[8.x] [Search] [Playground] Bug get text field for semantic field (#197345) (#197814)

# Backport

This will backport the following commits from `main` to `8.x`:
- [[Search] [Playground] Bug get text field for semantic field
(#197345)](#197345)

<!--- Backport version: 9.4.3 -->

### Questions ?
Please refer to the [Backport tool
documentation](https://github.com/sqren/backport)

<!--BACKPORT [{"author":{"name":"Yan
Savitski","email":"[email protected]"},"sourceCommit":{"committedDate":"2024-10-25T11:54:16Z","message":"[Search]
[Playground] Bug get text field for semantic field (#197345)\n\n- Fix
[Object object] in retrieval documents when semantic text is
used\r\n<img width=\"825\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/39b154ac-727b-40c2-8262-4ff6f892a634\">","sha":"a224f9e14bcfc94db669c7e73dc97fc923326e36","branchLabelMapping":{"^v9.0.0$":"main","^v8.17.0$":"8.x","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","v9.0.0","Team:Search","backport:prev-minor","v8.16.0"],"title":"[Search]
[Playground] Bug get text field for semantic
field","number":197345,"url":"https://github.com/elastic/kibana/pull/197345","mergeCommit":{"message":"[Search]
[Playground] Bug get text field for semantic field (#197345)\n\n- Fix
[Object object] in retrieval documents when semantic text is
used\r\n<img width=\"825\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/39b154ac-727b-40c2-8262-4ff6f892a634\">","sha":"a224f9e14bcfc94db669c7e73dc97fc923326e36"}},"sourceBranch":"main","suggestedTargetBranches":["8.16"],"targetPullRequestStates":[{"branch":"main","label":"v9.0.0","branchLabelMappingKey":"^v9.0.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/197345","number":197345,"mergeCommit":{"message":"[Search]
[Playground] Bug get text field for semantic field (#197345)\n\n- Fix
[Object object] in retrieval documents when semantic text is
used\r\n<img width=\"825\"
alt=\"image\"\r\nsrc=\"https://github.com/user-attachments/assets/39b154ac-727b-40c2-8262-4ff6f892a634\">","sha":"a224f9e14bcfc94db669c7e73dc97fc923326e36"}},{"branch":"8.16","label":"v8.16.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"}]}]
BACKPORT-->

Co-authored-by: Yan Savitski <[email protected]>

Author: kibanamachine

x-pack/plugins/search_playground/server/utils/get_value_for_selected_field.test.ts

@@ -123,4 +123,17 @@ describe('getValueForSelectedField', () => {
       seeking consolation and, eventually, redemption through basic compassion"
     `);
   });
+
+  test('should return when path is semantic field', () => {
+    const hit = {
+      _index: 'sample-index',
+      _id: '8jSNY48B6iHEi98DL1C-',
+      _score: 0.7789394,
+      _source: {
+        test: { text: 'The Shawshank Redemption' },
+      },
+    };
+
+    expect(getValueForSelectedField(hit, 'test')).toEqual('The Shawshank Redemption');
+  });
 });

x-pack/plugins/search_playground/server/utils/get_value_for_selected_field.ts

@@ -6,7 +6,7 @@
  */
 
 import { SearchHit } from '@elastic/elasticsearch/lib/api/types';
-import { get } from 'lodash';
+import { get, has } from 'lodash';
 
 export const getValueForSelectedField = (hit: SearchHit, path: string): string => {
   if (!hit) {
@@ -21,5 +21,7 @@ export const getValueForSelectedField = (hit: SearchHit, path: string): string =
       .join('\n --- \n');
   }
 
-  return get(hit._source, path, '');
+  return has(hit._source, `${path}.text`)
+    ? get(hit._source, `${path}.text`, '')
+    : get(hit._source, path, '');
 };