fix(core): Handle insights by workflow table for deleted workflows (#18496)

packages/@n8n/api-types/src/schemas/__tests__/insights.schema.test.ts

@@ -69,24 +69,40 @@ describe('insightsSummarySchema', () => {
 });
 
 describe('insightsByWorkflowSchema', () => {
+	const validInsightsByWorkflow = {
+		count: 2,
+		data: [
+			{
+				workflowId: 'w1',
+				workflowName: 'Test Workflow',
+				projectId: 'p1',
+				projectName: 'Test Project',
+				total: 100,
+				succeeded: 90,
+				failed: 10,
+				failureRate: 0.56,
+				runTime: 300,
+				averageRunTime: 30.5,
+				timeSaved: 50,
+			},
+		],
+	};
+
 	test.each([
 		{
 			name: 'valid workflow insights',
+			value: validInsightsByWorkflow,
+			expected: true,
+		},
+		{
+			name: 'workflow insights with nullable workflow id and project id',
 			value: {
-				count: 2,
+				...validInsightsByWorkflow,
 				data: [
 					{
-						workflowId: 'w1',
-						workflowName: 'Test Workflow',
-						projectId: 'p1',
-						projectName: 'Test Project',
-						total: 100,
-						succeeded: 90,
-						failed: 10,
-						failureRate: 0.56,
-						runTime: 300,
-						averageRunTime: 30.5,
-						timeSaved: 50,
+						...validInsightsByWorkflow.data[0],
+						workflowId: null,
+						projectId: null,
 					},
 				],
 			},

packages/@n8n/api-types/src/schemas/insights.schema.ts

@@ -48,9 +48,11 @@ export const insightsByWorkflowDataSchemas = {
 	data: z.array(
 		z
 			.object({
-				workflowId: z.string(),
+				// Workflow id will be null if the workflow has been deleted
+				workflowId: z.string().nullable(),
 				workflowName: z.string(),
-				projectId: z.string(),
+				// Project id will be null if the project has been deleted
+				projectId: z.string().nullable(),
 				projectName: z.string(),
 				total: z.number(),
 				succeeded: z.number(),