feat(core): Node hints improvements (no-changelog) (#9387)

Co-authored-by: Giulio Andreini <andreini@netseven.it>

packages/design-system/src/css/_tokens.scss

@@ -225,8 +225,8 @@
 	// Callout
 	--color-callout-info-border: var(--color-foreground-base);
 	--color-callout-info-background: var(--color-foreground-xlight);
-	--color-callout-info-font: var(--color-info);
-	--color-callout-info-icon: var(--color-info);
+	--color-callout-info-font: var(--color-text-base);
+	--color-callout-info-icon: var(--color-text-light);
 	--color-callout-success-border: var(--color-success-light-2);
 	--color-callout-success-background: var(--color-success-tint-2);
 	--color-callout-success-font: var(--color-success);

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

@@ -1021,6 +1021,24 @@ export default defineComponent({
 		showIoSearchNoMatchContent(): boolean {
 			return this.hasNodeRun && !this.inputData.length && !!this.search;
 		},
+		parentNodeOutputData(): INodeExecutionData[] {
+			const workflow = this.workflowsStore.getCurrentWorkflow();
+
+			const parentNode = workflow.getParentNodesByDepth(this.node.name)[0];
+			let parentNodeData: INodeExecutionData[] = [];
+
+			if (parentNode?.name) {
+				parentNodeData = this.nodeHelpers.getNodeInputData(
+					workflow.getNode(parentNode?.name),
+					this.runIndex,
+					this.outputIndex,
+					'input',
+					this.connectionType,
+				);
+			}
+
+			return parentNodeData;
+		},
 	},
 	watch: {
 		node(newNode: INodeUi, prevNode: INodeUi) {
@@ -1118,19 +1136,18 @@ export default defineComponent({
 		},
 		shouldHintBeDisplayed(hint: NodeHint): boolean {
 			const { location, whenToDisplay } = hint;
+
 			if (location) {
-				if (location === 'ndv') {
-					return true;
+				if (location === 'ndv' && !['input', 'output'].includes(this.paneType)) {
+					return false;
 				}
-				if (location === 'inputPane' && this.paneType === 'input') {
-					return true;
+				if (location === 'inputPane' && this.paneType !== 'input') {
+					return false;
 				}
 
-				if (location === 'outputPane' && this.paneType === 'output') {
-					return true;
+				if (location === 'outputPane' && this.paneType !== 'output') {
+					return false;
 				}
-
-				return false;
 			}
 
 			if (whenToDisplay === 'afterExecution' && !this.hasNodeRun) {
@@ -1150,7 +1167,12 @@ export default defineComponent({
 
 				if (workflowNode) {
 					const executionHints = this.executionHints;
-					const nodeHints = NodeHelpers.getNodeHints(workflow, workflowNode, this.nodeType);
+					const nodeHints = NodeHelpers.getNodeHints(workflow, workflowNode, this.nodeType, {
+						runExecutionData: this.workflowExecution?.data ?? null,
+						runIndex: this.runIndex,
+						connectionInputData: this.parentNodeOutputData,
+					});
+
 					return executionHints.concat(nodeHints).filter(this.shouldHintBeDisplayed);
 				}
 			}

packages/nodes-base/nodes/Postgres/v2/actions/router.ts

@@ -1,5 +1,5 @@
 import type { IExecuteFunctions, INodeExecutionData } from 'n8n-workflow';
-import { NodeOperationError } from 'n8n-workflow';
+import { NodeExecutionOutput, NodeOperationError } from 'n8n-workflow';
 
 import { configurePostgres } from '../transport';
 import { configureQueryRunner } from '../helpers/utils';
@@ -17,7 +17,8 @@ export async function router(this: IExecuteFunctions): Promise<INodeExecutionDat
 
 	const credentials = (await this.getCredentials('postgres')) as PostgresNodeCredentials;
 	const options = this.getNodeParameter('options', 0, {}) as PostgresNodeOptions;
-	options.nodeVersion = this.getNode().typeVersion;
+	const node = this.getNode();
+	options.nodeVersion = node.typeVersion;
 	options.operation = operation;
 
 	const { db, pgp, sshClient } = await configurePostgres(credentials, options);
@@ -62,5 +63,17 @@ export async function router(this: IExecuteFunctions): Promise<INodeExecutionDat
 		if (!db.$pool.ending) await db.$pool.end();
 	}
 
