搭建GraphQL服务

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}`);
})

query{
  hello(name:"dashen")
}

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"}}
}