public function WorkflowTransition::isValid in Workflow 8

Determines if the Transition is valid and can be executed.

@todo Add to isAllowed() ? @todo Add checks to WorkflowTransitionElement ?

Return value

bool

1 call to WorkflowTransition::isValid()

WorkflowTransition::execute in src/Entity/WorkflowTransition.php

Execute a transition (change state of an entity).

File

src/Entity/WorkflowTransition.php, line 325

Class

WorkflowTransition

Implements an actual, executed, Transition.

Namespace

Drupal\workflow\Entity

Code

public function isValid() {

  // Load the entity, if not already loaded.
  // This also sets the (empty) $revision_id in Scheduled Transitions.
  $entity = $this
    ->getTargetEntity();
  if (!$entity) {

    // @todo There is a watchdog error, but no UI-error. Is this OK?
    $message = 'User tried to execute a Transition without an entity.';
    $this
      ->logError($message);
    return FALSE;

    // <-- exit !!!
  }
  if (!$this
    ->getFromState()) {

    // @todo The page is not correctly refreshed after this error.
    $message = $this
      ->t('You tried to set a Workflow State, but
        the entity is not relevant. Please contact your system administrator.');
    $this
      ->messenger()
      ->addError($message);
    $message = 'Setting a non-relevant Entity from state %sid1 to %sid2';
    $this
      ->logError($message);
    return FALSE;

    // <-- exit !!!
  }

  // The transition is OK.
  return TRUE;
}