Find documents with empty string value on elasticsearch

Question

I\'ve been trying to filter with elasticsearch only those documents that contains an empty string in its body. So far I\'m having no luck.

Before I go on, I should

Answer 1

OR using lucene query string syntax

q=yourfield.keyword:""

See Elastic Search Reference https://www.elastic.co/guide/en/elasticsearch/reference/6.5/query-dsl-query-string-query.html#query-string-syntax