Alerting: Optimize rules fetching on the folder's rules tab (#104777)

* Mark labels and annotations as optional in Grafana ruler DTO

* Refactor AlertsFolderView to use folder-specific endpoint for rules loading

* Improve tests for BrowserFolderAlertingPage

* Update translations

* Revert go changes

* update gen files

---------

Co-authored-by: Gilles De Mey <gilles.de.mey@gmail.com>

public/app/features/alerting/unified/AlertsFolderView.test.tsx

@@ -1,13 +1,9 @@
 import { render } from 'test/test-utils';
 import { byTestId } from 'testing-library-selector';
 
-import { FolderState } from 'app/types';
-import { CombinedRuleNamespace } from 'app/types/unified-alerting';
-
 import { AlertsFolderView } from './AlertsFolderView';
-import { useCombinedRuleNamespaces } from './hooks/useCombinedRuleNamespaces';
-import { mockCombinedRule } from './mocks';
-import { GRAFANA_RULES_SOURCE_NAME } from './utils/datasource';
+import { mockFolder } from './mocks';
+import { alertingFactory } from './mocks/server/db';
 
 const ui = {
   filter: {
@@ -19,122 +15,39 @@ const ui = {
   },
 };
 
-const combinedNamespaceMock = jest.fn(useCombinedRuleNamespaces);
-jest.mock('./hooks/useCombinedRuleNamespaces', () => ({
-  useCombinedRuleNamespaces: () => combinedNamespaceMock(),
-}));
-
-const mockFolder = (folderOverride: Partial<FolderState> = {}): FolderState => {
-  return {
-    id: 1,
-    title: 'Folder with alerts',
-    uid: 'folder-1',
-    hasChanged: false,
-    canSave: false,
-    url: '/folder-1',
-    version: 1,
-    canDelete: false,
-    ...folderOverride,
-  };
-};
+const alertingRuleBuilder = alertingFactory.ruler.grafana.alertingRule;
 
 describe('AlertsFolderView tests', () => {
   it('Should display grafana alert rules when the folder uid matches the name space uid', () => {
     // Arrange
     const folder = mockFolder();
-
-    const grafanaNamespace: CombinedRuleNamespace = {
-      name: folder.title,
-      rulesSource: GRAFANA_RULES_SOURCE_NAME,
-      uid: 'folder-1',
-      groups: [
-        {
-          name: 'group1',
-          rules: [
-            mockCombinedRule({ name: 'Test Alert 1' }),
-            mockCombinedRule({ name: 'Test Alert 2' }),
-            mockCombinedRule({ name: 'Test Alert 3' }),
-          ],
-          totals: {},
-        },
-        {
-          name: 'group2',
-          rules: [
-            mockCombinedRule({ name: 'Test Alert 4' }),
-            mockCombinedRule({ name: 'Test Alert 5' }),
-            mockCombinedRule({ name: 'Test Alert 6' }),
-          ],
-          totals: {},
-        },
-      ],
-    };
-
-    combinedNamespaceMock.mockReturnValue([grafanaNamespace]);
+    const folderRules = alertingRuleBuilder.buildList(6);
 
     // Act
-    render(<AlertsFolderView folder={folder} />);
+    render(<AlertsFolderView folder={folder} rules={folderRules} />);
 
