public function InOperator::validate in Drupal 8

Same name and namespace in other branches

1. 9 core/modules/views/src/Plugin/views/filter/InOperator.php \Drupal\views\Plugin\views\filter\InOperator::validate()
2. 10 core/modules/views/src/Plugin/views/filter/InOperator.php \Drupal\views\Plugin\views\filter\InOperator::validate()

Validate that the plugin is correct and can be saved.

Return value

An array of error strings to tell the user what is wrong with this plugin.

Overrides FilterPluginBase::validate

File

core/modules/views/src/Plugin/views/filter/InOperator.php, line 417

Class

InOperator

Simple filter to handle matching of multiple options selectable via checkboxes

Namespace

Drupal\views\Plugin\views\filter

Code

public function validate() {
  $this
    ->getValueOptions();
  $errors = parent::validate();

  // If the operator is an operator which doesn't require a value, there is
  // no need for additional validation.
  if (in_array($this->operator, $this
    ->operatorValues(0))) {
    return [];
  }
  if (!in_array($this->operator, $this
    ->operatorValues(1))) {
    $errors[] = $this
      ->t('The operator is invalid on filter: @filter.', [
      '@filter' => $this
        ->adminLabel(TRUE),
    ]);
  }
  if (is_array($this->value)) {
    if (!isset($this->valueOptions)) {

      // Don't validate if there are none value options provided, for example for special handlers.
      return $errors;
    }
    if ($this->options['exposed'] && !$this->options['expose']['required'] && empty($this->value)) {

      // Don't validate if the field is exposed and no default value is provided.
      return $errors;
    }

    // Some filter_in_operator usage uses optgroups forms, so flatten it.
    $flat_options = OptGroup::flattenOptions($this->valueOptions);

    // Remove every element which is not known.
    foreach ($this->value as $value) {
      if (!isset($flat_options[$value])) {
        unset($this->value[$value]);
      }
    }

    // Choose different kind of output for 0, a single and multiple values.
    if (count($this->value) == 0) {
      $errors[] = $this
        ->t('No valid values found on filter: @filter.', [
        '@filter' => $this
          ->adminLabel(TRUE),
      ]);
    }
  }
  elseif (!empty($this->value) && ($this->operator == 'in' || $this->operator == 'not in')) {
    $errors[] = $this
      ->t('The value @value is not an array for @operator on filter: @filter', [
      '@value' => var_export($this->value, TRUE),
      '@operator' => $this->operator,
      '@filter' => $this
        ->adminLabel(TRUE),
    ]);
  }
  return $errors;
}