Apollo GraphQL 解析器类型签名中的信息参数为空

Question

我正在开发这个名为 Wertik JS 的库 https://github.com/ilyaskarim/wertik-js 以使 GraphQL + Rest API 更容易，在解析器中，当我控制台日志 info 时，它显示未定义。对于每个模块，我都创建了动态解析器，以使使用该库的开发人员更容易使用。

let object = {
    create: async (_:any, args:any, context:any,info: any) => {
      console.log(info); // This will be undefined
      let v = await validate(validations.create,args.input);
      let {success} = v;
      if (!success) {
        throw new ApolloError("Validation error",statusCodes.BAD_REQUEST.number,{list: v.errors})
      }
      try {
        let createModel = await model.create(args.input);
        pubsub.publish(`${camelCase(moduleName)}Created`, { [`${camelCase(moduleName)}Created`]: createModel });
        return createModel;
      } catch (e) {
        return internalServerError(e);
      }
    },
}

行：https://github.com/ilyaskarim/wertik-js/blob/ec813f49a14ddd6a04680b261ae4ef2aadc2b1a5/src/framework/dynamic/resolvers.ts#L102

该信息在 Apollo Server 文档 https://www.apollographql.com/docs/apollo-server/essentials/data/#resolver-type-signature 中有描述，它说：此参数包含有关查询执行状态的信息，包括字段名称、从根到字段的路径等.不幸的是，对我来说，它变得不确定。

要重现问题：

下载https://github.com/ilyaskarim/wertik-js/tree/development
纱线安装
转到examples/demo
运行 node index.js
现在去http://localhost:1209/
例如输入这个突变：

变异{ createRole（输入：{名称："Asd"}）{ 姓名 } }
这一行在这个突变上执行 https://github.com/ilyaskarim/wertik-js/blob/ec813f49a14ddd6a04680b261ae4ef2aadc2b1a5/src/framework/dynamic/resolvers.ts#L102
并且 returns 在控制台上未定义。

这是我设置应用程序的方式：

const { ApolloServer } = require('apollo-server');

import mutations from "./loadAllMutations";
import queries from "./loadAllQueries";
import resolvers from "./loadAllResolvers";
import subscriptions from "./loadAllSubscriptions";
import schemas from "./loadAllSchemas";
import generalSchema from "./../helpers/generalSchema";

export default function (rootDirectory: string,app: any,configuration: object) {
  let allMutations = mutations(rootDirectory);
  let allQueries=  queries(rootDirectory);
  let allSchemas = schemas(rootDirectory);
  let allResolvers = resolvers(rootDirectory);
  let allSubscriptions = subscriptions(rootDirectory);
  let {validateAccessToken} = require(`${rootDirectory}/framework/predefinedModules/user/auth`).default;
  let mainSchema  = `
    ${generalSchema}
    ${allSchemas}
    type Subscription {
      ${allSubscriptions}
    }
    type Mutation {
      ${allMutations}
    }
    type Query {
      ${allQueries}
    }
    schema {
      query: Query
      mutation: Mutation
      subscription: Subscription
    }
  `;
  const server = new ApolloServer({ 
    typeDefs: mainSchema, 
    resolvers: allResolvers,
    context: async (a: any) => {
      await validateAccessToken(a.req);
    }
  });
  server.listen(1209).then(({ url, subscriptionsUrl }) => {
    console.log(`Server ready at ${url}`);
    console.log(`Subscriptions ready at ${subscriptionsUrl}`);
  });
}

可能的原因是什么？

Answer 1

您正在截断解析器在 this module 中接收到的参数。如果您需要为某个对象分配一个函数属性，最好直接这样做：

mutations: {
  [`create${moduleName}`]: mutations[`create${moduleName}`],
},

这不仅更简洁，而且还意味着您不会冒意外遗漏参数的风险，这就是此处发生的情况。

Apollo GraphQL 解析器类型签名中的信息参数为空

info argument is empty in Apollo GraphQL resolver type signature

javascript

graphql

apollo

graphql-js

apollo-server