Programmatically update node image field (using URI of the image) and get URL in twig

Question

I am trying to update a node image field programmatically. I currently loading the node like this:

$node = Node::Load(1);

have the URI if the image that I want to set. I have tried this but no luck:

$node->set('field_image_head', array('#uri' => $imageUri));

1. How do I now update the node image with an image URI?
2. The twig will need to get the URL from the image field like so
   {{ file_url(node.field_image_head.entity.fileuri}}

Answer 1

You have to create a file for the image first before you can add it to the node.

use Drupal\node\Entity\Node;
use Drupal\file\Entity\File;

  $node = Node::load(1);
  $uri = 'public://image.jpg';

  // check first if the file exists for the uri    
  $files = \Drupal::entityTypeManager()
    ->getStorage('file')
    ->loadByProperties(['uri' => $uri]);
  $file = reset($files);

  // if not create a file
  if (!$file) {
    $file = File::create([
      'uri' => $uri,
    ]);
    $file->save();
  }

  $node->field_image[] = [
    'target_id' => $file->id(),
    'alt' => 'Alt text',
    'title' => 'Title',
  ];

  $node->save();