     // Assert
     const alertRows = ui.ruleList.row.queryAll();
     expect(alertRows).toHaveLength(6);
-    expect(alertRows[0]).toHaveTextContent('Test Alert 1');
-    expect(alertRows[1]).toHaveTextContent('Test Alert 2');
-    expect(alertRows[2]).toHaveTextContent('Test Alert 3');
-    expect(alertRows[3]).toHaveTextContent('Test Alert 4');
-    expect(alertRows[4]).toHaveTextContent('Test Alert 5');
-    expect(alertRows[5]).toHaveTextContent('Test Alert 6');
-  });
-
-  it('Should not display alert rules when the namespace uid does not match the folder uid', () => {
-    // Arrange
-    const folder = mockFolder();
-
-    const grafanaNamespace: CombinedRuleNamespace = {
-      name: 'Folder without alerts',
-      rulesSource: GRAFANA_RULES_SOURCE_NAME,
-      uid: 'folder-2',
-      groups: [
-        {
-          name: 'default',
-          rules: [
-            mockCombinedRule({ name: 'Test Alert from other folder 1' }),
-            mockCombinedRule({ name: 'Test Alert from other folder 2' }),
-          ],
-          totals: {},
-        },
-      ],
-    };
-
-    combinedNamespaceMock.mockReturnValue([grafanaNamespace]);
-
-    // Act
-    render(<AlertsFolderView folder={folder} />);
-
-    // Assert
-    expect(ui.ruleList.row.queryAll()).toHaveLength(0);
+    expect(alertRows[0]).toHaveTextContent('Alerting rule 1');
+    expect(alertRows[1]).toHaveTextContent('Alerting rule 2');
+    expect(alertRows[2]).toHaveTextContent('Alerting rule 3');
+    expect(alertRows[3]).toHaveTextContent('Alerting rule 4');
+    expect(alertRows[4]).toHaveTextContent('Alerting rule 5');
+    expect(alertRows[5]).toHaveTextContent('Alerting rule 6');
   });
 
   it('Should filter alert rules by the name, case insensitive', async () => {
     // Arrange
     const folder = mockFolder();
 
-    const grafanaNamespace: CombinedRuleNamespace = {
-      name: folder.title,
-      rulesSource: GRAFANA_RULES_SOURCE_NAME,
-      uid: 'folder-1',
-      groups: [
-        {
-          name: 'default',
-          rules: [mockCombinedRule({ name: 'CPU Alert' }), mockCombinedRule({ name: 'RAM usage alert' })],
-          totals: {},
-        },
-      ],
-    };
-
-    combinedNamespaceMock.mockReturnValue([grafanaNamespace]);
+    const folderRules = [
+      alertingRuleBuilder.build({ grafana_alert: { title: 'CPU Alert' } }),
+      alertingRuleBuilder.build({ grafana_alert: { title: 'RAM usage alert' } }),
+    ];
 
     // Act
-    const { user } = render(<AlertsFolderView folder={folder} />);
+    const { user } = render(<AlertsFolderView folder={folder} rules={folderRules} />);
 
     await user.type(ui.filter.name.get(), 'cpu');
 
@@ -147,26 +60,13 @@ describe('AlertsFolderView tests', () => {
     // Arrange
     const folder = mockFolder();
 
-    const grafanaNamespace: CombinedRuleNamespace = {
-      name: folder.title,
-      rulesSource: GRAFANA_RULES_SOURCE_NAME,
-      uid: 'folder-1',
-      groups: [
-        {
-          name: 'default',
-          rules: [
-            mockCombinedRule({ name: 'CPU Alert', labels: {} }),
-            mockCombinedRule({ name: 'RAM usage alert', labels: { severity: 'critical' } }),
-          ],
-          totals: {},
-        },
-      ],
-    };
-
-    combinedNamespaceMock.mockReturnValue([grafanaNamespace]);
+    const folderRules = [
+      alertingRuleBuilder.build({ grafana_alert: { title: 'CPU Alert' }, labels: {} }),
+      alertingRuleBuilder.build({ grafana_alert: { title: 'RAM usage alert' }, labels: { severity: 'critical' } }),
+    ];
 
