我有兩個函數:一個是將實體寫入數據存儲區,另一個是假設檢索它們。當我在檢索中使用datastore.GetAll()
函數時,它不返回任何結果。我有一個測試,驗證寫作似乎正常工作。任何關於爲什麼檢索不起作用的想法?golang中的datastore.GetAll沒有得到結果
這裏是應用程序代碼:
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
}
下面是測試代碼:
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)
}
}
感謝那些工作就像一個魅力! – katkinson
@katkinson由於它的工作原因,要做的恰當事情是通過點擊左側旁邊的複選標記來將答案標記爲已接受。 http://meta.stackexchange.com/questions/5234/how-does-accepting-an-answer-work這讓未來的讀者知道答案可以解決問題。 – sberry