Scenes: Add alerts from panel edit (#81588)

* Display alerts in scenes dashboard

* sort of working adding alerts

* move alert button to own component

* First fixes

* Generate link/url on click

* some cleanup

* making sure all links from scene go back to scene dashboard/panel; add rule button when there are rules; styling

* remove unused import

* add &scenes to url for alert instance annotations

* Add tests from old alert tab

* Revert addition of &scenes to dashboard urls

* Refactor to simplify NewAlertRuleButton interface

* update test

* Use the raw range to calculate the relative range

---------

Co-authored-by: Torkel Ödegaard <torkel@grafana.com>
Co-authored-by: Dominik Prokop <dominik.prokop@grafana.com>

public/app/features/alerting/unified/utils/rule-form.ts

@@ -13,9 +13,15 @@ import {
 } from '@grafana/data';
 import { getDataSourceSrv } from '@grafana/runtime';
 import { ExpressionDatasourceRef } from '@grafana/runtime/src/utils/DataSourceWithBackend';
+import { sceneGraph, VizPanel } from '@grafana/scenes';
 import { DataSourceJsonData } from '@grafana/schema';
 import { getNextRefIdChar } from 'app/core/utils/query';
 import { DashboardModel, PanelModel } from 'app/features/dashboard/state';
+import {
+  getDashboardSceneFor,
+  getPanelIdForVizPanel,
+  getQueryRunnerFor,
+} from 'app/features/dashboard-scene/utils/utils';
 import { ExpressionDatasourceUID, ExpressionQuery, ExpressionQueryType } from 'app/features/expressions/types';
 import { LokiQuery } from 'app/plugins/datasource/loki/types';
 import { PromQuery } from 'app/plugins/datasource/prometheus/types';
@@ -482,7 +488,7 @@ const dataQueriesToGrafanaQueries = async (
     };
 
     const interpolatedTarget = datasource.interpolateVariablesInQueries
-      ? await datasource.interpolateVariablesInQueries([target], queryVariables)[0]
+      ? datasource.interpolateVariablesInQueries([target], queryVariables)[0]
       : target;
 
     // expressions
@@ -579,6 +585,77 @@ export const panelToRuleFormValues = async (
   return formValues;
 };
 
+export const scenesPanelToRuleFormValues = async (vizPanel: VizPanel): Promise<Partial<RuleFormValues> | undefined> => {
+  if (!vizPanel.state.key) {
+    return undefined;
+  }
+
+  const timeRange = sceneGraph.getTimeRange(vizPanel);
+  const queryRunner = getQueryRunnerFor(vizPanel);
+  if (!queryRunner) {
+    return undefined;
+  }
+  const { queries, datasource, maxDataPoints, minInterval } = queryRunner.state;
+
+  const dashboard = getDashboardSceneFor(vizPanel);
+  if (!dashboard || !dashboard.state.uid) {
+    return undefined;
+  }
+
+  const grafanaQueries = await dataQueriesToGrafanaQueries(
+    queries,
+    rangeUtil.timeRangeToRelative(rangeUtil.convertRawToRange(timeRange.state.value.raw)),
+    { __sceneObject: { value: vizPanel } },
+    datasource,
+    maxDataPoints,
+    minInterval
+  );
+
+  // if no alerting capable queries are found, can't create a rule
+  if (!grafanaQueries.length || !grafanaQueries.find((query) => query.datasourceUid !== ExpressionDatasourceUID)) {
+    return undefined;
+  }
+
+  if (!grafanaQueries.find((query) => query.datasourceUid === ExpressionDatasourceUID)) {
+    const [reduceExpression, _thresholdExpression] = getDefaultExpressions(getNextRefIdChar(grafanaQueries), '-');
+    grafanaQueries.push(reduceExpression);
+
+    const [_reduceExpression, thresholdExpression] = getDefaultExpressions(
+      reduceExpression.refId,
+      getNextRefIdChar(grafanaQueries)
+    );
+    grafanaQueries.push(thresholdExpression);
+  }
+
+  const { folderTitle, folderUid } = dashboard.state.meta;
+
+  const formValues = {
+    type: RuleFormType.grafana,
+    folder:
+      folderUid && folderTitle
+        ? {
+            uid: folderUid,
+            title: folderTitle,
+          }
+        : undefined,
+    queries: grafanaQueries,
+    name: vizPanel.state.title,
+    condition: grafanaQueries[grafanaQueries.length - 1].refId,
+    annotations: [
+      {
+        key: Annotation.dashboardUID,
+        value: dashboard.state.uid,
+      },
+      {
+        key: Annotation.panelID,
+
+        value: String(getPanelIdForVizPanel(vizPanel)),
+      },
+    ],
+  };
+  return formValues;
+};
+
 export function getIntervals(range: TimeRange, lowLimit?: string, resolution?: number): IntervalValues {
   if (!resolution) {
     if (lowLimit && rangeUtil.intervalToMs(lowLimit) > 1000) {

public/app/features/dashboard-scene/panel-edit/PanelDataPane/NewAlertRuleButton.tsx

