Golang MySQL Scan only populate results if all fields passed - go

Question

Golang mysql row.Scan(&pointerAddress) not populating fields.
Showing me this when i send request so omitempty does work.
If I fill all User struct fields to row.Scan(&user.Email, etc...) only then show values in result.
Code :
type User struct{
Id int `json:"id"`
Email string `json:"email"`
Password string `json:"password"`
Firstname string `json:"firstname"`
Lastname string `json:"lastname"`
RememberToken string `json:"remember_token"`
Phone int64 `json:"phone"`
AgreeTerms int8 `json:"agree_terms"`
AllowPromotionalOffers int8 `json:"allow_promotional_offers"`
CreatedAt string `json:"created_at"`
UpdatedAt string `json:"updated_at"`
LandlordId int64 `json:"landlord_id"`
RenterId int64 `json:"renter_id"`
}
My Login Function :
func Login(w http.ResponseWriter, r *http.Request) {
user := models.User{}
err := json.NewDecoder(r.Body).Decode(&user)
if err != nil {
fmt.Println(err)
}
row, err := database.DB.Query("SELECT * FROM users WHERE email=?", user.Email)
if err != nil {
fmt.Errorf("%w", err)
}
defer row.Close()
for row.Next() {
err = row.Scan(&user.Id, &user.Email, &user.Password)
if err != nil {
fmt.Errorf("%w", err)
}
}
err = json.NewEncoder(w).Encode(user)
if err != nil {
fmt.Errorf("%w", err)
}
}

Answer 1

Try to initialize your struct inside the for statement, if your resultset is a query rows (maybe a slices of structs):
var users []*models.User
for row.Next() {
user := new(models.User)
err = row.Scan(&user.Id, &user.Email, &user.Password)
users = append(users, user)
if err != nil {
fmt.Errorf("%w", err)
}
}
......
You don't need to loop if you're using a QueryRow resultSet
row, err := database.DB.QueryRow("SELECT id, email, password FROM users WHERE email=?",
user.Email).Scan(&user.Id, &user.Email, &user.Password)
As the best practice, you should avoid using "*" if not essential. ;)
It's a little verbose but it works.