无法获取 graphql 服务器

Question

你好，我遵循了 GraphQL 的教程，这是我到目前为止编写的代码：

    const express = require('express');
const {graphqlHTTP} = require('express-graphql');
const graphql = require('graphql')
const {
    GraphQLSchema,
    GraphQLObjectType,
    GraphQLString,
    GraphQLList,
} = graphql;
const users = require('./users.json')
const app = express();

const userType = new GraphQLObjectType({
    name:'User',
    fields: () => ({
        email: { type: GraphQLString},
        username: { type: GraphQLString},
        name: { type: GraphQLString},
        company: { type: GraphQLString},
        address: { type: GraphQLString},
    })
})

const RootQuery = new GraphQLObjectType({
    name:'RootQueryType',
    fields: () => ({
        getAllUsers: {
            type: new GraphQLList(userType),
            resolve(parent,args){
                return users
            }
        }
    })
})

const Mutation = new GraphQLObjectType({
    name:"mutation",
    fields: () => ({
        createUser: {
            type: userType,
            args:{
                email: { type: GraphQLString},
                username: { type: GraphQLString},
                name: { type: GraphQLString},
                company: { type: GraphQLString},
                address: { type: GraphQLString},
            },
            resolve(parent,args){
                users.push({ email: args.email,
                             username: args.usename,
                             name: args.name,
                             company: args.company,
                             adress: args,company,
                })
                return args
            }
        }
    })
})

const schema = new GraphQLSchema({query: RootQuery, mutation: Mutation})

app.use('/graphql', graphqlHTTP({
    schema:schema,
    graphql:true
}))
app.listen(5000, ()=>{
    console.log('server started')
})

但是当我在浏览器中访问 localhost:5000/graphql 时，我得到： {"errors":[{"message":"必须提供查询字符串。"}]} 我尝试检查 graphqlstring 是否正确导入，一切正常我搜索了很多，我希望答案在这里。

Answer 1

你能按照here用graphiql: true, ?替换graphql: true,吗通常也尝试将端口设置为 4000

无法获取 graphql 服务器

cant fetch graphql server

javascript

node.js

graphql

express-graphql