ElasticSearch search has_many relation

ruby-on-rails activerecord elasticsearch

If we're talking about the https://github.com/elasticsearch/elasticsearch-rails/blob/master/elasticsearch-model gem, the scope doesn't really matter here.

You have to use a filtered query, and put use a filter on something on like article_id.

(There's a comprehensive example for associations here: https://github.com/elasticsearch/elasticsearch-rails/blob/master/elasticsearch-model/examples/activerecord_associations.rb)