@@ -0,0 +1,51 @@
+import React from 'react';
+import { useLocation } from 'react-router-dom';
+import { useAsync } from 'react-use';
+
+import { urlUtil } from '@grafana/data';
+import { locationService, logInfo } from '@grafana/runtime';
+import { VizPanel } from '@grafana/scenes';
+import { Alert, Button } from '@grafana/ui';
+import { LogMessages } from 'app/features/alerting/unified/Analytics';
+import { scenesPanelToRuleFormValues } from 'app/features/alerting/unified/utils/rule-form';
+
+interface ScenesNewRuleFromPanelButtonProps {
+  panel: VizPanel;
+  className?: string;
+}
+export const ScenesNewRuleFromPanelButton = ({ panel, className }: ScenesNewRuleFromPanelButtonProps) => {
+  const location = useLocation();
+
+  const { loading, value: formValues } = useAsync(() => scenesPanelToRuleFormValues(panel), [panel]);
+
+  if (loading) {
+    return <Button disabled={true}>New alert rule</Button>;
+  }
+
+  if (!formValues) {
+    return (
+      <Alert severity="info" title="No alerting capable query found">
+        Cannot create alerts from this panel because no query to an alerting capable datasource is found.
+      </Alert>
+    );
+  }
+
+  const onClick = async () => {
+    logInfo(LogMessages.alertRuleFromPanel);
+
+    const updateToDateFormValues = await scenesPanelToRuleFormValues(panel);
+
+    const ruleFormUrl = urlUtil.renderUrl('/alerting/new', {
+      defaults: JSON.stringify(updateToDateFormValues),
+      returnTo: location.pathname + location.search,
+    });
+
+    locationService.push(ruleFormUrl);
+  };
+
+  return (
+    <Button icon="bell" onClick={onClick} className={className} data-testid="create-alert-rule-button">
+      New alert rule
+    </Button>
+  );
+};

public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataAlertingTab.test.tsx

