From 49872fbbac7efb282f5768e532f8eed3e9e98a0f Mon Sep 17 00:00:00 2001
From: Alex Grozav <alex@grozav.com>
Date: Fri, 21 Mar 2025 09:24:05 +0200
Subject: [PATCH] fix: Replace ai nodes enum strings with hard-coded values
 (no-changelog) (#14091)

---
 .../nodes/agents/Agent/Agent.node.ts           | 18 ++++++++----------
 .../nodes/chains/ChainLLM/methods/config.ts    |  6 +++---
 .../V2/ChainSummarizationV2.node.ts            |  8 ++++----
 3 files changed, 15 insertions(+), 17 deletions(-)

diff --git a/packages/@n8n/nodes-langchain/nodes/agents/Agent/Agent.node.ts b/packages/@n8n/nodes-langchain/nodes/agents/Agent/Agent.node.ts
index fbb48d07d7..f531d3ebad 100644
--- a/packages/@n8n/nodes-langchain/nodes/agents/Agent/Agent.node.ts
+++ b/packages/@n8n/nodes-langchain/nodes/agents/Agent/Agent.node.ts
@@ -46,14 +46,14 @@ function getInputs(
 		inputs: SpecialInput[],
 	): Array<NodeConnectionType | INodeInputConfiguration> => {
 		const displayNames: { [key: string]: string } = {
-			[NodeConnectionType.AiLanguageModel]: 'Model',
-			[NodeConnectionType.AiMemory]: 'Memory',
-			[NodeConnectionType.AiTool]: 'Tool',
-			[NodeConnectionType.AiOutputParser]: 'Output Parser',
+			ai_languageModel: 'Model',
+			ai_memory: 'Memory',
+			ai_tool: 'Tool',
+			ai_outputParser: 'Output Parser',
 		};
 
 		return inputs.map(({ type, filter }) => {
-			const isModelType = type === NodeConnectionType.AiLanguageModel;
+			const isModelType = type === ('ai_languageModel' as NodeConnectionType);
 			let displayName = type in displayNames ? displayNames[type] : undefined;
 			if (
 				isModelType &&
@@ -65,11 +65,9 @@ function getInputs(
 				type,
 				displayName,
 				required: isModelType,
-				maxConnections: [
-					NodeConnectionType.AiLanguageModel,
-					NodeConnectionType.AiMemory,
-					NodeConnectionType.AiOutputParser,
-				].includes(type as NodeConnectionType)
+				maxConnections: ['ai_languageModel', 'ai_memory', 'ai_outputParser'].includes(
+					type as NodeConnectionType,
+				)
 					? 1
 					: undefined,
 			};
diff --git a/packages/@n8n/nodes-langchain/nodes/chains/ChainLLM/methods/config.ts b/packages/@n8n/nodes-langchain/nodes/chains/ChainLLM/methods/config.ts
index 973034714f..15686918be 100644
--- a/packages/@n8n/nodes-langchain/nodes/chains/ChainLLM/methods/config.ts
+++ b/packages/@n8n/nodes-langchain/nodes/chains/ChainLLM/methods/config.ts
@@ -14,11 +14,11 @@ import { getTemplateNoticeField } from '@utils/sharedFields';
  */
 export function getInputs(parameters: IDataObject) {
 	const inputs = [
-		{ displayName: '', type: NodeConnectionType.Main },
+		{ displayName: '', type: 'main' },
 		{
 			displayName: 'Model',
 			maxConnections: 1,
-			type: NodeConnectionType.AiLanguageModel,
+			type: 'ai_languageModel',
 			required: true,
 		},
 	];
@@ -29,7 +29,7 @@ export function getInputs(parameters: IDataObject) {
 	if (hasOutputParser === undefined || hasOutputParser === true) {
 		inputs.push({
 			displayName: 'Output Parser',
-			type: NodeConnectionType.AiOutputParser,
+			type: 'ai_outputParser',
 			maxConnections: 1,
 			required: false,
 		});
diff --git a/packages/@n8n/nodes-langchain/nodes/chains/ChainSummarization/V2/ChainSummarizationV2.node.ts b/packages/@n8n/nodes-langchain/nodes/chains/ChainSummarization/V2/ChainSummarizationV2.node.ts
index 4e17adb18d..fa074edc3b 100644
--- a/packages/@n8n/nodes-langchain/nodes/chains/ChainSummarization/V2/ChainSummarizationV2.node.ts
+++ b/packages/@n8n/nodes-langchain/nodes/chains/ChainSummarization/V2/ChainSummarizationV2.node.ts
@@ -25,11 +25,11 @@ function getInputs(parameters: IDataObject) {
 	const chunkingMode = parameters?.chunkingMode;
 	const operationMode = parameters?.operationMode;
 	const inputs = [
-		{ displayName: '', type: NodeConnectionType.Main },
+		{ displayName: '', type: 'main' },
 		{
 			displayName: 'Model',
 			maxConnections: 1,
-			type: NodeConnectionType.AiLanguageModel,
+			type: 'ai_languageModel',
 			required: true,
 		},
 	];
@@ -37,7 +37,7 @@ function getInputs(parameters: IDataObject) {
 	if (operationMode === 'documentLoader') {
 		inputs.push({
 			displayName: 'Document',
-			type: NodeConnectionType.AiDocument,
+			type: 'ai_document',
 			required: true,
 			maxConnections: 1,
 		});
@@ -47,7 +47,7 @@ function getInputs(parameters: IDataObject) {
 	if (chunkingMode === 'advanced') {
 		inputs.push({
 			displayName: 'Text Splitter',
-			type: NodeConnectionType.AiTextSplitter,
+			type: 'ai_textSplitter',
 			required: false,
 			maxConnections: 1,
 		});