     // Act
-    const { user } = render(<AlertsFolderView folder={folder} />);
+    const { user } = render(<AlertsFolderView folder={folder} rules={folderRules} />);
 
     await user.type(ui.filter.label.get(), 'severity=critical');
 

public/app/features/alerting/unified/AlertsFolderView.tsx

@@ -1,6 +1,6 @@
 import { css } from '@emotion/css';
 import { orderBy } from 'lodash';
-import { useEffect, useState } from 'react';
+import { useState } from 'react';
 import { useDebounce } from 'react-use';
 
 import { GrafanaTheme2, SelectableValue } from '@grafana/data';
@@ -8,20 +8,19 @@ import { Card, FilterInput, Icon, Pagination, Select, Stack, TagList, useStyles2
 import { DEFAULT_PER_PAGE_PAGINATION } from 'app/core/constants';
 import { Trans, t } from 'app/core/internationalization';
 import { getQueryParamValue } from 'app/core/utils/query';
-import { FolderState, useDispatch } from 'app/types';
-import { CombinedRule } from 'app/types/unified-alerting';
+import { FolderDTO } from 'app/types';
+import { GrafanaRuleDefinition, RulerGrafanaRuleDTO } from 'app/types/unified-alerting-dto';
 
-import { useCombinedRuleNamespaces } from './hooks/useCombinedRuleNamespaces';
 import { usePagination } from './hooks/usePagination';
 import { useURLSearchParams } from './hooks/useURLSearchParams';
-import { fetchPromRulesAction, fetchRulerRulesAction } from './state/actions';
 import { combineMatcherStrings, labelsMatchMatchers } from './utils/alertmanager';
 import { GRAFANA_RULES_SOURCE_NAME } from './utils/datasource';
 import { parsePromQLStyleMatcherLooseSafe } from './utils/matchers';
-import { createViewLink } from './utils/misc';
+import { rulesNav } from './utils/navigation';
 
 interface Props {
-  folder: FolderState;
+  folder: FolderDTO;
+  rules: RulerGrafanaRuleDTO[];
 }
 
 enum SortOrder {
@@ -34,31 +33,20 @@ const sortOptions: Array<SelectableValue<SortOrder>> = [
   { label: 'Alphabetically [Z-A]', value: SortOrder.Descending },
 ];
 
-export const AlertsFolderView = ({ folder }: Props) => {
+export const AlertsFolderView = ({ folder, rules }: Props) => {
   const styles = useStyles2(getStyles);
-  const dispatch = useDispatch();
 
   const onTagClick = (tagName: string) => {
     const matchersString = combineMatcherStrings(labelFilter, tagName);
     setLabelFilter(matchersString);
   };
 
-  useEffect(() => {
-    dispatch(fetchPromRulesAction({ rulesSourceName: GRAFANA_RULES_SOURCE_NAME }));
-    dispatch(fetchRulerRulesAction({ rulesSourceName: GRAFANA_RULES_SOURCE_NAME }));
-  }, [dispatch]);
-
-  const combinedNamespaces = useCombinedRuleNamespaces(GRAFANA_RULES_SOURCE_NAME);
   const { nameFilter, labelFilter, sortOrder, setNameFilter, setLabelFilter, setSortOrder } =
     useAlertsFolderViewParams();
 
-  const matchingNamespace = combinedNamespaces.find((namespace) => namespace.uid === folder.uid);
+  const filteredRules = filterAndSortRules(rules, nameFilter, labelFilter, sortOrder ?? SortOrder.Ascending);
+  const hasNoResults = filteredRules.length === 0;
 
-  const alertRules = matchingNamespace?.groups.flatMap((group) => group.rules) ?? [];
-
-  const filteredRules = filterAndSortRules(alertRules, nameFilter, labelFilter, sortOrder ?? SortOrder.Ascending);
-
-  const hasNoResults = alertRules.length === 0 || filteredRules.length === 0;
   const { page, numberOfPages, onPageChange, pageItems } = usePagination(filteredRules, 1, DEFAULT_PER_PAGE_PAGINATION);
 
   return (
@@ -96,18 +84,18 @@ export const AlertsFolderView = ({ folder }: Props) => {
         </Stack>
 