@@ -0,0 +1,356 @@
+import { act, render } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+import React from 'react';
+import { TestProvider } from 'test/helpers/TestProvider';
+import { byTestId } from 'testing-library-selector';
+
+import { DataSourceApi } from '@grafana/data';
+import { locationService, setDataSourceSrv } from '@grafana/runtime';
+import { fetchRules } from 'app/features/alerting/unified/api/prometheus';
+import { fetchRulerRules } from 'app/features/alerting/unified/api/ruler';
+import * as ruleActionButtons from 'app/features/alerting/unified/components/rules/RuleActionsButtons';
+import {
+  MockDataSourceSrv,
+  grantUserPermissions,
+  mockDataSource,
+  mockPromAlertingRule,
+  mockPromRuleGroup,
+  mockPromRuleNamespace,
+  mockRulerGrafanaRule,
+} from 'app/features/alerting/unified/mocks';
+import { RuleFormValues } from 'app/features/alerting/unified/types/rule-form';
+import * as config from 'app/features/alerting/unified/utils/config';
+import { Annotation } from 'app/features/alerting/unified/utils/constants';
+import { DataSourceType, GRAFANA_RULES_SOURCE_NAME } from 'app/features/alerting/unified/utils/datasource';
+import { DashboardModel, PanelModel } from 'app/features/dashboard/state';
+import { getDatasourceSrv } from 'app/features/plugins/datasource_srv';
+import { PrometheusDatasource } from 'app/plugins/datasource/prometheus/datasource';
+import { PromOptions } from 'app/plugins/datasource/prometheus/types';
+import { configureStore } from 'app/store/configureStore';
+import { AccessControlAction } from 'app/types';
+import { AlertQuery } from 'app/types/unified-alerting-dto';
+
+import { createDashboardSceneFromDashboardModel } from '../../serialization/transformSaveModelToScene';
+import { findVizPanelByKey, getVizPanelKeyForPanelId } from '../../utils/utils';
+import * as utils from '../../utils/utils';
+import { VizPanelManager } from '../VizPanelManager';
+
+import { PanelDataAlertingTab, PanelDataAlertingTabRendered } from './PanelDataAlertingTab';
+
+/**
+ * These tests has been copied from public/app/features/alerting/unified/PanelAlertTabContent.test.tsx and been slightly modified to make sure the scenes alert edit tab is as close to the old alert edit tab as possible
+ */
+
+jest.mock('app/features/alerting/unified/api/prometheus');
+jest.mock('app/features/alerting/unified/api/ruler');
+
+jest.spyOn(config, 'getAllDataSources');
+jest.spyOn(ruleActionButtons, 'matchesWidth').mockReturnValue(false);
+
+const dataSources = {
+  prometheus: mockDataSource<PromOptions>({
+    name: 'Prometheus',
+    type: DataSourceType.Prometheus,
+    isDefault: false,
+  }),
+  default: mockDataSource<PromOptions>({
+    name: 'Default',
+    type: DataSourceType.Prometheus,
+    isDefault: true,
+  }),
+};
+dataSources.prometheus.meta.alerting = true;
+dataSources.default.meta.alerting = true;
+
+const mocks = {
+  getAllDataSources: jest.mocked(config.getAllDataSources),
+  api: {
+    fetchRules: jest.mocked(fetchRules),
+    fetchRulerRules: jest.mocked(fetchRulerRules),
+  },
+};
+
+const renderAlertTabContent = (model: PanelDataAlertingTab, initialStore?: ReturnType<typeof configureStore>) => {
+  render(
+    <TestProvider store={initialStore}>
+      <PanelDataAlertingTabRendered model={model}></PanelDataAlertingTabRendered>
+    </TestProvider>
+  );
+};
+
+const rules = [
+  mockPromRuleNamespace({
+    name: 'default',
+    groups: [
+      mockPromRuleGroup({
+        name: 'mygroup',
+        rules: [
+          mockPromAlertingRule({
+            name: 'dashboardrule1',
+            annotations: {
+              [Annotation.dashboardUID]: '12',
+              [Annotation.panelID]: '34',
+            },
+          }),
+        ],
+      }),
+      mockPromRuleGroup({
+        name: 'othergroup',
+        rules: [
+          mockPromAlertingRule({
+            name: 'dashboardrule2',
+            annotations: {
+              [Annotation.dashboardUID]: '121',
+              [Annotation.panelID]: '341',
+            },
+          }),
+        ],
+      }),
+    ],
+  }),
+];
+
+const rulerRules = {
+  default: [
+    {
+      name: 'mygroup',
+      rules: [
+        mockRulerGrafanaRule(
+          {
+            annotations: {
+              [Annotation.dashboardUID]: '12',
+              [Annotation.panelID]: '34',
+            },
+          },
+          {
+            title: 'dashboardrule1',
+          }
+        ),
+      ],
+    },
+    {
+      name: 'othergroup',
+      rules: [
+        mockRulerGrafanaRule(
+          {
+            annotations: {
+              [Annotation.dashboardUID]: '121',
+              [Annotation.panelID]: '341',
+            },
+          },
+          {
+            title: 'dashboardrule2',
+          }
+        ),
+      ],
+    },
+  ],
+};
+
+const dashboard = {
+  uid: '12',
+  time: {
+    from: 'now-6h',
+    to: 'now',
+  },
+  timepicker: { refresh_intervals: 5 },
+  meta: {
+    canSave: true,
+    folderId: 1,
+    folderTitle: 'super folder',
+  },
+} as unknown as DashboardModel;
+
+const panel = new PanelModel({
+  datasource: {
+    type: 'prometheus',
+    uid: dataSources.prometheus.uid,
+  },
+  title: 'mypanel',
+  id: 34,
+  targets: [
+    {
+      expr: 'sum(some_metric [$__interval])) by (app)',
+      refId: 'A',