+	if (operation === 'select' && items.length > 1 && !node.executeOnce) {
+		return new NodeExecutionOutput(
+			[returnData],
+			[
+				{
+					message: `This node ran ${items.length} times, once for each input item. To run for the first item only, enable 'execute once' in the node settings`,
+					location: 'outputPane',
+				},
+			],
+		);
+	}
+
 	return [returnData];
 }

packages/nodes-base/nodes/Transform/SplitOut/SplitOut.node.ts

@@ -1,14 +1,14 @@
 import get from 'lodash/get';
 import unset from 'lodash/unset';
-import {
-	type IBinaryData,
-	NodeOperationError,
-	deepCopy,
-	type IDataObject,
-	type IExecuteFunctions,
-	type INodeExecutionData,
-	type INodeType,
-	type INodeTypeDescription,
+import { NodeOperationError, deepCopy, NodeExecutionOutput } from 'n8n-workflow';
+import type {
+	IBinaryData,
+	IDataObject,
+	IExecuteFunctions,
+	INodeExecutionData,
+	INodeType,
+	INodeTypeDescription,
+	NodeExecutionHint,
 } from 'n8n-workflow';
 import { prepareFieldsArray } from '../utils/utils';
 
@@ -111,6 +111,7 @@ export class SplitOut implements INodeType {
 	async execute(this: IExecuteFunctions): Promise<INodeExecutionData[][]> {
 		const returnData: INodeExecutionData[] = [];
 		const items = this.getInputData();
+		const notFoundedFields: { [key: string]: boolean[] } = {};
 
 		for (let i = 0; i < items.length; i++) {
 			const fieldsToSplitOut = (this.getNodeParameter('fieldToSplitOut', i) as string)
@@ -160,6 +161,14 @@ export class SplitOut implements INodeType {
 
 					if (entityToSplit === undefined) {
 						entityToSplit = [];
+						if (!notFoundedFields[fieldToSplitOut]) {
+							notFoundedFields[fieldToSplitOut] = [];
+						}
+						notFoundedFields[fieldToSplitOut].push(false);
+					} else {
+						if (notFoundedFields[fieldToSplitOut]) {
+							notFoundedFields[fieldToSplitOut].push(true);
+						}
 					}
 
 					if (typeof entityToSplit !== 'object' || entityToSplit === null) {
@@ -254,6 +263,21 @@ export class SplitOut implements INodeType {
 			}
 		}
 
+		if (Object.keys(notFoundedFields).length) {
+			const hints: NodeExecutionHint[] = [];
+
+			for (const [field, values] of Object.entries(notFoundedFields)) {
+				if (values.every((value) => !value)) {
+					hints.push({
+						message: `The field '${field}' wasn't found in any input item`,
+						location: 'outputPane',
+					});
+				}
+			}
+
+			if (hints.length) return new NodeExecutionOutput([returnData], hints);
+		}
+
 		return [returnData];
 	}
 }

packages/workflow/src/NodeHelpers.ts

@@ -43,6 +43,7 @@ import type {
 	GenericValue,
 	DisplayCondition,
 	NodeHint,
+	INodeExecutionData,
 } from './Interfaces';
 import {
 	isFilterValue,
@@ -1125,6 +1126,11 @@ export function getNodeHints(
 	workflow: Workflow,
 	node: INode,
 	nodeTypeData: INodeTypeDescription,
+	nodeInputData?: {
+		runExecutionData: IRunExecutionData | null;
+		runIndex: number;
+		connectionInputData: INodeExecutionData[];
+	},
 ): NodeHint[] {
 	const hints: NodeHint[] = [];
 
@@ -1132,12 +1138,32 @@ export function getNodeHints(
 		for (const hint of nodeTypeData.hints) {
 			if (hint.displayCondition) {
 				try {
-					const display = (workflow.expression.getSimpleParameterValue(
-						node,
-						hint.displayCondition,
-						'internal',
-						{},
-					) || false) as boolean;
+					let display;
+
+					if (nodeInputData === undefined) {
+						display = (workflow.expression.getSimpleParameterValue(
+							node,
+							hint.displayCondition,
+							'internal',
+							{},
+						) || false) as boolean;
+					} else {
+						const { runExecutionData, runIndex, connectionInputData } = nodeInputData;
+						display = workflow.expression.getParameterValue(
+							hint.displayCondition,
+							runExecutionData ?? null,
+							runIndex,
+							0,
+							node.name,
+							connectionInputData,
+							'manual',
+							{},
+						);
+					}
+
+					if (typeof display === 'string' && display.trim() === 'true') {
+						display = true;
+					}
 
 					if (typeof display !== 'boolean') {
 						console.warn(