0

我正在练习在 Nodejs 中使用带有 Graphql 的指令。在 Playground 中我想使用 @include 指令时，Graphql 客户端告诉我：“未知指令包含”。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)"
            ]
          }
        }
      }
    ]
  }
}

我究竟做错了什么？

4

1 回答 1

2

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。我在这里发现版本 4 的指令存在问题，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指令和所有其他可用的指令。

于 2020-10-24T21:28:43.830 回答