Alerting: Use folder_uid instead of file for Grafana managed alert rules (#88497)

public/app/features/alerting/unified/api/alertRuleApi.ts

@@ -1,3 +1,5 @@
+import { set } from 'lodash';
+
 import { RelativeTimeRange } from '@grafana/data';
 import { Matcher } from 'app/plugins/datasource/alertmanager/types';
 import { RuleIdentifier, RuleNamespace, RulerDataSourceConfig } from 'app/types/unified-alerting';
@@ -17,7 +19,7 @@ import {
 
 import { ExportFormats } from '../components/export/providers';
 import { Folder } from '../components/rule-editor/RuleFolderPicker';
-import { getDatasourceAPIUid, GRAFANA_RULES_SOURCE_NAME } from '../utils/datasource';
+import { getDatasourceAPIUid, GRAFANA_RULES_SOURCE_NAME, isGrafanaRulesSource } from '../utils/datasource';
 import { arrayKeyValuesToObject } from '../utils/labels';
 import { isCloudRuleIdentifier, isPrometheusRuleIdentifier } from '../utils/rules';
 
@@ -174,13 +176,20 @@ export const alertRuleApi = alertingApi.injectEndpoints({
     >({
       query: ({ ruleSourceName, namespace, groupName, ruleName, dashboardUid, panelId }) => {
         const queryParams: Record<string, string | undefined> = {
-          file: namespace,
           rule_group: groupName,
           rule_name: ruleName,
           dashboard_uid: dashboardUid, // Supported only by Grafana managed rules
           panel_id: panelId?.toString(), // Supported only by Grafana managed rules
         };
 
+        if (namespace) {
+          if (isGrafanaRulesSource(ruleSourceName)) {
+            set(queryParams, 'folder_uid', namespace);
+          } else {
+            set(queryParams, 'file', namespace);
+          }
+        }
+
         return {
           url: `api/prometheus/${getDatasourceAPIUid(ruleSourceName)}/api/v1/rules`,
           params: queryParams,