Axios和Apollo服务器- TypeError [ERR_INVALID_ARG_TYPE]:

Question

我开始学习Graphql，我正在使用Axios编写服务器。当我访问阿波罗的沙盒时，当页面加载时，我得到以下错误。我不知道错误在哪里，发生了什么。

这是我的索引:

import { ApolloServer } from 'apollo-server'
import { resolvers, typeDefs } from './graphql/schema'
import 'dotenv/config'
import axios from "axios"

const server = new ApolloServer({
typeDefs: typeDefs,
resolvers: enter code hereresolvers,

context: () => {
return axios
}
})
server.listen(process.env.SERVER_PORT).then((url) => {
console.log(`Server listening on url ${url.url}`)
})

这是我的resolvers.ts

const user = async (_: any, {id}: any, {axios}: any, info: any) => {
const user = await axios.get("http://localhost:3000/user/1/")
return user.data
}
// 2ª variável: parâmetros da consulta
// 3ª variável: context
const users = async (_: any, __: any, {axios}: any, info: any) => {
const users = await axios.get("http://localhost:3000/users")
return users.data
}
export const userResolvers = {
Query: {
user,
users
}
}

这是我的typedefs.ts

import { gql } from "apollo-server";

export const UserTypeDefs = gql`
extend type Query {
user(id: ID!): User! # O símbolo '!' indica obrigatoriedade na consulta
users: [User!]!
}
type User {
id: ID!
username: String!
firstName: String!
lastName: String!
indexRef: Int!
createdAt: String!
#  Posts associados
# posts: [Posts!]!
}`

错误如下:

$ nodemon --exec ts-node ./src/index.ts
[nodemon] 2.0.15
[nodemon] to restart at any time, enter `rs`
[nodemon] watching path(s): *.*
[nodemon] watching extensions: ts,json
[nodemon] starting `ts-node ./src/index.ts`
Server listening on url http://localhost:4003/
TypeError [ERR_INVALID_ARG_TYPE]: The "url" argument must be of type string. Received undefined
at new NodeError (node:internal/errors:371:5)
at validateString (node:internal/validators:120:11)
at Url.parse (node:url:169:3)
at Object.urlParse [as parse] (node:url:156:13)
at dispatchHttpRequest (D:ClienteDiversosgraphqlnode_modulesaxioslibadaptershttp.js:133:22)
at new Promise (<anonymous>)
at httpAdapter (D:ClienteDiversosgraphqlnode_modulesaxioslibadaptershttp.js:49:10)
at dispatchRequest (D:ClienteDiversosgraphqlnode_modulesaxioslibcoredispatchRequest.js:58:10)
at Axios.request (D:ClienteDiversosgraphqlnode_modulesaxioslibcoreAxios.js:109:15)
at Object.wrap [as context] (D:ClienteDiversosgraphqlnode_modulesaxioslibhelpersbind.js:9:15) {
code: 'ERR_INVALID_ARG_TYPE'
}
[nodemon] app crashed - waiting for file changes before starting...

Answer 1

url需要解构;把索引的最后一部分改一下。ts:

server.listen(process.env.SERVER_PORT).then(({ url }) => {
console.log(`Server listening on url ${url}`)
})