webp/models/graphql.go

package models

import (
	"fmt"
	"strings"

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

func NewSchema() (graphql.Schema, error) {
	user := graphql.NewObject(graphql.ObjectConfig{
		Name: "User",
		Fields: graphql.Fields{
			"id":          &graphql.Field{Type: graphql.Int},
			"user_name":   &graphql.Field{Type: graphql.String},
			"avatar":      &graphql.Field{Type: graphql.String},
			"rank":        &graphql.Field{Type: graphql.String},
			"price":       &graphql.Field{Type: graphql.Float},
			"create_time": &graphql.Field{Type: graphql.DateTime},
			"update_time": &graphql.Field{Type: graphql.DateTime},
		},
	})

	users := &graphql.Field{
		Type: graphql.NewList(user),
		Args: graphql.FieldConfigArgument{
			"id":          &graphql.ArgumentConfig{Type: graphql.Int},
			"user_name":   &graphql.ArgumentConfig{Type: graphql.String},
			"avatar":      &graphql.ArgumentConfig{Type: graphql.String},
			"rank":        &graphql.ArgumentConfig{Type: graphql.String},
			"create_time": &graphql.ArgumentConfig{Type: graphql.DateTime},
			"update_time": &graphql.ArgumentConfig{Type: graphql.DateTime},
		},
		Resolve: func(p graphql.ResolveParams) (interface{}, error) {
			var fields []string
			requestedFields := p.Info.FieldASTs[0].SelectionSet.Selections
			for _, field := range requestedFields {
				fieldAST, ok := field.(*ast.Field)
				if ok {
					fields = append(fields, fieldAST.Name.Value)
				}
			}
			fields_str := strings.Join(fields, ",")

			var where []string
			if p.Args["id"] != nil {
				where = append(where, fmt.Sprintf("id=%d", p.Args["id"]))
			}
			if p.Args["user_name"] != nil {
				where = append(where, fmt.Sprintf("user_name='%s'", p.Args["user_name"]))
			}

			// 筛选条件
			where_str := strings.Join(where, " AND ")
			fmt.Println(where_str)

			var query strings.Builder
			query.WriteString(fmt.Sprintf("SELECT %s FROM web_member WHERE %s LIMIT %s", fields_str, where_str, "10"))
			fmt.Println(query.String())

			var users []User
			if err := connection.Select(&users, query.String()); err != nil {
				fmt.Println("获取用户列表失败", err)
				return nil, err
			}
			fmt.Println(users)
			return users, nil
		},
	}

	image := graphql.NewObject(graphql.ObjectConfig{
		Name: "Image",
		Fields: graphql.Fields{
			"id":                      &graphql.Field{Type: graphql.Int},
			"width":                   &graphql.Field{Type: graphql.Int},
			"height":                  &graphql.Field{Type: graphql.Int},
			"content":                 &graphql.Field{Type: graphql.String},
			"article_category_top_id": &graphql.Field{Type: graphql.Int},
			"praise_count":            &graphql.Field{Type: graphql.Int},
			"collect_count":           &graphql.Field{Type: graphql.Int},
			"create_time":             &graphql.Field{Type: graphql.DateTime},
			"update_time":             &graphql.Field{Type: graphql.DateTime},
			"user": &graphql.Field{
				Type: user,
			},
		},
	})

	images := &graphql.Field{
		Type: graphql.NewList(image),
		Args: graphql.FieldConfigArgument{
			"id": &graphql.ArgumentConfig{
				Type: graphql.Int,
			},
		},
		Resolve: func(p graphql.ResolveParams) (interface{}, error) {
			fmt.Println("p.Args:", p.Args)

			//connection.Query("SELECT ")

			return []interface{}{
				map[string]interface{}{
					"id":                      1,
					"width":                   100,
					"height":                  100,
					"content":                 "content",
					"article_category_top_id": 1,
					"praise_count":            1,
					"collect_count":           1,
					"create_time":             "2018-01-01 00:00:00",
					"update_time":             "2018-01-01 00:00:00",
					"user": map[string]interface{}{
						"id":     1,
						"name":   "user1",
						"age":    10,
						"info":   "info",
						"price":  1.1,
						"avatar": "",
					},
				},
				map[string]interface{}{
					"id":                      2,
					"width":                   100,
					"height":                  100,
					"content":                 "content",
					"article_category_top_id": 1,
					"praise_count":            1,
					"collect_count":           1,
					"create_time":             "2018-01-01 00:00:00",
					"update_time":             "2018-01-01 00:00:00",
					"user": map[string]interface{}{
						"id":     2,
						"name":   "user2",
						"age":    20,
						"info":   "info",
						"price":  2.2,
						"avatar": "",
					},
				},
			}, nil
		},
	}

	rootQuery := graphql.ObjectConfig{Name: "RootQuery", Fields: graphql.Fields{
		"users":  users,
		"images": images,
	}}
	schemaConfig := graphql.SchemaConfig{Query: graphql.NewObject(rootQuery)}
	schema, err := graphql.NewSchema(schemaConfig)
	if err != nil {
		return schema, err
	}
	return schema, nil
}