子解析器中的Graphql-Access参数 [英] Graphql-Access arguments in child resolvers

问题描述

我正在使用apollo-server和apollo-graphql-tools，并且具有以下架构

I am using apollo-server and apollo-graphql-tools and I have following schema

type TotalVehicleResponse {
  totalCars: Int
  totalTrucks: Int
}

type RootQuery {
  getTotalVehicals(color: String): TotalVehicleResponse
}

schema {
  query: RootQuery
}

和解析器功能是这样的

{
  RootQuery: {
    getTotalVehicals: async (root, args, context) => {
      // args = {color: 'something'}
      return {};
    },
    TotalVehicleResponse: {
      totalCars: async (root, args, conext) => {
        // args is empty({}) here
        .........
        .........
      },
      totalTrucks: async (root, args, conext) => {
        // args is empty({}) here
        .........
        .........
      }
    }
  }
}

我的问题是，如何访问任何子解析器中的根解析器(getTotalVehicals)中可用的args?

My question is that how can I access args which is available in root resolver(getTotalVehicals) in any of the child resolvers?

推荐答案

args严格引用查询中提供给该字段的参数.如果希望将值提供给子解析器，则只需从父解析器返回它们即可.

args refer strictly to the arguments provided in the query to that field. If you want values to be made available to child resolvers, you can simply return them from the parent resolver.

{
  RootQuery: {
    getTotalVehicles: async (root, args, context) => {
      return { color: args.color };
    },
    TotalVehicleResponse: {
      totalCars: async (root, args, context) => {
        // root contains color here
      },
      totalTrucks: async (root, args, context) => {
        // root contains color here
      }
    }
  }
}

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