我有两个函数:一个是将实体写入数据存储区,另一个是假设检索它们。当我在检索中使用datastore.GetAll()
函数时,它不返回任何结果。我有一个测试,验证写作似乎正常工作。任何关于为什么检索不起作用的想法?golang中的datastore.GetAll没有得到结果
这里是应用程序代码:
package tracker
import (
"fmt"
"appengine"
"appengine/datastore"
)
type User struct {
Email string
}
func createUser(ctx appengine.Context, email string) (*datastore.Key, error) {
u := &User{
Email: email,
}
incompleteKey := datastore.NewIncompleteKey(ctx, "User", nil)
key, err := datastore.Put(ctx, incompleteKey, u)
if err != nil {
return key, err
}
return key, nil
}
func getUser(ctx appengine.Context, email string) (u *User, e error) {
users := []User{}
q := datastore.NewQuery("User").Filter("Email", email)
keys, err := q.GetAll(ctx, &users)
if err != nil {
return nil, err
}
fmt.Printf("KEYS: %v", keys)
return &users[0], nil
}
下面是测试代码:
package tracker
import (
"fmt"
"testing"
"appengine/datastore"
"appengine/aetest"
)
// This test is passing.
func TestCreateUser(t *testing.T) {
ctx, err := aetest.NewContext(nil)
if err != nil {
t.Fatal(err)
}
defer ctx.Close()
email := "[email protected]"
newKey, err := createUser(ctx, email)
if err != nil {
t.Errorf("Failed to create a new user: %v", err)
}
u := User{}
datastore.Get(ctx, newKey, &u)
if u.Email != email {
t.Errorf("Expected email to be %s, found %v.", email, u.Email)
}
}
func TestGetUser(t *testing.T) {
ctx, err := aetest.NewContext(nil)
if err != nil {
t.Fatal(err)
}
defer ctx.Close()
email := "[email protected]"
newKey, err := createUser(ctx, email)
fmt.Printf("key, %v; ", newKey)
u, err := getUser(ctx, newKey)
fmt.Printf("user, %v; error: %s", u, err)
if u.Email != email {
t.Error("Expected email to be %s, found %v.", email, u.Email)
}
}
感谢那些工作就像一个魅力! – katkinson
@katkinson由于它的工作原因,要做的恰当事情是通过点击左侧旁边的复选标记来将答案标记为已接受。 http://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work这让未来的读者知道答案可以解决问题。 – sberry