Reverse entity reference lookup I have a data structure where content type research has an entity reference field scientists.
The content type scientists does not have any research reference entity field though.
I can get all scientists that a particular research has through research.
But is there a way to get all researches one particular scientist has? When content types were created I wasn't involved, so I'm trying to see my options whether I can somehow click a checkbox to make this applicable.
When I tried to set up a field with type of entity reference and pointed it to research for scientists, they were empty.
Any help is highly appreciated.
Is there a way to get all researches one particular scientist has?

Yes, search for the scientist target id:
$nodes = \Drupal::entityTypeManager()-&gt;getStorage('node')-&gt;loadByProperties([
  'type' =&gt; 'research',
  'field_scientists' =&gt; $scientist_id,
]);