         <Stack direction="column" gap={1}>
-          {pageItems.map((currentRule) => (
+          {pageItems.map(({ grafana_alert, labels = {} }) => (
             <Card
-              key={Boolean(currentRule.uid) ? currentRule.uid : currentRule.name}
-              href={createViewLink('grafana', currentRule, '')}
+              key={grafana_alert.uid}
+              href={createGrafanaRuleViewLink(grafana_alert)}
               className={styles.card}
               data-testid="alert-card-row"
             >
-              <Card.Heading>{currentRule.name}</Card.Heading>
+              <Card.Heading>{grafana_alert.title}</Card.Heading>
               <Card.Tags>
                 <TagList
                   onClick={onTagClick}
-                  tags={Object.entries(currentRule.labels).map(([label, value]) => `${label}=${value}`)}
+                  tags={Object.entries(labels).map(([label, value]) => `${label}=${value}`)}
                 />
               </Card.Tags>
               <Card.Meta>
@@ -178,17 +166,32 @@ function useAlertsFolderViewParams() {
 }
 
 function filterAndSortRules(
-  originalRules: CombinedRule[],
+  originalRules: RulerGrafanaRuleDTO[],
   nameFilter: string,
   labelFilter: string,
   sortOrder: SortOrder
 ) {
   const matchers = parsePromQLStyleMatcherLooseSafe(labelFilter);
-  const rules = originalRules.filter(
-    (rule) => rule.name.toLowerCase().includes(nameFilter.toLowerCase()) && labelsMatchMatchers(rule.labels, matchers)
-  );
+  const rules = originalRules.filter((rule) => {
+    const nameMatch = rule.grafana_alert.title.toLowerCase().includes(nameFilter.toLowerCase());
+    const labelMatch = labelsMatchMatchers(rule.labels ?? {}, matchers);
+    return nameMatch && labelMatch;
+  });
 
-  return orderBy(rules, (x) => x.name.toLowerCase(), [sortOrder === SortOrder.Ascending ? 'asc' : 'desc']);
+  return orderBy(rules, (rule) => rule.grafana_alert.title.toLowerCase(), [
+    sortOrder === SortOrder.Ascending ? 'asc' : 'desc',
+  ]);
+}
+
+function createGrafanaRuleViewLink(ruleDefinition: GrafanaRuleDefinition): string {
+  return rulesNav.detailsPageLink(
+    GRAFANA_RULES_SOURCE_NAME,
+    {
+      uid: ruleDefinition.uid,
+      ruleSourceName: GRAFANA_RULES_SOURCE_NAME,
+    },
+    undefined
+  );
 }
 
 export const getStyles = (theme: GrafanaTheme2) => ({

public/app/features/alerting/unified/mocks/server/db.ts

@@ -6,6 +6,8 @@ import { config } from '@grafana/runtime';
 import { GrafanaManagedContactPoint, GrafanaManagedReceiverConfig } from 'app/plugins/datasource/alertmanager/types';
 import { FolderDTO } from 'app/types';
 import {
+  GrafanaAlertStateDecision,
+  GrafanaAlertingRuleDefinition,
   GrafanaRecordingRuleDefinition,
   PromAlertingRuleDTO,
   PromAlertingRuleState,
@@ -14,11 +16,13 @@ import {
   RulerAlertingRuleDTO,
   RulerCloudRuleDTO,
   RulerGrafanaRuleDTO,
+  RulerGrafanaRuleGroupDTO,
   RulerRecordingRuleDTO,
   RulerRuleGroupDTO,
 } from 'app/types/unified-alerting-dto';
 
 import { setupDataSources } from '../../testSetup/datasources';
+import { Annotation } from '../../utils/constants';
 import { DataSourceType } from '../../utils/datasource';
 import { namespaces } from '../mimirRulerApi';
 
@@ -95,6 +99,12 @@ const rulerGroupFactory = Factory.define<RulerRuleGroupDTO<RulerCloudRuleDTO>, {
   }
 );
 
