/** * Run the migrations. * * @return void */ public function up() { //get all users $users = User::all(); // and update new field external_identifier with member id foreach ($users as $user) { $email = $user->external_id; $member = Member::where('Email', '=', $email)->first(); if (!is_null($member)) { $user->external_identifier = $member->ID; $user->save(); } } }