goonchk.go

package goonchk

import (
	"fmt"
	"net/http"

	"github.com/mjibson/goon"

	"google.golang.org/appengine/datastore"
)

type User struct {
	Id   string `datastore:"-" goon:"id"`
	Name string
}

func init() {
	http.HandleFunc("/", handler)
}

func handler(w http.ResponseWriter, r *http.Request) {
	oldid := "old"
	g := goon.NewGoon(r)
	olduser := &User{Id: oldid}
	oldkey, err := g.Put(olduser)
	if err != nil {
		http.Error(w, fmt.Sprintf("err g.Put for olduser, %s", err.Error()), 500)
		return
	}

	var kl []*datastore.Key
	kl = append(kl, oldkey)
	err = g.DeleteMulti(kl)
	if err != nil {
		http.Error(w, fmt.Sprintf("err g.DeleteMulti, %s", err.Error()), 500)
		return
	}

	newid := "new"
	newuser := &User{Id: newid}
	_, err = g.Put(newuser)
	if err != nil {
		http.Error(w, fmt.Sprintf("err g.Put for newuser, %s", err.Error()), 500)
		return
	}

	err = g.Get(olduser)
	if err == datastore.ErrNoSuchEntity {
		// nop
	} else if err != nil {
		http.Error(w, fmt.Sprintf("err g.Get for olduser, %s", err.Error()), 500)
		return
	}

	w.WriteHeader(http.StatusOK)
}