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I want to render a node with certain properties set. For example, I want to load every node which ONLY has field_a and the other fields are empty.

If I use

$this->nodeStorage->loadByProperties(['type' => 'node_type', 'field_a' => $value]);

-> this will load every node which has field_a, but the other fields are not necessarily empty. I tried setting all the other fields to null, but it throws an InvalidQueryException. How can I change that query to IS NULL or which function can I use?

4

loadByProperties() executes an entity query with ->condition() for each property. You can't use this for empty fields, you need

$query->notExists('field_example');

according to How get empty record on date field with entityQuery?

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