
  query CalculatePackagePrice(
    $shopId: String!
    $address1: String
    $zip: String
    $city: String
    $countryCode: String
    ) {
    calculatePackagePrice(
      where: {
        shopId: $shopId
        destination: {
          address1: $address1
          zip: $zip
          city: $city
          countryCode: $countryCode
        }
      }
    ) {
      name
      price
      userErrors {
        field
        message
      }
    }
  }
`

const [calculatePackagePrice, { loading, data }] = useLazyQuery(
  CALCULATE_PACKAGE_PRICE,
  {
    variables: {
      shopId: shopId,
      destination: {
        address1: "Example 123",
        zip: "123",
        city: "Test",
        countryCode: "US",
      },
    },
  }
)

还有#2：

export function CALCULATE_PACKAGE_PRICE({ shopId, destination }) {
  return gql`
    query CalculatePackagePrice {
        calculatePackagePrice(
          where: {
            shopId: "${shopId}"
            destination: {
              address1: "${destination.address1}"
              zip: "${destination.zip}
              city: "${destination.city}"
              countryCode: "${destination.countryCode}"
            }
          }
        ) {
          name
          price
          userErrors {
            field
            message
          }
        }
      }
  `
}


const [calculatePackagePrice, { loading, data }] = useLazyQuery(
  CALCULATE_PACKAGE_PRICE({
    shopId: shopId,
    destination: {
      address1: "Example 123",
      zip: "123",
      city: "Test",
      countryCode: "US",
    },
  })
)

当我将变量内容硬编码到查询中时，它工作得很好。我做错了什么？

Answer 1

这是来自 graphql 文档的一个有用的 sn-p，

所有声明的变量必须是标量、枚举或输入对象类型。所以如果你想将一个复杂的对象传递给一个字段，你需要知道服务器上匹配的输入类型。

您正确地将变量作为字符串传递，但随后尝试（也许成功，但我以前从未见过语法）在 gql 模板字符串中创建对象。相反，为目的地和地点创建一个输入类型。

input WhereInput {
  shopId: String!
  destination: DestinationInput!
}

input DestinationInput {
  address1: String!
  zip: String!
  city: String!
  countryCode: String!
}

然后在客户端更改查询（并更新服务器定义），

const CALCULATE_PACKAGE_PRICE = gql`
  query CalculatePackagePrice($where: WhereInput!) {
    calculatePackagePrice(where: $where) {
      name
      price
      userErrors {
        field
        message
      }
    }
  }
`

然后传递变量，如，

const [calculatePackagePrice, { loading, data }] = useLazyQuery(
  CALCULATE_PACKAGE_PRICE,
  {
    variables: {
      where: {
        shopId,
        destination: {
          address1: "Example 123",
          zip: "123",
          city: "Test",
          countryCode: "US",
        },
      },
    }
  }
)