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types - GraphQL 类型的突变变量以某种方式永远不会改变

问题描述

这种行为对我来说不再有意义。

我的突变：

export const DEVICE_CREATE_INPUT = gql`
    mutation CreateDevice(
        $attributeList: String
      ) {
        createDevice(
          input: {
            attributeList: $attributeList
          }
        ) {
          device {
            id
            _id
          }
        }
      }
`;

我的打字稿代码：

private createDeviceRequest(
    attributeList: string,
  ) {
    return this.apollo.mutate({
      mutation: DEVICE_CREATE_INPUT,
      variables: {
        attributeList
      }
    });
  }

当我尝试发送突变（attributeList =“”）时，它给了我以下错误消息：

zone-evergreen.js:659 Unhandled Promise rejection: Variable "$attributeList" of type "String" used in position expecting type "Iterable!". ; Zone: <root> ; Task: Promise.then ; Value: Error: Variable "$attributeList" of type "String" used in position expecting type "Iterable!".
    at new ApolloError (index.js:26)
    at Object.next (QueryManager.js:88)
    at notifySubscription (Observable.js:135)
    at onNotify (Observable.js:179)
    at SubscriptionObserver.next (Observable.js:235)
    at iteration.js:4
    at Array.forEach (<anonymous>)
    at iterateObserversSafely (iteration.js:4)
    at Object.next (Concast.js:25)
    at notifySubscription (Observable.js:135) Error: Variable "$attributeList" of type "String" used in position expecting type "Iterable!".
    at new ApolloError (http://localhost:8100/vendor.js:62615:28)
    at Object.next (http://localhost:8100/vendor.js:152614:53)
    at notifySubscription (http://localhost:8100/vendor.js:136374:18)
    at onNotify (http://localhost:8100/vendor.js:136418:3)
    at SubscriptionObserver.next (http://localhost:8100/vendor.js:136474:7)
    at http://localhost:8100/vendor.js:1059:68
    at Array.forEach (<anonymous>)
    at iterateObserversSafely (http://localhost:8100/vendor.js:1059:25)
    at Object.next (http://localhost:8100/vendor.js:70868:97)
    at notifySubscription (http://localhost:8100/vendor.js:136374:18)

我确实使用了“Iterable”类型！在某些时候，但我想切换到字符串并在前端的任何地方都可以找到它。如果我现在在我的前端代码中对“Iterable”进行全面搜索，我将一无所获。这是缓存问题吗？

标签： typesgraphqlapolloscalar

解决方案

发生此错误是因为 createDevice 突变的预期输入类型与提供的类型不匹配。如果要使用 String 而不是 Iterable，则应将后端的 attributeList 的 typedef 从 Iterable 更改为 String。

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