How do I find all objects under an object?

Question

When I try to print out the possible options of Node::load(10)

I just get null. But I know that there are options as Node::load(10)->field_name->value gives the value of the field.

I have tried using dpm as well as json_encode.

examples:

dpm(Node::load(10)->getFieldDefinitions());
dpm(Node::load(10)->toArray());
json_encode(Node::load(10))

Answer 1

I tried the following command, and it returns the expected output.

drush php-eval 'var_export(\Drupal\node\Entity\Node::load(1));'

The only case where I get NULL as output is when I pass to Node::load() a node ID that doesn't exist.

The fact Node::load() loads the data from the database doesn't matter; in fact, the method still returns an object of the Node class.

Drupal\node\Entity\Node::__set_state(array(
   'in_preview' => NULL,
   'values' => 
  array (
    'vid' => 
    array (
      'x-default' => '1',
    ),
    'langcode' => 
    array (
      'x-default' => 'en',
    ),
    'revision_timestamp' => 
    array (
      'x-default' => '1465363710',
    ),
    'revision_uid' => 
    array (
      'x-default' => '1',
    ),
    'revision_log' => 
    array (
      'x-default' => NULL,
    ),
    'nid' => 
    array (
      'x-default' => '1',
    ),
    'type' => 
    array (
      'x-default' => 'page',
    ),
    'uuid' => 
    array (
      'x-default' => '88E2D589-473B-4FE9-9A5A-F1F768A5E4E8',
    ),
    'isDefaultRevision' => 
    array (
      'x-default' => '1',
    ),
    'title' => 
    array (
      'x-default' => 'Test',
    ),
    'uid' => 
    array (
      'x-default' => '1',
    ),
    'status' => 
    array (
      'x-default' => '1',
    ),
    'created' => 
    array (
      'x-default' => '1465363684',
    ),
    'changed' => 
    array (
      'x-default' => '1465363710',
    ),
    'promote' => 
    array (
      'x-default' => '0',
    ),
    'sticky' => 
    array (
      'x-default' => '0',
    ),
    'revision_translation_affected' => 
    array (
      'x-default' => '1',
    ),
    'default_langcode' => 
    array (
      'x-default' => '1',
    ),
    'body' => 
    array (
      'x-default' => 
      array (
        0 => 
        array (
          'value' => '<p>Test.</p>
',
          'summary' => '',
          'format' => 'basic_html',
        ),
      ),
    ),
  ),
   'fields' => 
  array (
  ),
   'fieldDefinitions' => NULL,
   'languages' => NULL,
   'langcodeKey' => 'langcode',
   'defaultLangcodeKey' => 'default_langcode',
   'activeLangcode' => 'x-default',
   'defaultLangcode' => 'en',
   'translations' => 
  array (
    'x-default' => 
    array (
      'status' => 1,
    ),
  ),
   'translationInitialize' => false,
   'newRevision' => false,
   'isDefaultRevision' => '1',
   'entityKeys' => 
  array (
    'bundle' => 'page',
    'id' => '1',
    'revision' => '1',
    'uuid' => '88E2D589-473B-4FE9-9A5A-F1F768A5E4E8',
  ),
   'translatableEntityKeys' => 
  array (
    'label' => 
    array (
      'x-default' => 'Test',
    ),
    'langcode' => 
    array (
      'x-default' => 'en',
    ),
    'status' => 
    array (
      'x-default' => '1',
    ),
    'uid' => 
    array (
      'x-default' => '1',
    ),
    'default_langcode' => 
    array (
      'x-default' => '1',
    ),
  ),
   'validated' => false,
   'validationRequired' => false,
   'entityTypeId' => 'node',
   'enforceIsNew' => NULL,
   'typedData' => NULL,
   'cacheContexts' => 
  array (
  ),
   'cacheTags' => 
  array (
  ),
   'cacheMaxAge' => -1,
   '_serviceIds' => 
  array (
  ),
))

Even running drush php-eval 'var_export(\Drupal\node\Entity\Node::load(1)->toArray());' (i.e. using the toArray() method you tried) gave me an output different from NULL. In this case, using a node ID that doesn't exist, you get a Call to a member function toArray() on a non-object error.

array (
  'nid' => 
  array (
    0 => 
    array (
      'value' => '1',
    ),
  ),
  'uuid' => 
  array (
    0 => 
    array (
      'value' => '994535DB-7C4E-42F2-94CE-576DA3E9FC0B',
    ),
  ),
  'vid' => 
  array (
    0 => 
    array (
      'value' => '1',
    ),
  ),
  'langcode' => 
  array (
    0 => 
    array (
      'value' => 'en',
    ),
  ),
  'type' => 
  array (
    0 => 
    array (
      'target_id' => 'page',
    ),
  ),
  'title' => 
  array (
    0 => 
    array (
      'value' => 'Test',
    ),
  ),
  'uid' => 
  array (
    0 => 
    array (
      'target_id' => '1',
    ),
  ),
  'status' => 
  array (
    0 => 
    array (
      'value' => '1',
    ),
  ),
  'created' => 
  array (
    0 => 
    array (
      'value' => '1466285938',
    ),
  ),
  'changed' => 
  array (
    0 => 
    array (
      'value' => '1466285973',
    ),
  ),
  'promote' => 
  array (
    0 => 
    array (
      'value' => '0',
    ),
  ),
  'sticky' => 
  array (
    0 => 
    array (
      'value' => '0',
    ),
  ),
  'revision_timestamp' => 
  array (
    0 => 
    array (
      'value' => '1466285973',
    ),
  ),
  'revision_uid' => 
  array (
    0 => 
    array (
      'target_id' => '1',
    ),
  ),
  'revision_log' => 
  array (
  ),
  'revision_translation_affected' => 
  array (
    0 => 
    array (
      'value' => '1',
    ),
  ),
  'default_langcode' => 
  array (
    0 => 
    array (
      'value' => '1',
    ),
  ),
  'path' => 
  array (
  ),
  'body' => 
  array (
    0 => 
    array (
      'value' => '<p>Testing a Drupal function.</p>
',
      'summary' => '',
      'format' => 'basic_html',
    ),
  ),
)

Also, remember to fully qualify the class with its namespace, or add a use \Drupal\node\Entity\Node; line before using the class.

Using drush php-eval 'print json_encode(\Drupal\node\Entity\Node::load(1));' I just get {"in_preview":null} because json_encode() doesn't prints out all the object properties.