[9.2] [Cases] Add total events to mappings (#236539) (#239867)

# Backport

This will backport the following commits from `main` to `9.2`:
- [[Cases] Add total events to mappings
(#236539)](#236539)

<!--- Backport version: 9.6.6 -->

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

<!--BACKPORT
[{"author":{"name":"lgestc","email":"[email protected]"},"sourceCommit":{"committedDate":"2025-10-07T08:46:38Z","message":"[Cases]
Add total events to mappings (#236539)\n\n## Summary\n\nThis PR adds
total_events mapping to cases SO to enable filtering and\nsorting in the
future.","sha":"1937eed65f14cb1974cd5ee69250844982e41f43","branchLabelMapping":{"^v9.3.0$":"main","^v(\\d+).(\\d+).\\d+$":"$1.$2"}},"sourcePullRequest":{"labels":["release_note:skip","backport:version","v9.2.0","v9.3.0"],"title":"[Cases]
Add total events to
mappings","number":236539,"url":"https://github.com/elastic/kibana/pull/236539","mergeCommit":{"message":"[Cases]
Add total events to mappings (#236539)\n\n## Summary\n\nThis PR adds
total_events mapping to cases SO to enable filtering and\nsorting in the
future.","sha":"1937eed65f14cb1974cd5ee69250844982e41f43"}},"sourceBranch":"main","suggestedTargetBranches":["9.2"],"targetPullRequestStates":[{"branch":"9.2","label":"v9.2.0","branchLabelMappingKey":"^v(\\d+).(\\d+).\\d+$","isSourceBranch":false,"state":"NOT_CREATED"},{"branch":"main","label":"v9.3.0","branchLabelMappingKey":"^v9.3.0$","isSourceBranch":true,"state":"MERGED","url":"https://github.com/elastic/kibana/pull/236539","number":236539,"mergeCommit":{"message":"[Cases]
Add total events to mappings (#236539)\n\n## Summary\n\nThis PR adds
total_events mapping to cases SO to enable filtering and\nsorting in the
future.","sha":"1937eed65f14cb1974cd5ee69250844982e41f43"}}]}]
BACKPORT-->

Co-authored-by: lgestc <[email protected]>

Author: kibanamachine

packages/kbn-check-saved-objects-cli/current_fields.json

@@ -193,6 +193,7 @@
     "title",
     "total_alerts",
     "total_comments",
+    "total_events",
     "updated_at",
     "updated_by",
     "updated_by.email",

packages/kbn-check-saved-objects-cli/current_mappings.json

@@ -678,6 +678,9 @@
       "total_comments": {
         "type": "integer"
       },
+      "total_events": {
+        "type": "integer"
+      },
       "updated_at": {
         "type": "date"
       },

src/core/server/integration_tests/ci_checks/saved_objects/check_registered_types.test.ts

@@ -79,7 +79,7 @@ describe('checking migration metadata changes on all registered SO types', () =>
         "canvas-element": "288fd8d216eb49cbeb5e8f7491f207ef074b80dd",
         "canvas-workpad": "5cd605383a100a27941cca6cbf2d954aa96a16e2",
         "canvas-workpad-template": "f9a6ffab76ddfcd8fa3823002aa576c8f1d0e686",
-        "cases": "cd5fa06dcdbe902d3647666a10e16b233810d0e4",
+        "cases": "c34745b9dd413fd9b76a23e0ceacd70269a4573b",
         "cases-comments": "235311d14fbba84faf8ce1f32c31ddb3a435bacb",
         "cases-configure": "66d4c64d83b464f5166005b8ffa03b721fcaaf8b",
         "cases-connector-mappings": "877bb4d52e9821e330622bd75fba799490ec6952",
@@ -406,13 +406,14 @@ describe('checking migration metadata changes on all registered SO types', () =>
         "canvas-workpad-template|warning: The SO type owner should ensure these transform functions DO NOT mutate after they are defined.",
         "================================================================================================================================",
         "cases|global: 58923536ede82aed6c22799b52c4f51f4bf66aba",
-        "cases|mappings: 8531977e6b164e1d0072a24c84e390beedb5756f",
+        "cases|mappings: 81a027f6cdf8ba835338e5cdf9db0bc6b137f2d0",
         "cases|schemas: da39a3ee5e6b4b0d3255bfef95601890afd80709",
-        "cases|10.5.0: 566d7b907e87be36f8cac8152d2f721bf91bcead",
-        "cases|10.4.0: 3b1d7eee41677f6b5e78b5d3b6108e6c12ae0222",
-        "cases|10.3.0: e75b333589e368f47fb160e6dd01200590e3c313",
-        "cases|10.2.0: bf34bde323a6d193f85d11a9ca87d52263beace6",
-        "cases|10.1.0: 2084c62dbe41da4fa3560ff80fe37af3bc0cc15c",
+        "cases|10.6.0: 5837259ab25e4059141fce980a861f0ba977d8a2",
+        "cases|10.5.0: 3c7812d675d4223c11969bb1b49a4cc626c1bd1f",
+        "cases|10.4.0: b228632dfb5a8cae50f82c4b0fe78305fa6d1fdd",
+        "cases|10.3.0: 6bf633e6147007b80adfe8da94b3e57d6004a803",
+        "cases|10.2.0: 9b3de0b9947e9d6bfb5d63ea9d5e9df9afca2601",
+        "cases|10.1.0: 932fb3a37b3346e4c6bb6ad78dc3c0fd323b858f",
         "cases|8.7.0: 54c152a2584673672445346cf69d72bda587cc52",
         "cases|8.5.0: a2c0c0dcdbac64d71ddb583dc02e83aa760eb784",
         "cases|8.3.0: 09aaac909eff1a6a2d944aa6c1dd297dda05b5ce",
@@ -1262,7 +1263,7 @@ describe('checking migration metadata changes on all registered SO types', () =>
         "canvas-element": "10.0.0",
         "canvas-workpad": "10.0.0",
         "canvas-workpad-template": "10.0.0",
-        "cases": "10.5.0",
+        "cases": "10.6.0",
         "cases-comments": "10.1.0",
         "cases-configure": "10.0.0",
         "cases-connector-mappings": "10.0.0",
@@ -1409,7 +1410,7 @@ describe('checking migration metadata changes on all registered SO types', () =>
         "canvas-element": "8.9.0",
         "canvas-workpad": "8.9.0",
         "canvas-workpad-template": "8.9.0",
-        "cases": "10.5.0",
+        "cases": "10.6.0",
         "cases-comments": "10.1.0",
         "cases-configure": "7.15.0",
         "cases-connector-mappings": "7.14.0",

