使用graphql-go如何处理给定api中的嵌套对象会在解析器中返回以下内容
{ id：“ 34”， 名称：“某物”， 区域：{ id：34， 名称：“圣何塞” } }
我们如何为区域实施： “区域”：＆graphql.Field { 类型：graphql。??， }
答案 0 :(得分：0)
以下是使用SELECT count()
FROM default.TestDict
/* result
┌─count()─┐
│ 27742 │
└─────────┘
*/
的示例：
github.com/graphql-go/graphql v0.7.9使用package main
import (
"encoding/json"
"fmt"
"net/http"
"github.com/graphql-go/graphql"
)
type region struct {
ID int `json:"id"`
Name string `json:"name"`
}
type user struct {
ID string `json:"id"`
Name string `json:"name"`
Region region `json:"region"`
}
var aRegion = region{ID: 34, Name: "San jose"}
var aUser = user{ID: "34", Name: "something", Region: aRegion}
var regionType = graphql.NewObject(graphql.ObjectConfig{
Name: "Region",
Fields: graphql.Fields{
"id": &graphql.Field{Type: graphql.Int},
"name": &graphql.Field{Type: graphql.String},
},
})
var userType = graphql.NewObject(graphql.ObjectConfig{
Name: "User",
Fields: graphql.Fields{
"id": &graphql.Field{Type: graphql.String},
"name": &graphql.Field{Type: graphql.String},
"region": &graphql.Field{
Type: regionType,
Resolve: func(p graphql.ResolveParams) (interface{}, error) {
source, ok := p.Source.(user)
fmt.Printf("%#v\n", source)
fmt.Println("ok:", ok)
return source.Region, nil
},
},
},
})
var queryType = graphql.NewObject(graphql.ObjectConfig{
Name: "Query",
Fields: graphql.Fields{
"user": &graphql.Field{
Type: userType,
Resolve: func(p graphql.ResolveParams) (interface{}, error) {
return aUser, nil
},
},
},
})
func executeQuery(query string, schema graphql.Schema) *graphql.Result {
result := graphql.Do(graphql.Params{
Schema: schema,
RequestString: query,
})
if len(result.Errors) > 0 {
fmt.Printf("wrong result, unexpected errors: %v", result.Errors)
}
return result
}
func main() {
var schema, _ = graphql.NewSchema(graphql.SchemaConfig{
Query: queryType,
})
http.HandleFunc("/graphql", func(w http.ResponseWriter, r *http.Request) {
result := executeQuery(r.URL.Query().Get("query"), schema)
json.NewEncoder(w).Encode(result)
})
fmt.Println("Now server is running on port 8080")
fmt.Println("Access the web app via browser at 'http://localhost:8080'")
http.ListenAndServe(":8080", nil)
}
发送GraphQL请求：
curl服务器日志：
~ curl -g 'http://localhost:8080/graphql?query={user{id,name,region{id,name}}}'
{"data":{"user":{"id":"34","name":"something","region":{"id":34,"name":"San jose"}}}}