+    },
+  ],
+});
+
+const ui = {
+  row: byTestId('row'),
+  createButton: byTestId<HTMLButtonElement>('create-alert-rule-button'),
+};
+
+describe('PanelAlertTabContent', () => {
+  beforeEach(() => {
+    jest.resetAllMocks();
+    grantUserPermissions([
+      AccessControlAction.AlertingRuleRead,
+      AccessControlAction.AlertingRuleUpdate,
+      AccessControlAction.AlertingRuleDelete,
+      AccessControlAction.AlertingRuleCreate,
+      AccessControlAction.AlertingRuleExternalRead,
+      AccessControlAction.AlertingRuleExternalWrite,
+    ]);
+    mocks.getAllDataSources.mockReturnValue(Object.values(dataSources));
+    const dsService = new MockDataSourceSrv(dataSources);
+    dsService.datasources[dataSources.prometheus.uid] = new PrometheusDatasource(
+      dataSources.prometheus
+    ) as DataSourceApi;
+    dsService.datasources[dataSources.default.uid] = new PrometheusDatasource(dataSources.default) as DataSourceApi;
+    setDataSourceSrv(dsService);
+  });
+
+  it('Will take into account panel maxDataPoints', async () => {
+    dashboard.panels = [
+      new PanelModel({
+        ...panel,
+        maxDataPoints: 100,
+        interval: '10s',
+      }),
+    ];
+
+    renderAlertTab(dashboard);
+
+    const defaults = await clickNewButton();
+
+    expect(defaults.queries[0].model).toEqual({
+      expr: 'sum(some_metric [5m])) by (app)',
+      refId: 'A',
+      datasource: {
+        type: 'prometheus',
+        uid: 'mock-ds-2',
+      },
+      interval: '',
+      intervalMs: 300000,
+      maxDataPoints: 100,
+    });
+  });
+
+  it('Will work with default datasource', async () => {
+    dashboard.panels = [
+      new PanelModel({
+        ...panel,
+        datasource: undefined,
+        maxDataPoints: 100,
+        interval: '10s',
+      }),
+    ];
+
+    renderAlertTab(dashboard);
+    const defaults = await clickNewButton();
+
+    expect(defaults.queries[0].model).toEqual({
+      expr: 'sum(some_metric [5m])) by (app)',
+      refId: 'A',
+      datasource: {
+        type: 'prometheus',
+        uid: 'mock-ds-3',
+      },
+      interval: '',
+      intervalMs: 300000,
+      maxDataPoints: 100,
+    });
+  });
+
+  it('Will take into account datasource minInterval', async () => {
+    (getDatasourceSrv() as unknown as MockDataSourceSrv).datasources[dataSources.prometheus.uid].interval = '7m';
+
+    dashboard.panels = [
+      new PanelModel({
+        ...panel,
+        maxDataPoints: 100,
+      }),
+    ];
+
+    renderAlertTab(dashboard);
+    const defaults = await clickNewButton();
+
+    expect(defaults.queries[0].model).toEqual({
+      expr: 'sum(some_metric [7m])) by (app)',
+      refId: 'A',
+      datasource: {
+        type: 'prometheus',
+        uid: 'mock-ds-2',
+      },
+      interval: '',
+      intervalMs: 420000,
+      maxDataPoints: 100,
+    });
+  });
+
+  it('Will render alerts belonging to panel and a button to create alert from panel queries', async () => {
+    mocks.api.fetchRules.mockResolvedValue(rules);
+    mocks.api.fetchRulerRules.mockResolvedValue(rulerRules);
+
+    dashboard.panels = [panel];
+
+    renderAlertTab(dashboard);
+
+    const rows = await ui.row.findAll();
+    expect(rows).toHaveLength(1);
+    expect(rows[0]).toHaveTextContent(/dashboardrule1/);
+    expect(rows[0]).not.toHaveTextContent(/dashboardrule2/);
+
+    const defaults = await clickNewButton();
+
+    const defaultsWithDeterministicTime: Partial<RuleFormValues> = {
+      ...defaults,
+      queries: defaults.queries.map((q: AlertQuery) => {
+        return {
+          ...q,
+          // Fix computed time stamp to avoid assertion flakiness
+          ...(q.relativeTimeRange ? { relativeTimeRange: { from: 21600, to: 0 } } : {}),
+        };
+      }),
+    };
+
+    expect(defaultsWithDeterministicTime).toMatchSnapshot();
+
+    expect(mocks.api.fetchRulerRules).toHaveBeenCalledWith(
+      { dataSourceName: GRAFANA_RULES_SOURCE_NAME, apiVersion: 'legacy' },
+      {
+        dashboardUID: dashboard.uid,
+        panelId: panel.id,
+      }
+    );
+    expect(mocks.api.fetchRules).toHaveBeenCalledWith(
+      GRAFANA_RULES_SOURCE_NAME,
+      {
+        dashboardUID: dashboard.uid,
+        panelId: panel.id,
+      },
+      undefined,
+      undefined,
+      undefined,
+      undefined
+    );
+  });
+});
+
+function renderAlertTab(dashboard: DashboardModel) {
+  const model = createModel(dashboard);
+  renderAlertTabContent(model);
+}
+
+async function clickNewButton() {
+  const pushMock = jest.fn();
+  const oldPush = locationService.push;
+  locationService.push = pushMock;
+  const button = await ui.createButton.find();
+  await act(async () => {
+    await userEvent.click(button);
+  });
+  const match = pushMock.mock.lastCall[0].match(/alerting\/new\?defaults=(.*)&returnTo=/);
+  const defaults = JSON.parse(decodeURIComponent(match![1]));
+  locationService.push = oldPush;
+  return defaults;
+}
+
+function createModel(dashboard: DashboardModel) {
+  const scene = createDashboardSceneFromDashboardModel(dashboard);
+  const vizPanel = findVizPanelByKey(scene, getVizPanelKeyForPanelId(34));
+  const model = new PanelDataAlertingTab(new VizPanelManager(vizPanel!.clone()));
+  jest.spyOn(utils, 'getDashboardSceneFor').mockReturnValue(scene);
+  return model;
+}

