How to use Custom Fields (expando, searchable as keyword) in Custom Facet example (nested, .raw)

• Type: Improvement
• Status: SME Review
• Priority: Minor
• Resolution: Unresolved
• Fix Version/s: 7.1.x, 7.2.x, 7.3.x
• Component/s: Search Infrastructure
• Labels: None
• Epic Link: Search and Enterprise Search in 7.3
• Type of Documentation: User
• Git Pull Request: https://github.com/lipusz/liferay-learn/pull/26

Tasks:

1. Add example to the Custom Facet article to show how to use Custom Fields (steps below)
2. Promote Field Mappings UI for finding fields
3. Talk about using Elasticsearch's Raw fields

To show how to use Custom Fields:

1. Create a Custom Field for Web Content of type true/false, searchable as keyword called enabled
2. Field name in index:

   expando__keyword__custom_fields__enabled
   

1. Field mapping in Elasticsearch:

   GET /liferay-20098/_mapping/field/expando__keyword__custom_fields__enabled
   
   {
     "liferay-20098": {
       "mappings": {
         "expando__keyword__custom_fields__enabled": {
           "full_name": "expando__keyword__custom_fields__enabled",
           "mapping": {
             "expando__keyword__custom_fields__enabled": {
               "type": "text",
               "store": true,
               "fields": {
                 "raw": {
                   "type": "keyword"
                 }
               },
               "analyzer": "keyword_lowercase"
             }
           }
         }
       }
     }
   }
   

As you can see, Custom Fields are indexed in a nested form:

• expando__keyword__custom_fields__enabled

  : as text

• expando__keyword__custom_fields__enabled.raw

  : as keyword => Use this in the Custom Facet widget configuration