+const rulerGrafanaGroupFactory = Factory.define<RulerGrafanaRuleGroupDTO>(({ sequence }) => ({
+  name: `test-group-${sequence}`,
+  interval: '1m',
+  rules: grafanaAlertingRuleFactory.buildList(3),
+}));
+
 class DataSourceFactory extends Factory<DataSourceInstanceSettings> {
   vanillaPrometheus() {
     return this.params({ uid: PROMETHEUS_DATASOURCE_UID, name: 'Prometheus' });
@@ -179,6 +189,26 @@ const grafanaRecordingRule = Factory.define<RulerGrafanaRuleDTO<GrafanaRecording
   annotations: {}, // @TODO recording rules don't have annotations, we need to fix this type definition
 }));
 
+const grafanaAlertingRuleFactory = Factory.define<RulerGrafanaRuleDTO<GrafanaAlertingRuleDefinition>>(
+  ({ sequence }) => ({
+    grafana_alert: {
+      id: String(sequence),
+      uid: uniqueId(),
+      title: `Alerting rule ${sequence}`,
+      namespace_uid: 'test-namespace',
+      rule_group: 'test-group',
+      condition: 'A',
+      data: [],
+      is_paused: false,
+      no_data_state: GrafanaAlertStateDecision.NoData,
+      exec_err_state: GrafanaAlertStateDecision.Error,
+    } satisfies GrafanaAlertingRuleDefinition,
+    for: '5m',
+    labels: { 'label-key-1': 'label-value-1' },
+    annotations: { [Annotation.summary]: 'test alert' },
+  })
+);
+
 class GrafanaContactPointFactory extends Factory<GrafanaManagedContactPoint> {
   withIntegrations(builder: (factory: GrafanaReceiverConfigFactory) => GrafanaManagedReceiverConfig[]) {
     return this.params({
@@ -282,7 +312,9 @@ export const alertingFactory = {
     alertingRule: rulerAlertingRuleFactory,
     recordingRule: rulerRecordingRuleFactory,
     grafana: {
+      group: rulerGrafanaGroupFactory,
       recordingRule: grafanaRecordingRule,
+      alertingRule: grafanaAlertingRuleFactory,
     },
   },
   dataSource: dataSourceFactory,

public/app/features/alerting/unified/mocks/server/handlers/folders.ts

@@ -4,11 +4,11 @@ import { mockFolder } from 'app/features/alerting/unified/mocks';
 import { grafanaRulerRule } from 'app/features/alerting/unified/mocks/grafanaRulerApi';
 import { FolderDTO } from 'app/types';
 
-const DEFAULT_FOLDERS: FolderDTO[] = [
+export const DEFAULT_FOLDERS: FolderDTO[] = [
   mockFolder({
     id: 1,
-    uid: 'uid',
-    title: 'title',
+    uid: 'e3d1f4fd-9e7c-4f63-9a9e-2b5a1d2e6a9c',
+    title: 'Alerting-folder',
   }),
   mockFolder({
     id: 2,

public/app/features/alerting/unified/mocks/server/handlers/grafanaRuler.ts

@@ -180,6 +180,9 @@ export const rulerRuleVersionHistoryHandler = () => {
       draft.grafana_alert.version = 2;
       draft.grafana_alert.updated = '2025-01-14T09:35:17.000Z';
       draft.for = '2h';
+      if (!draft.labels) {
+        draft.labels = {};
+      }
       draft.labels.foo = 'bar';
       draft.grafana_alert.notification_settings = { receiver: 'another receiver' };
       draft.grafana_alert.updated_by = {

public/app/features/alerting/unified/rule-editor/CloneRuleEditor.test.tsx

@@ -134,7 +134,7 @@ describe('CloneRuleEditor', function () {
           name: 'region: nasa',
         }).get()
       ).toBeInTheDocument();
-      expect(ui.inputs.annotationValue(0).get()).toHaveTextContent(grafanaRulerRule.annotations[Annotation.summary]);
+      expect(ui.inputs.annotationValue(0).get()).toHaveTextContent(grafanaRulerRule.annotations![Annotation.summary]);
     });
   });
 

public/app/features/alerting/unified/rule-editor/RuleEditorExisting.test.tsx

@@ -95,7 +95,7 @@ describe('RuleEditor grafana managed rules', () => {
     expect(nameInput).toHaveValue(grafanaRulerRule.grafana_alert.title);
     //check that folder is in the list
     expect(ui.inputs.folder.get()).toHaveTextContent(new RegExp(folder.title));
-    expect(ui.inputs.annotationValue(0).get()).toHaveValue(grafanaRulerRule.annotations[Annotation.summary]);
+    expect(ui.inputs.annotationValue(0).get()).toHaveValue(grafanaRulerRule.annotations?.[Annotation.summary]);
     expect(screen.getByText('New folder')).toBeInTheDocument();
 
