Executing range facets

The previous recipe describes a facet type that can be very useful if facets are returned on terms or on a limited number of items. Otherwise, it's often required to return the facets aggregated in ranges: the range facets answers this requirement. Common scenarios are:

• Price range (used in shops)

• Size range

• Alphabetical range

Getting ready

You need a working ElasticSearch cluster and an index populated with the script available in the online code.

How to do it...

For executing range facets, we will perform the steps given as follows:

1. We want to provide three types of facet ranges:

   • Price facet, that aggregates the price of items in ranges

   • Age facet, that aggregates the age contained in document in four ranges of 25 years

   • Date facet, the ranges of 6 months of the previous year and all this year

2. To obtain this result, we need to execute a similar query:

   curl -XGET 'http://127.0.0.1:9200/test-index/test-type/_search?pretty=true&size=0' -d '{
       "query": {
           "match_all"...