✨ Add "Execute Once" node-setting

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

@@ -25,7 +25,7 @@
 						The node does not have any parameters.
 					</div>
 				</el-tab-pane>
-				<el-tab-pane label="Node">
+				<el-tab-pane label="Settings">
 					<parameter-input-list :parameters="nodeSettings" :hideDelete="true" :nodeValues="nodeValues" path="" @valueChanged="valueChanged" />
 					<parameter-input-list :parameters="parametersSetting" :nodeValues="nodeValues" path="parameters" @valueChanged="valueChanged" />
 				</el-tab-pane>
@@ -142,6 +142,7 @@ export default mixins(
 				nodeValues: {
 					color: '#ff0000',
 					alwaysOutputData: false,
+					executeOnce: false,
 					notesInFlow: false,
 					continueOnFail: false,
 					retryOnFail: false,
@@ -187,6 +188,14 @@ export default mixins(
 						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: 'Execute Once',
+						name: 'executeOnce',
+						type: 'boolean',
+						default: false,
+						noDataExpression: true,
+						description: 'Instead of executing once per item does it only execute once with the data of the first item.',
+					},
 					{
 						displayName: 'Retry On Fail',
 						name: 'retryOnFail',
@@ -442,6 +451,11 @@ export default mixins(
 						Vue.set(this.nodeValues, 'alwaysOutputData', this.node.alwaysOutputData);
 					}
 
+					if (this.node.executeOnce) {
+						foundNodeSettings.push('executeOnce');
+						Vue.set(this.nodeValues, 'executeOnce', this.node.executeOnce);
+					}
+
 					if (this.node.continueOnFail) {
 						foundNodeSettings.push('continueOnFail');
 						Vue.set(this.nodeValues, 'continueOnFail', this.node.continueOnFail);

packages/workflow/src/Interfaces.ts

@@ -337,6 +337,7 @@ export interface INode {
 	maxTries?: number;
 	waitBetweenTries?: number;
 	alwaysOutputData?: boolean;
+	executeOnce?: boolean;
 	continueOnFail?: boolean;
 	parameters: INodeParameters;
 	credentials?: INodeCredentials;

packages/workflow/src/Workflow.ts

@@ -1128,6 +1128,18 @@ export class Workflow {
 			throw error;
 		}
 
+		if (node.executeOnce === true) {
+			// If node should be executed only use only the first input item
+			connectionInputData = connectionInputData.slice(0, 1);
+			const newInputData: ITaskDataConnections = {};
+			for (const inputName of Object.keys(inputData)) {
+				newInputData[inputName] = inputData[inputName].map(input => {
+					return input && input.slice(0, 1);
+				});
+			}
+			inputData = newInputData;
+		}
+
 		if (nodeType.executeSingle) {
 			const returnPromises: Array<Promise<INodeExecutionData>> = [];