levmyshkin

<?php

// Create node programmatically.
use \Drupal\node\Entity\Node;
 
$node = Node::create([
  'type'        => 'article',
  'title'       => 'Druplicon test',
]);
$node->save();

levmyshkin

<?php

$my_paragraph = null;
  
foreach ($node->get('field_paragraph_reference') as $paragraph) {
  if ($paragraph->entity->getType() == 'your_paragraph_type') {  
    $my_paragraph = $paragraph->entity;
  }
}
  

levmyshkin

<?php

// You can get multiple values from reference fields and process them through foreach:
foreach ($node->field_my_entity_reference as $reference) {  
  print $reference->target_id;  
  print $reference->entity->title->value;  
}

// Modifying an entity reference multiple field:
$nids = [3,4,5,6];  

levmyshkin

<?php

//Getting a file by ID:
$fid = 42; 
$file_storage = \Drupal::entityTypeManager()->getStorage('file');
$file = $file_storage->load($fid);

// Getting the file object from the node field:
$file = $node->field_image->entity;

levmyshkin

<?php

// Load node by nid:
$nid = 234; 
$node_storage = \Drupal::entityTypeManager()->getStorage('node');
$node = $node_storage->load($nid);

// Get node id:
$nid = $node->id();

levmyshkin

<?php
// modules/custom/drupalbook/src/Form/MultiStepForm.php
namespace Drupal\drupalbook\Form;

use Drupal\Core\Form\FormBase;
use Drupal\Core\Form\FormStateInterface;

class MultiStepForm extends FormBase
{

levmyshkin

<?php

/**
 * Implements hook_form_alter().
 */
function drupalbook_form_alter(&$form, \Drupal\Core\Form\FormStateInterface $form_state, $form_id) {
  if ($form_id == 'drupalbook_admin_settings') {
    $form['drupalbook_api_key']['#attributes']['placeholder'] = 'API key';
    $form['drupalbook_api_client_id']['#attributes']['placeholder'] = 'API client ID';

levmyshkin

<?php
// /modules/custom/drupalbook/src/Form/DrupalbookSettingsForm.php
namespace Drupal\drupalbook\Form;
 
use Drupal\Core\Form\ConfigFormBase;
use Drupal\Core\Form\FormStateInterface;
 
/**
 * Configure example settings for this site.
 */

levmyshkin

<?php
//modules/custom/drupalbook/src/Controller/DisplayNode.php
 
namespace Drupal\drupalbook\Controller;
 
use Drupal\Core\Access\AccessResult;
use Drupal\node\NodeInterface;
 
/**
 * Provides route responses for the DrupalBook module.

levmyshkin

<?php

/**
 * @file /modules/custom/drupalbook/src/Controller/FirstPageController.php
 */

namespace Drupal\drupalbook\Controller;
 
/**
 * Provides route responses for the DrupalBook module.