Working on a page where content is generated programatically, I'm generate dummy paragraph entities. Unfortunately, entities are created for real (e.g. saved in database) every time I load the page.
This is caused by the call to $entity->save() in \Drupal\entity_reference_revisions\Plugin\Field\FieldType\EntityReferenceRevisionsItem::generateSampleValue.
$storage = \Drupal::entityTypeManager()->getStorage('paragraph');
$entity = $storage->createWithSampleValues('my_paragraph_type', ['parent_type' => 'node']);
// OMG the $entity is already saved! I didn't want it too be :(
Do not save the entity in generate sample value.
Review and accept the PR.
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um... While removing the line I saw why we wanted to save the entity before returning sample value. We need the `target_id` and the `target_revision_id`.
Thus I'm not sure how we can deal with this situation.
In theory and IMHO generateSampleValue should not save the entity.