GraphQL：未知指令包括

Question

我正在练习在 Nodejs 中使用 Graphql 指令。在 Playground 中，当我想使用 @include 指令时，Graphql 客户端告诉我：“Unknow directive include”。这是我的代码：

query getChar($id: ID!, $withGames: Boolean!) {
  getCharacter(_id: $id) {
    _id
    name
    race
    games @include(if: $withGames) {
      _id
      title
    }
    image
  }
}

在我的查询变量中我有：

{
  "id": "5f945a7b24c84f35ecfae633",
  "withGames": false
}

但我收到以下错误：

{
  "error": {
    "errors": [
      {
        "message": "Unknown directive \"@include\".",
        "locations": [
          {
            "line": 6,
            "column": 11
          }
        ],
        "extensions": {
          "code": "GRAPHQL_VALIDATION_FAILED",
          "exception": {
            "stacktrace": [
              "GraphQLError: Unknown directive \"@include\".",
              "    at Object.Directive (C:\Users\MSI\projects\Graphql\cursobasico\node_modules\graphql\validation\rules\KnownDirectivesRule.js:56:29)",
              "    at Object.enter (C:\Users\MSI\projects\Graphql\cursobasico\node_modules\graphql\language\visitor.js:323:29)",
              "    at Object.enter (C:\Users\MSI\projects\Graphql\cursobasico\node_modules\graphql\utilities\TypeInfo.js:370:25)",
              "    at visit (C:\Users\MSI\projects\Graphql\cursobasico\node_modules\graphql\language\visitor.js:243:26)",
              "    at Object.validate (C:\Users\MSI\projects\Graphql\cursobasico\node_modules\graphql\validation\validate.js:69:24)",
              "    at validate (C:\Users\MSI\projects\Graphql\cursobasico\node_modules\apollo-server-core\src\requestPipeline.ts:510:14)",
              "    at Object.<anonymous> (C:\Users\MSI\projects\Graphql\cursobasico\node_modules\apollo-server-core\src\requestPipeline.ts:296:32)",
              "    at Generator.next (<anonymous>)",
              "    at fulfilled (C:\Users\MSI\projects\Graphql\cursobasico\node_modules\apollo-server-core\dist\requestPipeline.js:5:58)",
              "    at processTicksAndRejections (internal/process/task_queues.js:97:5)"
            ]
          }
        }
      }
    ]
  }
}

我做错了什么？

Answer 1

It was a version problem of the graphql-tools。检查 node_modules/graphql-tools/package.json 文件，我发现我使用的是版本 4。我发现 here 版本 4 的指令有问题，建议使用版本 5。这就是我所做的：

npm i graphql-tools@5.0.0

我重新启动了服务器并刷新了 Playground page 瞧，我已经有了 @include 指令和所有其他指令。

GraphQL：未知指令包括

GraphQL: Unknow directive include

graphql

graphql-js

graphql-tools