$product_accounts = $product->accounts()->orderby('id')->pluck('id')->toArray();
$this->available_accounts = Account::all()->pluck('id');
$accounts_array = [];
foreach ($this->available_accounts as $account) {
if (in_array($account, $product_accounts)) {
$accounts_array[] = $account;
} else {
$accounts_array[] = false;
}
}
$this->accounts = $accounts_array;