Apollo-server-express 返回 "cannot Get /" 而不是 Graphql 游乐场

Question

所以我的 server.js 和 schema.js 都有这段代码来自于 apollo doc 教程 https://www.apollographql.com/docs/tutorial/introduction/

server.js

import apollo from "apollo-server-express";
const { ApolloServer } = apollo;
import express from "express";
import typeDefs from "./schema.js";

const app = express();
const server = new ApolloServer({
  typeDefs,
  playground: true,
});

server.applyMiddleware({ app });

const PORT = process.env.PORT || 4000;
app.listen(PORT, () => {
  console.log(`operating on port ${PORT}`);
})

schema.js

import pkg from "apollo-server-express"
const { gql } = pkg

// defining schema
 const typeDefs = gql`
  type Launch {
    id: ID!
    site: String
    mission: Mission
    rocket: Rocket
    isBooked: Boolean!
  }
  type Rocket {
    id: ID!
    name: String
    type: String
  }

  type User {
    id: ID!
    email: String!
    trips: [Launch]!
  }

  type Mission {
    name: String
    missionPatch(size: PatchSize): String
  }

  enum PatchSize {
    SMALL
    LARGE
  }
  type Query {
    launches: [Launch]!
    launch(id: ID!): Launch
    me: User
  }
  type Mutation {
    bookTrips(launchIds: [ID]!): TripUpdateResponse!
    cancelTrip(launchId: ID!): TripUpdateResponse!
    login(email: String): String # login token
  }
  type TripUpdateResponse {
    success: Boolean!
    message: String
    launches: [Launch]
  }
`
export default typeDefs

我做的唯一调整是选择 import/exporting 模块的 ES 模块方法而不是文档中使用的 commonJS 方法，我认为这应该不是问题，它编译没有错误但不是让 graphql playground 查看我的模式，我得到一个 cannot Get /

我还没有完成解析器，但在这一点上，我相信我应该已经看到了运行中的操场。根据文档

Answer 1

使用applyMiddleware时，如果不明确指定路径，默认为/graphql。

这意味着您将在 localhost:${PORT}/graphql 而不是 localhost:${PORT} 访问您的端点和 GraphQL Playground 界面（这是您根据错误消息所做的）。

Apollo-server-express 返回 "cannot Get /" 而不是 Graphql 游乐场

Apollo-server-express returning "cannot Get /" instead of the Graphql playground

node.js

express

graphql

apollo-server