     //check that slashed folders are not in the list

public/app/features/alerting/unified/rule-editor/RuleEditorGrafanaRules.test.tsx

@@ -129,7 +129,7 @@ describe('RuleEditor grafana managed rules', () => {
     expect(nameInput).toHaveValue(grafanaRulerRule.grafana_alert.title);
     //check that folder is in the list
     await waitFor(() => expect(ui.inputs.folder.get()).toHaveTextContent(new RegExp(folder.title)));
-    expect(ui.inputs.annotationValue(0).get()).toHaveValue(grafanaRulerRule.annotations[Annotation.summary]);
+    expect(ui.inputs.annotationValue(0).get()).toHaveValue(grafanaRulerRule.annotations?.[Annotation.summary]);
 
     expect(ui.manualRestoreBanner.get()).toBeInTheDocument(); // check that manual restore banner is shown
 

public/app/features/browse-dashboards/BrowseFolderAlertingPage.test.tsx

@@ -1,44 +1,31 @@
-import { render as rtlRender, screen } from '@testing-library/react';
-import { Chance } from 'chance';
-import { http, HttpResponse } from 'msw';
-import { SetupServer, setupServer } from 'msw/node';
-import { useParams } from 'react-router-dom-v5-compat';
-import { TestProvider } from 'test/helpers/TestProvider';
+import { screen } from '@testing-library/react';
+import { render } from 'test/test-utils';
 
+import { config } from '@grafana/runtime';
 import { contextSrv } from 'app/core/core';
-import { backendSrv } from 'app/core/services/backend_srv';
+import { setupMswServer } from 'app/features/alerting/unified/mockApi';
+
+import { rulerTestDb } from '../alerting/unified/mocks/grafanaRulerApi';
+import { alertingFactory } from '../alerting/unified/mocks/server/db';
+import { DEFAULT_FOLDERS } from '../alerting/unified/mocks/server/handlers/folders';
 
 import BrowseFolderAlertingPage from './BrowseFolderAlertingPage';
-import { getPrometheusRulesResponse, getRulerRulesResponse } from './fixtures/alertRules.fixture';
 import * as permissions from './permissions';
 
-function render(...[ui, options]: Parameters<typeof rtlRender>) {
-  rtlRender(<TestProvider>{ui}</TestProvider>, options);
-}
+// Use the folder and rules from the mocks
+const folder = DEFAULT_FOLDERS[0];
+const { uid: folderUid, title: folderTitle } = folder;
 
-jest.mock('@grafana/runtime', () => ({
-  ...jest.requireActual('@grafana/runtime'),
-  getBackendSrv: () => backendSrv,
-  config: {
-    ...jest.requireActual('@grafana/runtime').config,
-    unifiedAlertingEnabled: true,
-  },
-}));
 jest.mock('react-router-dom-v5-compat', () => ({
   ...jest.requireActual('react-router-dom-v5-compat'),
-  useParams: jest.fn(),
+  useParams: jest.fn(() => ({ uid: folderUid })),
 }));
-const mockFolderName = 'myFolder';
-const mockFolderUid = '12345';
 
