Google App Engine 데이터 저장소 쿼리를 효과적으로 필터링하고 일관된 결과를 보장하는 방법은 무엇입니까?

// Incorrect approach:
q := datastore.NewQuery("employee")
q.Filter("Name =", "Andrew W") // Filter not applied

// Correct approach:
q := datastore.NewQuery("employee").Filter("Name =", "Andrew W")

time.Sleep(time.Second)

var e2 Employee
q := datastore.NewQuery("employee").Filter("Name =", "Andrew W")
// Rest of your code...

// Create a fictional ancestor key
ancestorKey := datastore.NameKey("EmployeeGroup", "", nil)

// Create a key with the ancestor key
key := datastore.NameKey("Employee", "Andrew W", ancestorKey)

// Create an employee entity with the key
employee := &Employee{
    Name: "Andrew W",
    // Other fields...
}

// Put the entity with the ancestor key
_, err := datastore.Put(c, key, employee)
if err != nil {
    // Handle error
}

// Query for entities with the ancestor key
q := datastore.NewQuery("Employee").Ancestor(ancestorKey)
results, err := q.GetAll(c, &[]Employee{})
if err != nil {
    // Handle error
}