Игорь

class CityFactory extends Factory
{
  protected $model = City::class;
  public function definition()
  {
    $tz = array_keys(Timezone::getData());
    return [
      'name'     => $this->faker->city,
      'timezone' => $this->faker->randomElement($tz),
      'enabled'  => true,
    ];
  }
}

use Illuminate\Database\Eloquent\Factories\Sequence;
class CitySeeder extends Seeder
{
  public function run()
  {
    $predefinedCities = array_reverse($this->getPredefinedCities());
    City::factory(CITY_COUNT)
      ->state(new Sequence(function () use (&$predefinedCities) {
        return array_pop($predefinedCities) ?? [];
      }))
      ->create();
  }

  private function getPredefinedCities()
  {
    return [
      [
        'name'         => 'Moscow',
        'timezone'     => '+0300',
        'enabled'      => true,
      ],
      [
        'name'         => 'Saint-Petersburg',
        'timezone'     => '+0300',
        'enabled'      => true,
      ],
      [
        'name'         => 'Sochi',
        'timezone'     => '+0300',
        'enabled'      => true,
      ],
    ];
  }
}

Model1::whereHas('model2', function ($query){
    $query->whereRaw('number',  '>',   'model1.number+10')
});

document.dispatchEvent(new CustomEvent('af_complete;))

dd if=/dev/zero of=/userdisk.fs bs=1024 count=100000
mkfs.ext3 /userdisk.fs
mount -t ext3 -o loop /userdisk.fs /home/user

umount /home/user
shred /userdisk.fs

<form role="form" id="form" action="catalog/vse-tovaryi/" data-def="catalog/vse-tovaryi/">
  <select name="ms|price">
      <option value="">Любая</option>
      <option value="500">500 рублей</option>
  </select>
        <select name="msoption|tags">
      <option value="1">Тэг 1</option>
      <option value="2">Тэг 2</option>
  </select>

  <button type="submit">Подобрать</button>
</form>

window.onload = function () {
	var form = $('#form'), def = form.data('def'), data = {}, action;
  
  $(document).on('change', '#form select', function () {
  	var el = $(this), val = el.val(), name = el.attr('name');
    if (val) {
    	data[name] = val;
    } else {
      delete data[name];
    }
    action = def + "?";
    for(var i in data) {
      action += i + "=" + data[i] + '&';
    }
    action = action.substr(0, action.length - 1);
    form.attr('action', action);
  });
};