public function AutosaveFormValidator::validateForm in Autosave Form 8

Validates user-submitted form data in the $form_state.

Parameters

$form_id: A unique string identifying the form for validation, submission, theming, and hook_form_alter functions.

$form: An associative array containing the structure of the form, which is passed by reference. Form validation handlers are able to alter the form structure (like #process and #after_build callbacks during form building) in case of a validation error. If a validation handler alters the form structure, it is responsible for validating the values of changed form elements in $form_state->getValues() to prevent form submit handlers from receiving unvalidated values.

$form_state: The current state of the form. The current user-submitted data is stored in $form_state->getValues(), though form validation functions are passed an explicit copy of the values for the sake of simplicity. Validation handlers can also use $form_state to pass information on to submit handlers. For example: $form_state->set('data_for_submission', $data); This technique is useful when validation requires file parsing, web service requests, or other expensive requests that should not be repeated in the submission step.

Overrides FormValidator::validateForm

File

src/Form/AutosaveFormValidator.php, line 52

Class

AutosaveFormValidator

Provides validation of form submissions with AutosaveForm enabled.

Namespace

Drupal\autosave_form\Form

Code

public function validateForm($form_id, &$form, FormStateInterface &$form_state) {
  $autosave_submission = $this
    ->isAutosaveTriggered($form_state);
  if ($autosave_submission) {

    // On subsequent autosaving we don't need to execute the form validation
    // as we are not going to build the intermediate entity. However it might
    // happen that between here and the autosave submission handler the
    // autosaved state has been purged and therefore we have to check
    // explicitly for that there instead of building the intermediate entity.
    $form_state
      ->setTemporaryValue('autosave_form_form_validation_skipped', TRUE);
  }
  else {

    // We have to execute the validation in the case of autosave submission
    // for the very first time as in this case we'll build the intermediate
    // entity for comparison and some input values are being prepared in the
    // validate functions. This is the case with e.g. autocomplete for entity
    // references.
    $this->formValidator
      ->validateForm($form_id, $form, $form_state);
  }

  // In order for the autosave submit callback to be executed we have to
  // clear the errors caused from the validation, otherwise no submit
  // callbacks will be executed.
  if ($autosave_submission && $form_state::hasAnyErrors()) {
    $form_state
      ->clearErrors();
  }
}