我有两个功能：一个将实体写入数据存储，另一个假设检索它们。当我datastore.GetAll()在检索中使用函数时，它不返回任何结果。我确实有一个测试来验证写作似乎工作正常。关于为什么检索不起作用的任何想法？
这是应用程序代码：
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
}
这是测试代码：
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 := "testing@testing.go"
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 := "testing@testing.go"
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)
}
}
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