搭建GraphQL服务

js版

GraphQL在 NodeJS 服务端中使用最多

安装graphql-yoga:

npm install graphql-yoga

新建index.js:

const {GraphQLServer} = require("graphql-yoga")


const server = new GraphQLServer({
    typeDefs: `
    type Query {
        hello(name:String):String!
        } 
    `,

    resolvers: {
        Query: {
            hello: (parent, {name}, ctx) => {
                return `${name},你好！`;
            }
        }
    }
})


server.start({
    port: 4600
}, ({port}) => {
    console.log(`服务器已启动，请访问： http://localhost:${port}`);
})

node index.js 运行

点击链接 进入playground：

query{
  hello(name:"dashen")
}

参考自 5分钟快速搭建一个Graphql服务器^[1]^

---

Golang版

入门教程^[2]^

Go常用的GraphQL服务端库^[3]^

graphql-go/graphql^[4]^项目的demo:

(文档点此^[5]^)

package main

import (
 "encoding/json"
 "fmt"
 "log"

 "github.com/graphql-go/graphql"
)

func main() {
 // Schema
 fields := graphql.Fields{
  "hello": &graphql.Field{
   Type: graphql.String,
   Resolve: func(p graphql.ResolveParams) (interface{}, error) {
    return "world", nil
   },
  },
 }
 rootQuery := graphql.ObjectConfig{Name: "RootQuery", Fields: fields}
 schemaConfig := graphql.SchemaConfig{Query: graphql.NewObject(rootQuery)}
 schema, err := graphql.NewSchema(schemaConfig)
 if err != nil {
  log.Fatalf("failed to create new schema, error: %v", err)
 }

 // Query
 query := `
  {
   hello
  }
 `
 params := graphql.Params{Schema: schema, RequestString: query}
 r := graphql.Do(params)
 if len(r.Errors) > 0 {
  log.Fatalf("failed to execute graphql operation, errors: %+v", r.Errors)
 }
 rJSON, _ := json.Marshal(r)
 fmt.Printf("%s \n", rJSON) // {"data":{"hello":"world"}}
}

执行输出

{"data":{"hello":"world"}}

基于此项目的实践，参考

Graphql Go 基于Golang实践^[6]^

代码^[7]^

参考资料

[1]

5分钟快速搭建一个Graphql服务器: https://www.bilibili.com/video/BV1db41137BT
[2]

入门教程: https://graphql.cn/learn/
[3]

Go常用的GraphQL服务端库: https://graphql.cn/code/#go
[4]

graphql-go/graphql: https://github.com/graphql-go/graphql
[5]

文档点此: https://pkg.go.dev/github.com/graphql-go/graphql
[6]

Graphql Go 基于Golang实践: https://www.jianshu.com/p/16719baa1713
[7]

代码: https://github.com/gopherteam/graphql-server-go

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