php - Trying to add random strings in columns whenever new row added -

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i trying populate 2 columns random strings whenever new user created in laravel

maybe in user model

public function putstringindatabase () {     $this->public_key = str_random(40); }

and whenever new row added in users table public_key , private_key columns updated automatically random string

take @ model events. creating.

for example:

user::creating(function($user) {     $this->public_key = str_random(40);     $this->private_key = str_random(40); });

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