nestjs - 为什么 NestJS GraphQL 验证错误没有放置在错误消息字段中？

Question

我在意外的位置看到了一些类验证器错误。我希望有一种更方便的格式来处理错误，但也许我不知道一些用于处理扩展字段中对象的 graphQL 技巧......

在运行 NestJS sample/23-graphql-code-first 时，我在 GraphQL 操场中看到以下内容:

有输入:

  addRecipe(newRecipeData: {
    description: "too short"
    title: "this field should fail for being too long"
    ingredients: ["normal"]

  }) {
    title
  }
}

我回来了:

  "errors": [
    {
      "message": "Bad Request Exception",
      "locations": [
        {
          "line": 2,
          "column": 3
        }
      ],
      "path": [
        "addRecipe"
      ],
      "extensions": {
        "code": "INTERNAL_SERVER_ERROR",
        "exception": {
          "response": {
            "statusCode": 400,
            "message": [
              "title must be shorter than or equal to 30 characters",
              "description must be longer than or equal to 30 characters"
            ],
            "error": "Bad Request"
          },
          "status": 400,
          "message": "Bad Request Exception",
          "stacktrace": [
            "Error: Bad Request Exception",
            "    at ValidationPipe.exceptionFactory nest/sample/23-graphql-code-first/node_modules/@nestjs/common/pipes/validation.pipe.js:78:20)",
          ...
          ]
        }
      }
    }
  ],
  "data": null
}

这些错误是深层嵌套的，“错误请求异常”没有那么有用。这是否按预期工作？

Answer 1

最佳解决方案基于 this official comment : 创建您自己的 formatError 或 formatResponse 函数。
我刚用过 in this project on GitHub它工作正常!
我的 sample :

    import { GraphQLError, GraphQLFormattedError } from 'graphql';
    
    GraphQLModule.forRoot({
      autoSchemaFile: true,
      debug: false,
      formatError: (error: GraphQLError) => {
        const graphQLFormattedError: GraphQLFormattedError = {
          message: error.extensions.exception.response.message || error.message,
        };
        return graphQLFormattedError;
      },
    }),

现在，我收到来自 GraphQL 的格式化错误响应:

{
  "errors": [
    {
      "message": [
        "firstName must be longer than or equal to 1 characters",
        "lastName must be longer than or equal to 1 characters"
      ]
    }
  ],
  "data": null
}