ApolloGraphQL——ReadQuery `Field Not Found` 错误？

Question

我的 readQuery 返回一个 field not found 错误，即使该字段似乎存在于缓存中。

查询

const GETIMSFROMCACHE_QUERY = gql`
query getIMsFromCache($fromID: String!){
  instant_message(fromID:$fromID){
    id,
    fromID,
    toID,
    msgText
  }
}  `;

缓存解析器

client.cache.cacheResolvers = {
    Query: {
        instant_message: (_, args) => toIdValue(client.dataIdFromObject({
            __typename: 'instant_message',
            id: args.id
        })),
    },
};

READQUERY 调用，更新中

let instant_message = cache.readQuery({ query: GETIMSFROMCACHE_QUERY, variables: {"fromID": fromID} });

错误

Error: Can't find field instant_message({"fromID":"ayqNLcA7c6r8vip3i"}) on object (ROOT_QUERY) {
  "getMyUserData({\"id\":\"ayqNLcA7c6r8vip3i\"})": [
    {
      "type": "id",
      "generated": false,
      "id": "MyUserData:ayqNLcA7c6r8vip3i",
      "typename": "MyUserData"
    }
  ],
  "getMyUserData({\"id\":\"9W95z8A7Y6i34buk7\"})": [
    {
      "type": "id",
      "generated": false,
      "id": "MyUserData:9W95z8A7Y6i34buk7",
      "typename": "MyUserData"
    }
  ],
  "Appts({\"originatingUserID\":\"ayqNLcA7c6r8vip3i\"})": [],
  "instant_message({\"fromID\":\"ayqNLcA7c6r8vip3i\",\"toID\":\"9W95z8A7Y6i34buk7\"})": [
    {
      "type": "id",
      "generated": false,
      "id": "instant_message:126",
      "typename": "instant_message"
    },
    {
      "type": "id",
      "generated": false,
      "id": "instant_message:127",
      "typename": "instant_message"
    },
    {
      "type": "id",
      "generated": false,
      "id": "instant_message:128",
      "typename": "instant_message"
    }
  ]
}.

查看错误消息，ROOT_QUERY 对象上似乎存在一个具有目标用户 ID 的 instant_message 对象，但我收到此错误。

我该如何纠正？

提前感谢大家提供的任何信息。

Answer 1

已解决！这很棘手，因为原始查询的常规解析器会从两个用户中的任何一个返回或的任何 IM。解析器 returns 来自 fromID 和 toID、 的任何 instant_messages，反之亦然 。

所以我想我需要某种缓存解析器来在查询缓存时重复此操作。

最终我意识到缓存并不关心解析器中发生了什么 -- 它会将 instant_message 对象存储为从 fromID 到 toID，无论解析器中发生的事情。

一旦意识到这一点，我就放弃了特殊的缓存解析器查询，只使用首先检索 instant_messages 的原始查询，并首先使用与它一起使用的相同查询变量，它奏效了。 :)

ApolloGraphQL——ReadQuery `Field Not Found` 错误？

ApolloGraphQL -- ReadQuery `Field Not Found` Error?

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