public function search($input)
{
$query = Location::query();
$columns = Schema::getColumnListing('locations');
$attributes = array();
foreach ($columns as $attribute) {
if (isset($input[$attribute]) and !empty($input[$attribute])) {
$query->where($attribute, $input[$attribute]);
$attributes[$attribute] = $input[$attribute];
} else {
$attributes[$attribute] = null;
}
}
return [$query->get(), $attributes];
}