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, $this->operatorValues(0))) {
return array();
}
if (!in_array($this->operator, $this->operatorValues(1))) {
$errors[] = $this->t('The operator is invalid on filter: @filter.', array('@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.', array('@filter' => $this->adminLabel(TRUE)));
}
} elseif (!empty($this->value) && ($this->operator == 'in' || $this->operator == 'not in')) {
$errors[] = $this->t('The value @value is not an array for @operator on filter: @filter', array('@value' => var_export($this->value), '@operator' => $this->operator, '@filter' => $this->adminLabel(TRUE)));
}
return $errors;
}