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<?php |
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namespace Drupal\easy_entity_reader\Converters; |
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use Drupal\Core\Field\FieldItemInterface; |
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use Drupal\Core\Field\Plugin\Field\FieldType\EntityReferenceItem; |
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use Drupal\easy_entity_reader\EntityWrapper; |
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use Drupal\Core\Entity\EntityTypeManagerInterface; |
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use Drupal\file\Plugin\Field\FieldType\FileItem; |
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/** |
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* Convert the file item class to value. |
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* |
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* Class FileItemConverter. |
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*/ |
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class FileItemConverter implements ConverterInterface |
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{ |
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/** |
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* @var EntityWrapper |
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*/ |
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private $entityWrapper; |
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/** |
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* @var EntityTypeManagerInterface |
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*/ |
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private $entityManager; |
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/** |
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* @param EntityWrapper $entityWrapper |
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* @param EntityTypeManagerInterface $entityManager |
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*/ |
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public function __construct(EntityWrapper $entityWrapper, |
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EntityTypeManagerInterface $entityManager) |
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{ |
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$this->entityWrapper = $entityWrapper; |
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$this->entityManager = $entityManager; |
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} |
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/** |
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* @param FieldItemInterface $value |
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*/ |
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public function convert(FieldItemInterface $value) |
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{ |
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$node = null; |
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$values = $value->getValue(); |
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$type = str_replace('default:', '', $value->getParent()->getSettings()['handler']); |
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if(isset($values['target_id'])) { |
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$node = $this->entityManager->getStorage($type)->load($values['target_id']); |
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} |
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elseif(isset($value->getValue()['fids'][0])) { |
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$node = $this->entityManager->getStorage($type)->load($value->getValue()['fids'][0]); |
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} |
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if($node !== null) { |
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return $this->entityWrapper->wrap($node); |
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} |
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else { |
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return null; |
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} |
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} |
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/** |
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* Returns whether the FieldItemInterface can be converted or not. |
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* |
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* @param FieldItemInterface $value |
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* |
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* @return bool |
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*/ |
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public function canConvert(FieldItemInterface $value) : bool |
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{ |
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return $value instanceof FileItem; |
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} |
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} |
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Let’s take a look at an example:
In the above example, the authenticate() method works fine as long as you just pass instances of MyUser. However, if you now also want to pass a different implementation of User which does not have a getDisplayName() method, the code will break.
Available Fixes
Change the type-hint for the parameter:
Add an additional type-check:
Add the method to the interface: