I have created a block plugin.


 * Provides a 'Download component' block.
 * @Block(
 *   id = "my_custom_block",
 *   admin_label = @Translation("My custom block"),
 * )
class Myblock extends BlockBase {
  // Other code

The above block has a settings form also where I am uploading some files to the block.

I placed this block in two different regions on a page with different settings. (Uploaded different files)

Now I want to update the content of one of them i-e add a new file programmatically.

How will I do that? Because I can't load the block and update the field and save the block again because both returns me the same id my_custom_block.


And also this returns me null.

Any idea how will I do that? Just like we update the nod entity, I want to update an instance of this block plugin.

Updated code:

I get the block like this

$node = \Drupal::routeMatch()->getParameter('node');
 if ($node instanceof \Drupal\node\NodeInterface) {
    /** @var \Drupal\layout_builder\Field\LayoutSectionItemList $layout */
    $layout = $node->get('layout_builder__layout');
    $block = $layout->getSection(0)->getComponent('1bb8e7b4-8253-40bc-a1f9-7f02e90edb2f')->getPlugin();
    $block->setConfigurationValue('file', ['6338, 6336']);

Now how will I save the node using the block new configuration values?

I tried this.


1 Answer 1


Placed blocks are stored in the config entity block. The IDs are more or less unpredictable but you can load the blocks by specifying properties:

$entity_type_manager = \Drupal::entityTypeManager();
$blocks = $entity_type_manager->getStorage('block')->loadByProperties([
  'plugin' => 'my_custom_block',
  'region' => $region,
  'theme'  => $theme,

A code example to load all blocks placed for the custom block plugin, do some checks and modify the settings:

$entity_type_manager = \Drupal::entityTypeManager();
$blocks = $entity_type_manager->getStorage('block')->loadByProperties([
  'plugin' => 'my_custom_block',

foreach ($blocks as $block) {
  if ($block->getRegion() == 'my_region') {
    $settings = $block->get('settings');
    // modify settings
    $block->set('settings', $settings);
  • How will I get the the region of the block instance. I am using layout builder.
    – Ahmad
    Oct 28, 2020 at 9:47
  • If you don't know the region when you query the blocks you can check that later. See the second code example.
    – 4uk4
    Oct 28, 2020 at 9:59
  • Layout modules can store block configuration in different places. If you don't find the placed block with this method I would export the config and search for the plugin id in the config YAML files to locate the config object.
    – 4uk4
    Oct 28, 2020 at 10:08
  • This will not work if I place two instances in the same region?
    – Ahmad
    Oct 28, 2020 at 10:21
  • The first loadByProperties() example returns then both instances.
    – 4uk4
    Oct 28, 2020 at 10:26

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