Drupal 8 form element with #autocreate taxonomy term - php

Question

I made module with form, that use autocomplete field like that:
$form['field_taxonomy_tags'] = [
'#type' => 'entity_autocomplete',
'#target_type' => 'taxonomy_term',
'#selection_settings' => [
'target_bundles' => array('tags'),
],
'#autocreate' => array(
'target_bundles' => array('tags'),
'bundle' => ('tags'),
),
'#title' => ('tags'),
'#tags' => TRUE,
];
Autocomplete works fine, and i can add taxonomy terms from tags vocabulary easily. But there is some problem with #autocreate option i think. Have searched all documentation, and code inside drupal core. Entity is never created ;/
When i try to get value from this field, my browser is dead... there is some entity type variable, but huge.
After some debugging i found way to get it work, but im not happy about it :) Very strange, maybe some of you guys can help me to find better way?
public function submitForm(array &$form, FormStateInterface $form_state) {
$tags = $form_state->getValue('field_taxonomy_tags');
foreach ($tags as $tag)
{
if(is_object($tag['entity']))
{
$tag['entity']->save();
}
}
}
As you can see, I need to save those tags manually, dont know why ;/ Without it, there is no term created.

Answer 1

It is better way. I dont need to save every tag, its enough if we attach them to a node. Its entity object, that can be passed as node value, and after that, all tags will be created:
$node = Node::create(array(
'type' => 'YOUR_content_type',
'title' => $form_state->getValue('title')
));
$fieldNames = array_keys($node->getFieldDefinitions());
$values = $form_state->getValues();
// be aware with that, i use this loop for testing because i have same names
// you can use $node->set('content type field name', $value); directly without any field definitions
foreach ($values as $key=>$value)
{
if(in_array($key, $fieldNames))
{
$node->set($key, $value);
}
}
// here we save all data, taxonomy entities too
$node->save();