Node.js GraphQL Query.resolve必须是对象

我是GraphQL新手，尝试针对模拟数据源建立一个基本查询设置，该模拟数据源仅通过

过滤器

解析通过id提取记录的承诺。我有以下几点：

const {
  GraphQLSchema,
  GraphQLObjectType,
  GraphQLString,
  GraphQLList
} = require('graphql')

const db = require('../db')

const getUserById = (id) => db.read(id)

const UserType = new GraphQLObjectType({
  name: 'User',
  description: 'User Type',
  fields: () => ({
    first_name: {
      type: GraphQLString
    },
    last_name: {
      type: GraphQLString
    },
    email: {
      type: GraphQLString
    },
    friends: {
      type: new GraphQLList(UserType),
      resolve: (user) => user.friends.map(getUserById)
    }
  })
})

const QueryType = new GraphQLObjectType({
  name: 'Query',
  description: 'User Query',
  fields: () => ({
    user: {
      type: UserType,
      args: {
        id: { type: GraphQLString }
      }
    },
    resolve: (root, args) => getUserById(args.id)
  })
})

const schema = new GraphQLSchema({
  query: QueryType
})


module.exports = schema

Error: Query.resolve field config must be an object

当我尝试使用

graphQLHTTP

运行此程序时，我得到以下结果：

const {
  GraphQLSchema,
  GraphQLObjectType,
  GraphQLString,
  GraphQLList
} = require('graphql')

const db = require('../db')

const getUserById = (id) => db.read(id)

const UserType = new GraphQLObjectType({
  name: 'User',
  description: 'User Type',
  fields: () => ({
    first_name: {
      type: GraphQLString
    },
    last_name: {
      type: GraphQLString
    },
    email: {
      type: GraphQLString
    },
    friends: {
      type: new GraphQLList(UserType),
      resolve: (user) => user.friends.map(getUserById)
    }
  })
})

const QueryType = new GraphQLObjectType({
  name: 'Query',
  description: 'User Query',
  fields: () => ({
    user: {
      type: UserType,
      args: {
        id: { type: GraphQLString }
      }
    },
    resolve: (root, args) => getUserById(args.id)
  })
})

const schema = new GraphQLSchema({
  query: QueryType
})


module.exports = schema

Error: Query.resolve field config must be an object

---

我一直在跟踪，无法找出我做错了什么。

您意外地将

用户的解析器设置为查询类型中的一个字段。将其移动到
user
字段中，您应该会表现良好。
完美！谢谢您！