golang: convert row sql to object - go

Question

Hello I am using pgx to use my postgres, and I have doubts as to how I can transform a row in the database into an aggregate
I am using entities and value objects
without value object it seems easy using marshal, but using value object I think it is not a good idea to have fields exported and then my question comes in, how can I convert my line into a struct of my aggregate
my aggregrate :
type Email struct {
address string
}
type Password struct {
value string
}
type Name struct {
firstName string
lastName string
}
type Person struct {
Id string
Name valueObject.Name
Email valueObject.Email
Password valueObject.Password
Created time.Time
Updated time.Time
}
func NewPerson(name valueObject.Name, email valueObject.Email, password valueObject.Password) *Person {
id := uuid.New()
return &Person{
Id: id.String(),
Name: name,
Email: email,
Password: password,
Created: time.Now(),
Updated: time.Now(),
}
}
all my value objects have a method to get the private value through a function simulating a get, I didn’t put the rest of the code of my value objects so it wouldn’t get big
func to get all rows from table:
func (r *personRepository) GetAll() (persons []*entities.Person, err error) {
qry := `select id, first_name, last_name, email, password created_at, updated_at from persons`
rows, err := r.conn.Query(context.Background(), qry)
return nil, fmt.Errorf("err")
}
If someone can give me a glimpse of how I can pass this line from the bank to a struct of my aggregate using this value object

Answer 1

You can use something like this (not yet tested and need optimization):
func (r *personRepository) GetAll() (persons []*entities.Person, err error) {
qry := `select id, first_name, last_name, email, password, created_at, updated_at from persons`
rows, err := r.conn.Query(context.Background(), qry)
var items []*entities.Person
if err != nil {
// No result found with the query.
if err == pgx.ErrNoRows {
return items, nil
}
// Error happened
log.Printf("can't get list person: %v\n", err)
return items, err
}
defer rows.Close()
for rows.Next() {
// Build item Person for earch row.
// must be the same with the query column position.
var id, firstName, lastName, email, password string
var createdAt, updatedAt time.Time
err = rows.Scan(&id, &firstName, &lastName, &email,
&createdAt, updatedAt)
if err != nil {
log.Printf("Failed to build item: %v\n", err)
return items, err
}
item := &entities.Person{
Id: id,
FirstName: firstName,
// fill other value
}
// Add item to the list.
items = append(items, item)
}
return items, nil
}
Don't forget to add the comma after text password in your query.
I am using entities and value objects without value object it seems easy using marshal,
Sorry, I don't know about the value object in your question.