✨ Add "alwaysOutputData" option to nodes

packages/core/src/WorkflowExecute.ts

@@ -596,6 +596,17 @@ export class WorkflowExecute {
 							this.runExecutionData.resultData.lastNodeExecuted = executionData.node.name;
 							nodeSuccessData = await workflow.runNode(executionData.node, executionData.data, this.runExecutionData, runIndex, this.additionalData, NodeExecuteFunctions, this.mode);
 
+							if (nodeSuccessData === null || nodeSuccessData[0][0] === undefined) {
+								if (executionData.node.alwaysOutputData === true) {
+									nodeSuccessData = nodeSuccessData || [];
+									nodeSuccessData[0] = [
+										{
+											json: {},
+										}
+									];
+								}
+							}
+
 							if (nodeSuccessData === null) {
 								// If null gets returned it means that the node did succeed
 								// but did not have any data. So the branch should end

packages/editor-ui/src/components/NodeSettings.vue

@@ -141,6 +141,7 @@ export default mixins(
 				nodeColor: null,
 				nodeValues: {
 					color: '#ff0000',
+					alwaysOutputData: false,
 					continueOnFail: false,
 					retryOnFail: false,
 					maxTries: 3,
@@ -169,6 +170,14 @@ export default mixins(
 						noDataExpression: true,
 						description: 'The color of the node in the flow.',
 					},
+					{
+						displayName: 'Always Output Data',
+						name: 'alwaysOutputData',
+						type: 'boolean',
+						default: false,
+						noDataExpression: true,
+						description: 'If activated and the node does not have any data for the first output,<br />it returns an empty item anyway. Be careful setting this on<br />IF-Nodes as it could easily cause an infinite loop.',
+					},
 					{
 						displayName: 'Retry On Fail',
 						name: 'retryOnFail',
@@ -419,6 +428,11 @@ export default mixins(
 						Vue.set(this.nodeValues, 'notes', this.node.notes);
 					}
 
+					if (this.node.alwaysOutputData) {
+						foundNodeSettings.push('alwaysOutputData');
+						Vue.set(this.nodeValues, 'alwaysOutputData', this.node.alwaysOutputData);
+					}
+
 					if (this.node.continueOnFail) {
 						foundNodeSettings.push('continueOnFail');
 						Vue.set(this.nodeValues, 'continueOnFail', this.node.continueOnFail);

packages/workflow/src/Interfaces.ts

@@ -292,6 +292,7 @@ export interface INode {
 	retryOnFail?: boolean;
 	maxTries?: number;
 	waitBetweenTries?: number;
+	alwaysOutputData?: boolean;
 	continueOnFail?: boolean;
 	parameters: INodeParameters;
 	credentials?: INodeCredentials;