-const random = Chance(1);
-const rule_uid = random.guid();
-const mockRulerRulesResponse = getRulerRulesResponse(mockFolderName, mockFolderUid, rule_uid);
-const mockPrometheusRulesResponse = getPrometheusRulesResponse(mockFolderName, mockFolderUid, rule_uid);
+config.unifiedAlertingEnabled = true;
+
+setupMswServer();
 
 describe('browse-dashboards BrowseFolderAlertingPage', () => {
-  (useParams as jest.Mock).mockReturnValue({ uid: mockFolderUid });
-  let server: SetupServer;
   const mockPermissions = {
     canCreateDashboards: true,
     canEditDashboards: true,
@@ -49,28 +36,6 @@ describe('browse-dashboards BrowseFolderAlertingPage', () => {
     canSetPermissions: true,
   };
 
-  beforeAll(() => {
-    server = setupServer(
-      http.get('/api/folders/:uid', () => {
-        return HttpResponse.json({
-          title: mockFolderName,
-          uid: mockFolderUid,
-        });
-      }),
-      http.get('api/ruler/grafana/api/v1/rules', () => {
-        return HttpResponse.json(mockRulerRulesResponse);
-      }),
-      http.get('api/prometheus/grafana/api/v1/rules', () => {
-        return HttpResponse.json(mockPrometheusRulesResponse);
-      })
-    );
-    server.listen();
-  });
-
-  afterAll(() => {
-    server.close();
-  });
-
   beforeEach(() => {
     jest.spyOn(permissions, 'getFolderPermissions').mockImplementation(() => mockPermissions);
     jest.spyOn(contextSrv, 'hasPermission').mockReturnValue(true);
@@ -78,12 +43,11 @@ describe('browse-dashboards BrowseFolderAlertingPage', () => {
 
   afterEach(() => {
     jest.restoreAllMocks();
-    server.resetHandlers();
   });
 
   it('displays the folder title', async () => {
     render(<BrowseFolderAlertingPage />);
-    expect(await screen.findByRole('heading', { name: mockFolderName })).toBeInTheDocument();
+    expect(await screen.findByRole('heading', { name: folderTitle })).toBeInTheDocument();
   });
 
   it('displays the "Folder actions" button', async () => {
@@ -102,7 +66,7 @@ describe('browse-dashboards BrowseFolderAlertingPage', () => {
       };
     });
     render(<BrowseFolderAlertingPage />);
-    expect(await screen.findByRole('heading', { name: mockFolderName })).toBeInTheDocument();
+    expect(await screen.findByRole('heading', { name: folderTitle })).toBeInTheDocument();
     expect(screen.queryByRole('button', { name: 'Folder actions' })).not.toBeInTheDocument();
   });
 
@@ -118,10 +82,24 @@ describe('browse-dashboards BrowseFolderAlertingPage', () => {
     expect(await screen.findByRole('tab', { name: 'Alert rules' })).toHaveAttribute('aria-selected', 'true');
   });
 
-  it('displays the alert rules returned by the API', async () => {
+  it('displays rules from the folder', async () => {
+    const ruleUid = 'xYz1A2b3C4';
+
+    const group = alertingFactory.ruler.grafana.group.build({
+      name: 'test-group',
+      rules: [
+        alertingFactory.ruler.grafana.alertingRule.build({
+          grafana_alert: { title: 'Grafana-rule', namespace_uid: folderUid, rule_group: 'test-group', uid: ruleUid },
+        }),
+      ],
+    });
+    rulerTestDb.addGroup(group, { name: folderTitle, uid: folderUid });
     render(<BrowseFolderAlertingPage />);
 
-    const ruleName = mockPrometheusRulesResponse.data.groups[0].rules[0].name;
-    expect(await screen.findByRole('link', { name: ruleName })).toBeInTheDocument();
+    expect(await screen.findByRole('heading', { name: folderTitle })).toBeInTheDocument();
+    expect(await screen.findByRole('link', { name: 'Grafana-rule' })).toHaveAttribute(
+      'href',
+      `/alerting/grafana/${ruleUid}/view`
+    );
   });
 });

public/app/features/browse-dashboards/BrowseFolderAlertingPage.tsx

@@ -1,19 +1,35 @@
 import { useMemo } from 'react';
 import { useParams } from 'react-router-dom-v5-compat';
 