public/app/features/dashboard-scene/panel-edit/PanelDataPane/PanelDataAlertingTab.tsx

@@ -1,13 +1,18 @@
+import { css } from '@emotion/css';
 import React from 'react';
 
+import { GrafanaTheme2 } from '@grafana/data';
 import { SceneObjectBase, SceneComponentProps } from '@grafana/scenes';
-import { Alert, LoadingPlaceholder, Tab } from '@grafana/ui';
+import { Alert, LoadingPlaceholder, Tab, useStyles2 } from '@grafana/ui';
+import { contextSrv } from 'app/core/core';
 import { RulesTable } from 'app/features/alerting/unified/components/rules/RulesTable';
 import { usePanelCombinedRules } from 'app/features/alerting/unified/hooks/usePanelCombinedRules';
+import { getRulesPermissions } from 'app/features/alerting/unified/utils/access-control';
 
 import { getDashboardSceneFor, getPanelIdForVizPanel } from '../../utils/utils';
 import { VizPanelManager } from '../VizPanelManager';
 
+import { ScenesNewRuleFromPanelButton } from './NewAlertRuleButton';
 import { PanelDataPaneTabState, PanelDataPaneTab, TabId, PanelDataTabHeaderProps } from './types';
 
 export class PanelDataAlertingTab extends SceneObjectBase<PanelDataPaneTabState> implements PanelDataPaneTab {
@@ -22,31 +27,46 @@ export class PanelDataAlertingTab extends SceneObjectBase<PanelDataPaneTabState>
     this.TabComponent = (props: PanelDataTabHeaderProps) => AlertingTab({ ...props, model: this });
     this._panelManager = panelManager;
   }
+
   getTabLabel() {
     return 'Alert';
   }
 
   getDashboardUID() {
-    const dashboard = getDashboardSceneFor(this._panelManager);
+    const dashboard = this.getDashboard();
     return dashboard.state.uid!;
   }
 
-  getPanelId() {
+  getDashboard() {
+    return getDashboardSceneFor(this._panelManager);
+  }
+
+  getLegacyPanelId() {
     return getPanelIdForVizPanel(this._panelManager.state.panel);
   }
 
+  getCanCreateRules() {
+    const rulesPermissions = getRulesPermissions('grafana');
+    return this.getDashboard().state.meta.canSave && contextSrv.hasPermission(rulesPermissions.create);
+  }
+
   get panelManager() {
     return this._panelManager;
   }
+
+  get panel() {
+    return this._panelManager.state.panel;
+  }
 }
 
-function PanelDataAlertingTabRendered(props: SceneComponentProps<PanelDataAlertingTab>) {
+export function PanelDataAlertingTabRendered(props: SceneComponentProps<PanelDataAlertingTab>) {
   const { model } = props;
 
+  const styles = useStyles2(getStyles);
+
   const { errors, loading, rules } = usePanelCombinedRules({
     dashboardUID: model.getDashboardUID(),
-    panelId: model.getPanelId(),
+    panelId: model.getLegacyPanelId(),
-    poll: true,
   });
 
   const alert = errors.length ? (
@@ -66,19 +86,36 @@ function PanelDataAlertingTabRendered(props: SceneComponentProps<PanelDataAlerti
     );
   }
 
