Empty searches return no results using a Text Match Over Multiple Fields blueprint element

Issue

When a Blueprint is configured with the Text Match Over Multiple Fields element, performing an empty search yields no results.

Environment

• Liferay DXP 7.4 U5+
• Liferay DXP Quarterly Releases

Resolution

• Text Match Over Multiple Fields element does not support empty searches, as it requires at least one keyword.
• To achieve the desired behavior, you should create a custom copy of this element and add a condition to its JSON definition:

1. Navigate to Global menu > Applications > Blueprints.
2. Click on the Elements tab.
3. Find the Text Match Over Multiple Fields element and make a copy (Actions button > Copy).
4. Edit the copied element and give it a descriptive name (e.g., Custom Text Match Over Multiple Fields).
5. In the elementDefinition section, edit the JSON.

6. Locate queryEntries and add the following condition block:

   "condition": {
       "not": {
           "equals": {
               "parameterName": "keywords",
               "value": ""
           }
       }
   }

   The final queryEntries block should look similar to this:

   "queryEntries": [
       {
           "clauses": [
               {
                   "context": "query",
                   "occur": "must",
                   "query": {
                       "multi_match": {
                           "fuzziness": "${configuration.fuzziness}",
                           "query": "${keywords}",
                           "minimum_should_match": "${configuration.minimum_should_match}",
                           "boost": "${configuration.boost}",
                           "fields": "${configuration.fields}",
                           "type": "${configuration.type}",
                           "operator": "${configuration.operator}",
                           "slop": "${configuration.slop}"
                       }
                   }
               }
           ],
           "condition": {
               "not": {
                   "equals": {
                       "parameterName": "keywords",
                       "value": ""
                   }
               }
           }
       }
   ]

7. Save.
8. Edit your Blueprint and add the Custom Text Match Over Multiple Fields element. Configure it with the same settings as the original.
9. Remove/disable the original Text Match Over Multiple Fields element.
10. Save the Blueprint.