field 'conds.ids' => {
  error    => { code => 'CONDS_IDS', details => 'Validation error on conds.ids' },
  required => 1,
  validation => sub {
      my ( $self, $this_field, $all_params ) = @_;
      if (
        $this_field->{value}
        &&
        ( ref( $this_field->{value} ) eq 'ARRAY' )
        ) {
        return 1;
      }
      return 0;
    }
};