Where to add a missing filter in this Kibana search

Elastic Stack Kibana
3

Thanks Tanya! We've tried to do as you said, but the result is the same...

We want to get all the documents in one index with "coordenadasDestino" != NULL ... in all our documents this field exists but sometime its NULL or doens't have values

If we do:

{"constant_score":{"filter":{"exists":{"field":"coordenadasDestino"}}}}*

We get all the documents including also the ones who hasn't values for field coordenadasDestino (NULL)

How can we do this?

Thanks in advance! Regards.