Using the has_parent query

In the previous recipes, we saw the has_child query; Elasticsearch provides a query to search child documents based on the parent query, has_parent.

Getting ready

You need an up-and-running Elasticsearch installation as we described in the Downloading and installing Elasticsearch recipe in Chapter 2, Downloading and Setup.

To execute curl via the command line, you need to install curl for your operating system.

To correctly execute the following commands, you need an index populated with the chapter_07/populate_relations.sh script available in the online code.

How to do it...

To execute the has_parent query, we will perform the following steps:

1. We want to search children test-type2 of parents test-type that has a term joe in the parsedtext field. We can create this kind of query:

           curl -XPOST 'http://127.0.0.1:9200/test-index/test-
           type2/_search?pretty' -d '{
           "query": {
                   "has_parent" : {
                       "type...