+import { Alert } from '@grafana/ui';
 import { Page } from 'app/core/components/Page/Page';
+import { t } from 'app/core/internationalization';
 import { buildNavModel, getAlertingTabID } from 'app/features/folders/state/navModel';
-import { useSelector } from 'app/types';
 
 import { AlertsFolderView } from '../alerting/unified/AlertsFolderView';
+import { alertRuleApi } from '../alerting/unified/api/alertRuleApi';
+import { GRAFANA_RULER_CONFIG } from '../alerting/unified/api/featureDiscoveryApi';
+import { stringifyErrorLike } from '../alerting/unified/utils/misc';
+import { rulerRuleType } from '../alerting/unified/utils/rules';
 
 import { useGetFolderQuery, useSaveFolderMutation } from './api/browseDashboardsAPI';
 import { FolderActionsButton } from './components/FolderActionsButton';
 
+const { useRulerNamespaceQuery } = alertRuleApi;
+
 export function BrowseFolderAlertingPage() {
   const { uid: folderUID = '' } = useParams();
-  const { data: folderDTO } = useGetFolderQuery(folderUID);
-  const folder = useSelector((state) => state.folder);
+  const { data: folderDTO, isLoading: isFolderLoading } = useGetFolderQuery(folderUID);
+
+  const {
+    data: rulerNamespace = {},
+    isLoading: isRulerNamespaceLoading,
+    error: rulerNamespaceError,
+  } = useRulerNamespaceQuery({
+    rulerConfig: GRAFANA_RULER_CONFIG,
+    namespace: folderUID,
+  });
+
   const [saveFolder] = useSaveFolderMutation();
 
   const navModel = useMemo(() => {
@@ -45,6 +61,12 @@ export function BrowseFolderAlertingPage() {
       }
     : undefined;
 
+  const isLoading = isFolderLoading || isRulerNamespaceLoading;
+  const folderRules = Object.values(rulerNamespace)
+    .flatMap((group) => group)
+    .flatMap((group) => group.rules)
+    .filter(rulerRuleType.grafana.rule);
+
   return (
     <Page
       navId="dashboards/browse"
@@ -52,8 +74,21 @@ export function BrowseFolderAlertingPage() {
       onEditTitle={onEditTitle}
       actions={<>{folderDTO && <FolderActionsButton folder={folderDTO} />}</>}
     >
-      <Page.Contents>
-        <AlertsFolderView folder={folder} />
+      <Page.Contents isLoading={isLoading}>
+        {!folderDTO && (
+          <Alert
+            title={t('browse-dashboards.browse-folder-alerting-page.title-folder-not-found', 'Folder not found')}
+          />
+        )}
+        {!!rulerNamespaceError && (
+          <Alert
+            title={t('browse-dashboards.browse-folder-alerting-page.title-ruler-namespace-error', 'Cannot load rules')}
+            severity="error"
+          >
+            {stringifyErrorLike(rulerNamespaceError)}
+          </Alert>
+        )}
+        {folderDTO && <AlertsFolderView folder={folderDTO} rules={folderRules} />}
       </Page.Contents>
     </Page>
   );

public/app/types/unified-alerting-dto.ts

@@ -301,8 +301,8 @@ export interface RulerGrafanaRuleDTO<T = GrafanaRuleDefinition> {
   grafana_alert: T;
   for?: string;
   keep_firing_for?: string;
-  annotations: Annotations;
-  labels: Labels;
+  annotations?: Annotations;
+  labels?: Labels;
 }
 
 export type TopLevelGrafanaRuleDTOField = keyof Omit<RulerGrafanaRuleDTO, 'grafana_alert'>;

public/locales/en-US/grafana.json

@@ -2799,6 +2799,10 @@
     "actions": {
       "button-to-recently-deleted": "Recently deleted"
     },
+    "browse-folder-alerting-page": {
+      "title-folder-not-found": "Folder not found",
+      "title-ruler-namespace-error": "Cannot load rules"
+    },
     "browse-view": {
       "this-folder-is-empty": "This folder is empty"
     },