Elasticsearch - select document based on value in another document

Question

I have a parent document (ex: "Parent") which has two types of child documents: "Child 1" and "Child 2". I want to select child 2 documents which satisfy condition based on a value of field in child 1. Is it possible in ElasticSearch? If not, how can I approach this?

I am using ElasticSearch 5.5

Answer 1

You can use siren join plugin which filters documents of one source based on another source based on a common field.

Here is the link to it https://github.com/sirensolutions/siren-join

As mentioned in this link that this has been moved in vanguard for your version