子解析器中的 Graphql-Access 参数

问题描述

我正在使用 apollo-server 和 apollo-graphql-tools 并且我有以下架构

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Resolver函数是这样的

and Resolver functions are like this

{
  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，如何访问在任何子解析器的根解析器 (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 严格引用在该字段的查询中提供的参数.如果您希望子解析器可以使用值，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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