Cannot access parent entity in hook_entity_create

+1 to this. I also have issues loading the temporary parent node entity in hook_field_widget_single_element_form_alter()

This work around for now is to use : $node = $parent_entity = $form_state->getFormObject()->getEntity();

Sample code below shows how to set the form default values as you enter paragraphs depending on how many.

/**
 * Implements hook_field_widget_single_element_PLUGIN_ID_form_alter().
 *
 * @see \Drupal\Core\Field\WidgetBase::formSingleElement()
 */
function my_module_field_widget_single_element_string_textfield_form_alter(array &$element, FormStateInterface $form_state, array $context) {
  $field_name = $context['items']->getName();
  $default_value = 'My default value to compare';
  if (($field_name == 'field_my_text_field')
    && ($context['items']->getEntity()->getEntityTypeId() == 'paragraph')
    && ($context['items']->getEntity()->bundle() == 'my_paragraph_type')) {
    $field_parents_no_subform = array_slice($element['#field_parents'], 0, -2);
    $parent_field_name = end($field_parents_no_subform);
    // Don't use $context['items']->getEntity()->getParentEntity()
    // it gets the current database node not the form temp node.
    // @see https://www.drupal.org/project/paragraphs/issues/3255456
    $parent_entity = $form_state->getFormObject()->getEntity();
    // Change new fields default to empty, by 
    if ($parent_entity->hasField($parent_field_name)) {
      $values = $parent_entity->get($parent_field_name)->getValue();
      if ((count($values) > 1) && ($element['value']['#default_value'] == $default_value)) {
        $element['value']['#default_value'] = '';
      }
    }
    // Change existing fields from default to empty.
    $input = $form_state->getUserInput();
    if (isset($input[$parent_field_name])) {
      $field_structure = array_merge(
        $element['#field_parents'],
        [
          $field_name,
          '0',
          'value',
        ]
      );
      // Get Value at
      // $input['field_parent'][$context['delta']]['subform'][$field_name]['0']['value'];.
      $current_value = NestedArray::getValue($input, $field_structure);
      if ($current_value == $default_value) {
        NestedArray::setValue($input, $field_structure, '');
        $form_state->setUserInput($input);
      }
    }
  }
}

Had the same "issue" when trying to alter the paragraphs field options in the allowed_values_function callback based on the parent entity. (node)

MR 46 worked great

The MR seems sensible but needs to be rebased.

dieterholvoet → changed the visibility of the branch 3255456-cannot-access-parent to hidden.

Rebased! Not sure what that test failure is about.

Adding a patch for paragraphs 8.x-1.17, using Drupal 10.3, as the current patch does not apply to this version.

I encountered this issue also when trying to use a form alter to change the paragraph's form based on its parent. I could do it for existing paragraphs but not when adding new ones.

Using module 1.19 and Drupal 10.4

Tried patch from #14 and it cannot be applied.

Tried patch from #11 and it applied.

In neither case, however, could the parentEntity be loaded when adding a new paragraph.

My problem comes from using Layout Paragraphs module it seems. Switching from Layout Paragraphs field formatter to default Paragraphs (stable) formatter and I can see `getParentEntity()` returning value as expected. Switching back to Layout Paragraphs formatter and `getParentEntity()` value is gone.

Adding link to the related issue in Layout Paragraphs queue 🐛 Paragraph parent entity property is empty when adding new paragraphs Needs review and will update over there as well with presence of new patches.

For anyone finding this issue here, the MR from #11 above along with patch from #3 in Layouts Paragraph issue here -- https://www.drupal.org/project/layout_paragraphs/issues/3352822#comment-... 🐛 Paragraph parent entity property is empty when adding new paragraphs Needs review -- makes `getParentEntity()` work with Layout Paragraphs as well.

Hello,

In the current version of the merge request, a 500 error occurs when you try to insert a paragraph from a content creation form.
It tries to load the content, but it doesn't exist yet.