Laravel one to one relationship. Save username from table to another table - php

Question

TLDR: How do I create a relationship from one table to another? For example, I want changes from the user table automatically reflect on to the supplier table? Something like it's just referencing from the user table.
I have this 2 tables
========================
USER table
1. id
2. username
3. password
4. name
========================
and
========================
SUPPLIER table
1. id
2. username
3. name
========================
Every time I add a new user, it should automatically be saved into the supplier table. This is what I did:
function saveUser($postdata) {
$newUser= new \App\UserModel;
$newUser->email = $postdata['email'];
$newUser->password = $postdata['password'];
$newUser->name = $postdata['name'];
$newUser->save();
$this->saveSupplier($postdata['email'], $postdata['name']);
}
function saveSupplier($email, $name) {
$newSupplier = new \App\SupplierModel;
$newSupplier->email = $email;
$newSupplier->name = $name;
$newSupplier->save();
}
You see, it's not in a relationship right. It's just like manually saving into two tables. How do I make the Supplier table dependent on the user table? For example, everytime I make changes in the User table, it will automatically reflect on to suppliers table without having to fire an update method.

Answer 1

One way to achieve this would be to register and event in the boot method of your
User model.
protected static function boot()
{
parent::boot();
static::created(function($user) {
Supplier::create([
'username' => $user->username //or email or whatever you have.
'name' => $user->name
]);
});
}

Answer 2

Do you might be interested in triggers. If you can create triggers you can use them to insert into SUPPLIER every time you insert in USER.
Something like:
CREATE TRIGGER t_reflect_changes_user_supplier
AFTER INSERT
ON USER FOR EACH ROW
BEGIN
-- trigger code
INSERT INTO SUPPLIER (username,name) VALUES new.username,new.name
END;