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reactjs - GraphQL 类型在由 Relay 编译时在 Typescript 中被定义为未知

问题描述

我是使用 Typescript 的新手，发现从 GraphQL 模式和通过 Relay 生成的类型处理类型的方式不匹配。

这是一个例子：

# in schema.graphql
"""
columns and relationships of "businesses"
"""
type businesses implements Node {
  businessId: bigint!
  name: String!
}

// in __generated__/Business_business.graphql
export type Business_business = {
    readonly name: string;
    readonly businessId: unknown;
    readonly " $refType": "Business_business";
};
export type Business_business$data = Business_business;
export type Business_business$key = {
    readonly " $data"?: Business_business$data;
    readonly " $fragmentRefs": FragmentRefs<"Business_business">;
};

const BusinessFragment = graphql`
  fragment Business_business on businesses {
    name
    businessId
  }
`

type Props = {
  fragmentRef: Business_business$key
}

const Business = ({ fragmentRef }: Props) => {
  const business = useFragment(BusinessFragment, fragmentRef)
  return (
    <div>
      <p>my html!</>
      {/* I get the error: Type 'unknown' is not assignable to type 'number' for businessId */}
      <ChildComponent businessId={business.businessId} />
    </div>
  )
}


interface Props {
  businessId: number
}

const ChildComponent = ({ businessId }: Props) => {

  return (
    <p>my business id: {businessId}</p>
  )
}

我需要做其他配置才能让 Relay 了解 Hasura 类型吗？我通过中继文档遵循了这个例子。

我假设 Relay 没有编译bigint为number.

更新

我已将 Hasura 中的列类型从bigintto更改为Int，这解决了问题。有没有办法告诉 Relay 如何匹配它不熟悉的类型？bigint在这种情况下，投到number完全没问题。

标签： reactjstypescriptgraphqlrelayjshasura

解决方案

回答您的更新：您可以customScalars在relay.config.js. 我也在使用 Hasura，这就是我设置的：

module.exports = {
  // ... your other configs
  customScalars: {
    uuid: 'string',
    int8: 'string',
    bigint: 'string',
    numeric: 'number',
    varbit: 'string',
    bit: 'string',
    char: 'string',
    varchar: 'string',
    bool: 'boolean',
    int: 'number',
    int4: 'number',
    float8: 'number',
    timestamptz: 'string',
    timetz: 'string',
    jsonb: 'Record<string, unknown>',
    _text: 'string',
    date: 'string',
  }
};

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