Empty ddm keyword fields are indexed

• Type: Bug
• Status: Closed
• Resolution: Fixed
• Affects Version/s: 7.0.X, 7.1.X, 7.2.X, 7.3.X, Master
• Fix Version/s: 7.0.0 DXP FP99, 7.0.10.16 DXP SP16, 7.0.X, 7.1.10 DXP FP23, 7.1.10.6 SP6, 7.1.X, 7.2.10 DXP FP13, 7.2.X, 7.3.7 CE GA8, 7.3.10 DXP FP2, 7.3.X, 7.4.0 CE GA1, 7.4.1 CE GA2, 7.4.13 DXP GA1, Master
• Component/s: Search Infrastructure
• Labels:
  • ee-ts
  • liferay-dxp-70-sp16
  • liferay-dxp-71-sp6
  • liferay-fixpack-de-99-7010
  • liferay-fixpack-dxp-13-7210
  • liferay-fixpack-dxp-2-7310
  • liferay-fixpack-dxp-23-7110
• Branch Version/s:
  7.3.x, 7.2.x, 7.1.x, 7.0.x
• Backported to Branch:
  Committed
• Fix Priority: 3
• Git Pull Request: https://github.com/liferay-search/liferay-portal/pull/113
• QA Test Name:
  • functional
• Quality Gate: Customer

Issue
Empty option is displayed in Custom Facet

Steps to reproduce

1. Add a new structure with just a Text field (not Text Box)
2. Create a new web content with that structure
   Title: wc1
   TextBox:
3. Create a new web content with that structure
   Title: wc2
   TextBox: (empty)
4. Click on the options menu in "Search Results" and select "Configuration"
5. Enable "Display Results in Document Form" and Save
6. Search for "test" (should return wc1 and wc2)
7. Expand the details for the created web content wc1
8. Get the field name for the text box (use of kibana may be necessary)
   i.e.: ddm_keyword37341_Text45y3_en_US_String_sortable
9. Add "Custom Facet" widget to page
10. Click on the options menu in "Custom Facet" and select "Configuration"
11. Set the "Aggregation Field" to the field name retrieved before and Save

Actual results
Empty option is displayed in Custom Facet (a keyword field with "" was indexed)

Expected results
Empty option is not displayed in Custom Facet (a keyword field wasn't indexed)