public function run()
{
$faker = Faker\factory::create();
$users = User::lists('id')->All();
$challenges = Challenge::lists('id')->All();
$questions = Question::lists('id')->All();
$options = Option::lists('id')->All();
foreach (range(1, 5) as $index) {
User::create(['user_id' => $faker->randomElement($users), 'challenge_id' => $faker->randomElement($challenges), 'active' => $faker->numberBetween($min = 0, $max = 1)]);
}
}