x-pack/platform/plugins/shared/cases/common/types/domain/case/v1.ts

@@ -151,7 +151,7 @@ export const CaseRt = rt.intersection([
     id: rt.string,
     totalComment: rt.number,
     totalAlerts: rt.number,
-    totalEvents: rt.number,
+    totalEvents: rt.union([rt.number, rt.undefined]),
     version: rt.string,
   }),
   rt.exact(

x-pack/platform/plugins/shared/cases/server/common/types/case.ts

@@ -46,6 +46,7 @@ export interface CasePersistedAttributes {
   title: string;
   total_alerts: number;
   total_comments: number;
+  total_events?: number;
   updated_at: string | null;
   updated_by: User | null;
   category?: string | null;

x-pack/platform/plugins/shared/cases/server/saved_object_types/cases/cases.ts

@@ -23,6 +23,7 @@ import {
   modelVersion3,
   modelVersion4,
   modelVersion5,
+  modelVersion6,
 } from './model_versions';
 import { handleImport } from '../import_export/import';
 
@@ -199,6 +200,9 @@ export const createCaseSavedObjectType = (
       total_comments: {
         type: 'integer',
       },
+      total_events: {
+        type: 'integer',
+      },
       category: {
         type: 'keyword',
       },
@@ -268,6 +272,7 @@ export const createCaseSavedObjectType = (
     3: modelVersion3,
     4: modelVersion4,
     5: modelVersion5,
+    6: modelVersion6,
   },
   management: {
     importableAndExportable: true,

x-pack/platform/plugins/shared/cases/server/saved_object_types/cases/model_versions/index.ts

@@ -10,3 +10,4 @@ export { modelVersion2 } from './model_version_2';
 export { modelVersion3 } from './model_version_3';
 export { modelVersion4 } from './model_version_4';
 export { modelVersion5 } from './model_version_5';
+export { modelVersion6 } from './model_version_6';

x-pack/platform/plugins/shared/cases/server/saved_object_types/cases/model_versions/model_version_6.ts

@@ -0,0 +1,34 @@
+/*
+ * Copyright Elasticsearch B.V. and/or licensed to Elasticsearch B.V. under one
+ * or more contributor license agreements. Licensed under the Elastic License
+ * 2.0; you may not use this file except in compliance with the Elastic License
+ * 2.0.
+ */
+
+import type { SavedObjectsModelVersion } from '@kbn/core-saved-objects-server';
+import { casesSchemaV6 } from '../schemas';
+
+/**
+ * Adds the total_events field to the cases SO.
+ */
+export const modelVersion6: SavedObjectsModelVersion = {
+  changes: [
+    {
+      type: 'mappings_addition',
+      addedMappings: {
+        total_events: {
+          type: 'integer',
+        },
+      },
+    },
+    {
+      type: 'data_backfill',
+      backfillFn: (_doc) => {
+        return { attributes: { total_events: 0 } };
+      },
+    },
+  ],
+  schemas: {
+    forwardCompatibility: casesSchemaV6.extends({}, { unknowns: 'ignore' }),
+  },
+};

x-pack/platform/plugins/shared/cases/server/saved_object_types/cases/model_versions/model_versions.test.ts

@@ -5,7 +5,14 @@
  * 2.0.
  */
 
-import { modelVersion1, modelVersion2, modelVersion3, modelVersion4, modelVersion5 } from '.';
+import {
+  modelVersion1,
+  modelVersion2,
+  modelVersion3,
+  modelVersion4,
+  modelVersion5,
+  modelVersion6,
+} from '.';
 
 describe('Model versions', () => {
   describe('version 1', () => {
@@ -156,4 +163,25 @@ describe('Model versions', () => {
       `);
     });
   });
+
+  describe('version 6', () => {
+    it('returns version 6 changes correctly', () => {
+      expect(modelVersion6.changes).toMatchInlineSnapshot(`
+        Array [
+          Object {
+            "addedMappings": Object {
+              "total_events": Object {
+                "type": "integer",
+              },
+            },
+            "type": "mappings_addition",
+          },
+          Object {
+            "backfillFn": [Function],
+            "type": "data_backfill",
+          },
+        ]
+      `);
+    });
+  });
 });

x-pack/platform/plugins/shared/cases/server/saved_object_types/cases/schemas/index.ts

@@ -12,3 +12,4 @@ export { casesSchema as casesSchemaV2 } from './v2';
 export { casesSchema as casesSchemaV3 } from './v3';
 export { casesSchema as casesSchemaV4 } from './v4';
 export { casesSchema as casesSchemaV5 } from './v5';
+export { casesSchema as casesSchemaV6 } from './v6';