[data.indexPatterns] Fix broken rollup index pattern creation (#76593)

Author: lukeelmers

src/plugins/data/common/index_patterns/index_patterns/index_pattern.ts

@@ -481,7 +481,7 @@ export class IndexPattern implements IIndexPattern {
       fields: this.mapping.fields._serialize!(this.fields),
       fieldFormatMap: this.mapping.fieldFormatMap._serialize!(this.fieldFormatMap),
       type: this.type,
-      typeMeta: this.mapping.typeMeta._serialize!(this.mapping),
+      typeMeta: this.mapping.typeMeta._serialize!(this.typeMeta),
     };
   }
 

test/functional/page_objects/settings_page.ts

@@ -282,11 +282,15 @@ export function SettingsPageProvider({ getService, getPageObjects }: FtrProvider
       await PageObjects.header.waitUntilLoadingHasFinished();
     }
 
-    async clickIndexPatternLogstash() {
-      const indexLink = await find.byXPath(`//a[descendant::*[text()='logstash-*']]`);
+    async clickIndexPatternByName(name: string) {
+      const indexLink = await find.byXPath(`//a[descendant::*[text()='${name}']]`);
       await indexLink.click();
     }
 
+    async clickIndexPatternLogstash() {
+      await this.clickIndexPatternByName('logstash-*');
+    }
+
     async getIndexPatternList() {
       await testSubjects.existOrFail('indexPatternTable', { timeout: 5000 });
       return await find.allByCssSelector(

x-pack/test/functional/apps/rollup_job/hybrid_index_pattern.js

@@ -11,6 +11,7 @@ import mockRolledUpData, { mockIndices } from './hybrid_index_helper';
 export default function ({ getService, getPageObjects }) {
   const es = getService('legacyEs');
   const esArchiver = getService('esArchiver');
+  const find = getService('find');
   const retry = getService('retry');
   const PageObjects = getPageObjects(['common', 'settings']);
 
@@ -88,6 +89,15 @@ export default function ({ getService, getPageObjects }) {
         (i) => i.includes(rollupIndexPatternName) && i.includes('Rollup')
       );
       expect(filteredIndexPatternNames.length).to.be(1);
+
+      // make sure there are no toasts which might be showing unexpected errors
+      const toastShown = await find.existsByCssSelector('.euiToast');
+      expect(toastShown).to.be(false);
+
+      // ensure all fields are available
+      await PageObjects.settings.clickIndexPatternByName(rollupIndexPatternName);
+      const fields = await PageObjects.settings.getFieldNames();
+      expect(fields).to.eql(['_source', '_id', '_type', '_index', '_score', '@timestamp']);
     });
 
     after(async () => {