{
"id": "q2MJWAqpKF2BCJkq",
"meta": {
"instanceId": "021d3c82ba2d3bc090cbf4fc81c9312668bcc34297e022bb3438c5c88a43a5ff"
},
"name": "LangChain - Example - Code Node Example",
"tags": [
{
"id": "snf16n0p2UrGP838",
"name": "LangChain - Example",
"createdAt": "2023-09-25T16:21:55.962Z",
"updatedAt": "2023-09-25T16:21:55.962Z"
}
],
"nodes": [
{
"id": "ad1a920e-1048-4b58-9c4a-a0469a1f189d",
"name": "OpenAI",
"type": "@n8n/n8n-nodes-langchain.lmOpenAi",
"position": [
900,
628
],
"parameters": {
"options": {}
},
"credentials": {
"openAiApi": {
"id": "4jRB4A20cPycBqP5",
"name": "OpenAI account - n8n"
}
},
"typeVersion": 1
},
{
"id": "7dd04ecd-f169-455c-9c90-140140e37542",
"name": "Sticky Note",
"type": "n8n-nodes-base.stickyNote",
"position": [
800,
340
],
"parameters": {
"width": 432,
"height": 237,
"content": "## Self-coded LLM Chain Node"
},
"typeVersion": 1
},
{
"id": "05ad7d68-5dc8-42f2-8274-fcb5bdeb68cb",
"name": "When clicking \"Execute Workflow\"",
"type": "n8n-nodes-base.manualTrigger",
"position": [
280,
428
],
"parameters": {},
"typeVersion": 1
},
{
"id": "39e2fd34-3261-44a1-aa55-96f169d55aad",
"name": "Set",
"type": "n8n-nodes-base.set",
"position": [
620,
428
],
"parameters": {
"values": {
"string": [
{
"name": "input",
"value": "Tell me a joke"
}
]
},
"options": {}
},
"typeVersion": 2
},
{
"id": "42a3184c-0c62-4e79-9220-7a93e313317e",
"name": "Set1",
"type": "n8n-nodes-base.set",
"position": [
620,
820
],
"parameters": {
"values": {
"string": [
{
"name": "input",
"value": "What year was Einstein born?"
}
]
},
"options": {}
},
"typeVersion": 2
},
{
"id": "4e2af29d-7fc4-484b-8028-1b9a84d60172",
"name": "Chat OpenAI",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
731,
1108
],
"parameters": {
"options": {}
},
"credentials": {
"openAiApi": {
"id": "4jRB4A20cPycBqP5",
"name": "OpenAI account - n8n"
}
},
"typeVersion": 1
},
{
"id": "334e9176-3a18-4838-84cb-70e8154f1a30",
"name": "Sticky Note1",
"type": "n8n-nodes-base.stickyNote",
"position": [
880,
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],
"parameters": {
"width": 320.2172923777021,
"height": 231,
"content": "## Self-coded Tool Node"
},
"typeVersion": 1
},
{
"id": "05e0d5c6-df18-42ba-99b6-a2b65633a14d",
"name": "Custom - Wikipedia",
"type": "@n8n/n8n-nodes-langchain.code",
"position": [
971,
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],
"parameters": {
"code": {
"supplyData": {
"code": "console.log('Custom Wikipedia Node runs');\nconst { WikipediaQueryRun } = require('langchain/tools');\nreturn new WikipediaQueryRun();"
}
},
"outputs": {
"output": [
{
"type": "ai_tool"
}
]
}
},
"typeVersion": 1
},
{
"id": "9c729e9a-f173-430c-8bcd-74101b614891",
"name": "Custom - LLM Chain Node",
"type": "@n8n/n8n-nodes-langchain.code",
"position": [
880,
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],
"parameters": {
"code": {
"execute": {
"code": "const { PromptTemplate } = require('langchain/prompts');\n\nconst query = $input.item.json.input;\nconst prompt = PromptTemplate.fromTemplate(query);\nconst llm = await this.getInputConnectionData('ai_languageModel', 0);\nlet chain = prompt.pipe(llm);\nconst output = await chain.invoke();\nreturn [ {json: { output } } ];"
}
},
"inputs": {
"input": [
{
"type": "main"
},
{
"type": "ai_languageModel",
"required": true,
"maxConnections": 1
}
]
},
"outputs": {
"output": [
{
"type": "main"
}
]
}
},
"typeVersion": 1
},
{
"id": "6427bbf0-49a6-4810-9744-87d88151e914",
"name": "Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
880,
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],
"parameters": {
"options": {}
},
"typeVersion": 1
}
],
"active": false,
"pinData": {},
"settings": {
"executionOrder": "v1"
},
"versionId": "e14a709d-08fe-4ed7-903a-fb2bae80b28a",
"connections": {
"Set": {
"main": [
[
{
"node": "Custom - LLM Chain Node",
"type": "main",
"index": 0
}
]
]
},
"Set1": {
"main": [
[
{
"node": "Agent",
"type": "main",
"index": 0
}
]
]
},
"OpenAI": {
"ai_languageModel": [
[
{
"node": "Custom - LLM Chain Node",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Chat OpenAI": {
"ai_languageModel": [
[
{
"node": "Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Custom - Wikipedia": {
"ai_tool": [
[
{
"node": "Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"When clicking \"Execute Workflow\"": {
"main": [
[
{
"node": "Set",
"type": "main",
"index": 0
},
{
"node": "Set1",
"type": "main",
"index": 0
}
]
]
}
}
}