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I have various functions/methods that programmatically create entities (nodes). I just noticed that invalid data has been getting stored in the db though these functions (invalid in that it doesn't meet the rules defined for that field).

How do I validate the data before $entity->save()?

I have seen documentation saying that I simply need to do $entity->validate() and then count if there are any errors; but I have marked a few fields as required and then left them empty in my API function and $entity->validate()->count() is always 0.

What am I missing?

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    you need to create field constraints refer drupal.stackexchange.com/questions/294733/… – miststudent2011 Feb 1 at 11:08
  • @miststudent2011, thanks for the reply, but that post sounds a lot like how to add custom constraints. I do not have any custom constraints I want to add; I just want to validate against the existing ones. That being said, I am starting to get the idea that the constraints which fields do by default are only designed for form submission and not as "proper" constraints. Is this possible; and if so, wouldn't this be considered a bug in core? – liquidcms Feb 1 at 15:37
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Looking the api it should be simple:

$violations = $entity->validate();
  if ($violations->count() > 0) {
    // Validation failed.
  }
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  • Yes, should be simple enough. Except that doesn't work. – liquidcms Feb 2 at 20:30
  • Have you tried to debug inside the validation function when you call it, to see where the logic doesn't work? – Giuseppe Feb 3 at 8:16

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