+  const { panel } = model;
+  const canCreateRules = model.getCanCreateRules();
+
   if (rules.length) {
-    return <RulesTable rules={rules} />;
+    return (
+      <>
+        <RulesTable rules={rules} />
+        {canCreateRules && <ScenesNewRuleFromPanelButton className={styles.newButton} panel={panel} />}
+      </>
+    );
   }
 
-  // TODO: this is the tricky part, converting queries and such to pre populate the new alert form when clicking the button
   return (
-    <div>
+    <div className={styles.noRulesWrapper}>
       <p>There are no alert rules linked to this panel.</p>
-      <button>New alert placeholder</button>
+      {canCreateRules && <ScenesNewRuleFromPanelButton panel={panel}></ScenesNewRuleFromPanelButton>}
     </div>
   );
 }
 
+const getStyles = (theme: GrafanaTheme2) => ({
+  newButton: css({
+    marginTop: theme.spacing(3),
+  }),
+  noRulesWrapper: css({
+    margin: theme.spacing(2),
+    backgroundColor: theme.colors.background.secondary,
+    padding: theme.spacing(3),
+  }),
+});
 interface PanelDataAlertingTabHeaderProps extends PanelDataTabHeaderProps {
   model: PanelDataAlertingTab;
 }
@@ -88,7 +125,7 @@ function AlertingTab(props: PanelDataAlertingTabHeaderProps) {
 
   const { rules } = usePanelCombinedRules({
     dashboardUID: model.getDashboardUID(),
-    panelId: model.getPanelId(),
+    panelId: model.getLegacyPanelId(),
     poll: false,
   });
 

public/app/features/dashboard-scene/panel-edit/PanelDataPane/__snapshots__/PanelDataAlertingTab.test.tsx.snap

@@ -0,0 +1,113 @@
+// Jest Snapshot v1, https://goo.gl/fbAQLP
+
+exports[`PanelAlertTabContent Will render alerts belonging to panel and a button to create alert from panel queries 1`] = `
+{
+  "annotations": [
+    {
+      "key": "__dashboardUid__",
+      "value": "12",
+    },
+    {
+      "key": "__panelId__",
+      "value": "34",
+    },
+  ],
+  "condition": "C",
+  "name": "mypanel",
+  "queries": [
+    {
+      "datasourceUid": "mock-ds-2",
+      "model": {
+        "datasource": {
+          "type": "prometheus",
+          "uid": "mock-ds-2",
+        },
+        "expr": "sum(some_metric [15s])) by (app)",
+        "interval": "",
+        "intervalMs": 15000,
+        "refId": "A",
+      },
+      "queryType": "",
+      "refId": "A",
+      "relativeTimeRange": {
+        "from": 21600,
+        "to": 0,
+      },
+    },
+    {
+      "datasourceUid": "__expr__",
+      "model": {
+        "conditions": [
+          {
+            "evaluator": {
+              "params": [],
+              "type": "gt",
+            },
+            "operator": {
+              "type": "and",
+            },
+            "query": {
+              "params": [
+                "B",
+              ],
+            },
+            "reducer": {
+              "params": [],
+              "type": "last",
+            },
+            "type": "query",
+          },
+        ],
+        "datasource": {
+          "type": "__expr__",
+          "uid": "__expr__",
+        },
+        "expression": "A",
+        "reducer": "last",
+        "refId": "B",
+        "type": "reduce",
+      },
+      "queryType": "",
+      "refId": "B",
+    },
+    {
+      "datasourceUid": "__expr__",
+      "model": {
+        "conditions": [
+          {
+            "evaluator": {
+              "params": [
+                0,
+              ],
+              "type": "gt",
+            },
+            "operator": {
+              "type": "and",
+            },
+            "query": {
+              "params": [
+                "C",
+              ],
+            },
+            "reducer": {
+              "params": [],
+              "type": "last",
+            },
+            "type": "query",
+          },
+        ],
+        "datasource": {
+          "type": "__expr__",
+          "uid": "__expr__",
+        },
+        "expression": "B",
+        "refId": "C",
+        "type": "threshold",
+      },
+      "queryType": "",
+      "refId": "C",
+    },
+  ],
+  "type": "grafana",
+}
+`;