Azure Monitor: Fix bug that did not show alert rule preview (#68339)

public/app/plugins/datasource/azuremonitor/utils/migrateQuery.test.ts

@@ -27,6 +27,8 @@ const azureMonitorQueryV9_0 = {
     dimensionFilters: [],
     metricName: 'dependencies/duration',
     metricNamespace: 'microsoft.insights/components',
+    resourceGroup: 'cloud-datasources',
+    resourceName: 'AppInsightsTestData',
     resourceUri:
       '/subscriptions/44693801-6ee6-49de-9b2d-9106972f9572/resourceGroups/cloud-datasources/providers/microsoft.insights/components/AppInsightsTestData',
     timeGrain: 'auto',
@@ -204,9 +206,22 @@ describe('AzureMonitor: migrateQuery', () => {
         })
       );
     });
+
+    it('correctly remove outdated fields', () => {
+      const result = migrateQuery(azureMonitorQueryV9_0);
+      expect(result).toMatchObject(
+        expect.objectContaining({
+          azureMonitor: expect.objectContaining({
+            resources: modernMetricsQuery.azureMonitor!.resources,
+          }),
+        })
+      );
+      expect(result.azureMonitor).not.toHaveProperty('resourceGroup');
+      expect(result.azureMonitor).not.toHaveProperty('resourceName');
+    });
   });
 
-  it('should migrate a sigle resource for Logs', () => {
+  it('should migrate a single resource for Logs', () => {
     const q = {
       ...modernMetricsQuery,
       azureLogAnalytics: {

public/app/plugins/datasource/azuremonitor/utils/migrateQuery.ts

@@ -176,13 +176,22 @@ function migrateDimensionToResourceObj(query: AzureMonitorQuery): AzureMonitorQu
 function migrateResourceGroupAndName(query: AzureMonitorQuery): AzureMonitorQuery {
   let workingQuery = query;
 
-  if (workingQuery.azureMonitor) {
-    workingQuery.azureMonitor.resources = [
-      { resourceGroup: workingQuery.azureMonitor.resourceGroup, resourceName: workingQuery.azureMonitor.resourceName },
-    ];
+  if (workingQuery.azureMonitor?.resourceGroup && workingQuery.azureMonitor?.resourceName) {
+    workingQuery = {
+      ...workingQuery,
+      azureMonitor: {
+        ...workingQuery.azureMonitor,
+        resources: [
+          {
+            resourceGroup: workingQuery.azureMonitor.resourceGroup,
+            resourceName: workingQuery.azureMonitor.resourceName,
+          },
+        ],
+      },
+    };
 
-    delete workingQuery.azureMonitor.resourceGroup;
-    delete workingQuery.azureMonitor.resourceName;
+    delete workingQuery.azureMonitor?.resourceGroup;
+    delete workingQuery.azureMonitor?.resourceName;
   }
 
   return workingQuery;