hook_node_insert(NodeInterface $node) gets a NodeInterface parameter. I need to pass it to mymodule_node_operations(EntityInterface $entity) which accepts an EntityInterface parameter.

How do I load this node as EntityInterface type? Basically I need to downcast to the parent class which is Entity.

This is the error I get when attempting to pass $node to the function as NodeInterface.

TypeError: Argument 1 passed to mymodule_node_operations() must be an instance of EntityInterface, instance of Drupal\node\Entity\Node given

2 Answers 2


The problem was that I did not include the required class. I added the following to get it to work:

use Drupal\Core\Entity\EntityInterface;

Node has EntityBase in its hierarchy. EntityBase implements EntityInterface. This means you can pass a Node to a function that expects EntityInterface, since Node extends a class that implements that interface. This is how OOP works, and why classes are type hinted with interfaces (eg. EntityInterface) rather than a specific class (eg. EntityBase).

  • 3
    Perhaps you don't have use Drupal\Core\Entity\EntityInterface; in your code?
    – anonymous
    Commented Jun 16, 2020 at 5:23
  • @anonymous You are absolutely right!!! Thank you :)
    – hga77
    Commented Jun 16, 2020 at 5:42

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