A/B 拆分测试
高级
这是一个Content Creation, Multimodal AI领域的自动化工作流，包含 16 个节点。主要使用 If, Set, Supabase, Agent, ChatTrigger 等节点。 使用Supabase、Langchain Agent和OpenAI GPT-4o进行AI提示A/B测试
前置要求
- •Supabase URL 和 API Key
- •OpenAI API Key
- •PostgreSQL 数据库连接信息
工作流预览
可视化展示节点连接关系，支持缩放和平移
导出工作流
复制以下 JSON 配置到 n8n 导入，即可使用此工作流
{
"id": "TEA7K9MSVQGCWKe6",
"meta": {
"instanceId": "ac63467607103d9c95dd644384984672b90b1cb03e07edbaf18fe72b2a6c45bb",
"templateCredsSetupCompleted": true
},
"name": "A/B 拆分测试",
"tags": [],
"nodes": [
{
"id": "e8404493-4297-4169-a72f-89e668ae5fbc",
"name": "当收到聊天消息时",
"type": "@n8n/n8n-nodes-langchain.chatTrigger",
"position": [
-1460,
-140
],
"webhookId": "334e3a8d-73d2-4d3c-9927-158c1169ef5e",
"parameters": {
"options": {}
},
"typeVersion": 1.1
},
{
"id": "582e1c1b-12ff-42ff-8130-48f94eebd706",
"name": "AI Agent",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
220,
-160
],
"parameters": {
"text": "={{ $('When chat message received').item.json.chatInput }}",
"options": {
"systemMessage": "={{ $json.prompt }}"
},
"promptType": "define"
},
"typeVersion": 1.7
},
{
"id": "39ca5c70-11d4-4f86-bde5-0f9827297be9",
"name": "检查会话是否存在",
"type": "n8n-nodes-base.supabase",
"position": [
-960,
-140
],
"parameters": {
"filters": {
"conditions": [
{
"keyName": "session_id",
"keyValue": "={{ $('When chat message received').item.json.sessionId }}"
}
]
},
"tableId": "split_test_sessions",
"operation": "get"
},
"credentials": {
"supabaseApi": {
"id": "1iEg1EzFrF29iqp2",
"name": "Supabase (bsde.ai)"
}
},
"executeOnce": false,
"typeVersion": 1,
"alwaysOutputData": true
},
{
"id": "35f2c270-9571-41ba-ab7c-47a6742d7d90",
"name": "如果会话存在",
"type": "n8n-nodes-base.if",
"position": [
-720,
-140
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "4270c464-6874-45d2-aa3b-606f45544c3d",
"operator": {
"type": "number",
"operation": "exists",
"singleValue": true
},
"leftValue": "={{ $json.id }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.2
},
{
"id": "ec00ad92-96e9-4936-a547-2a2715ff5c32",
"name": "为会话分配路径",
"type": "n8n-nodes-base.supabase",
"position": [
-400,
-20
],
"parameters": {
"tableId": "split_test_sessions",
"fieldsUi": {
"fieldValues": [
{
"fieldId": "show_alternative",
"fieldValue": "={{ Math.random() < 0.5 }}"
},
{
"fieldId": "session_id",
"fieldValue": "={{ $('When chat message received').item.json.sessionId }}"
}
]
}
},
"credentials": {
"supabaseApi": {
"id": "1iEg1EzFrF29iqp2",
"name": "Supabase (bsde.ai)"
}
},
"typeVersion": 1
},
{
"id": "92ee7145-30ae-41e9-bc04-eef03b84485e",
"name": "定义路径值",
"type": "n8n-nodes-base.set",
"position": [
-1200,
-140
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "9581a184-a120-4b1f-8408-cfe97520d107",
"name": "baseline_value",
"type": "string",
"value": "The dog's name is Ben"
},
{
"id": "1752f2c4-4ce4-4893-b8db-1c59131c298a",
"name": "alternative_value",
"type": "string",
"value": "The dog's name is Tom"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "23c1b4e2-2ba2-4237-bb4b-b92da127d201",
"name": "OpenAI 聊天模型",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
300,
60
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"id": "1OMpAMAKR9l3eUDI",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
},
{
"id": "be3f14b9-68c7-457d-b5bf-a6abbadf5b67",
"name": "Postgres 聊天记忆",
"type": "@n8n/n8n-nodes-langchain.memoryPostgresChat",
"position": [
480,
60
],
"parameters": {
"tableName": "n8n_split_test_chat_histories",
"sessionKey": "={{ $('When chat message received').item.json.sessionId }}",
"sessionIdType": "customKey"
},
"credentials": {
"postgres": {
"id": "tzLXHvhykxvYghPC",
"name": "bsde.ai Supabase (Session Pooler)"
}
},
"typeVersion": 1.3
},
{
"id": "1c20d274-2482-4551-a4ea-64860eb35276",
"name": "便签 1",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1520,
-260
],
"parameters": {
"color": 7,
"width": 220,
"height": 300,
"content": "## 1. 接收消息"
},
"typeVersion": 1
},
{
"id": "ee22d3b1-d447-4e35-8ac4-d093edf6deee",
"name": "便签",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1280,
-340
],
"parameters": {
"color": 7,
"width": 1340,
"height": 500,
"content": "## 2. 确定 LLM 提示词"
},
"typeVersion": 1
},
{
"id": "7d90ec00-5fca-4b0d-bc1f-e8b8c179b960",
"name": "便签 2",
"type": "n8n-nodes-base.stickyNote",
"position": [
80,
-240
],
"parameters": {
"color": 7,
"width": 520,
"height": 440,
"content": "## 3. AI Agent"
},
"typeVersion": 1
},
{
"id": "b9b9e0e8-53c1-4d6a-bbdc-c2a13d740dfb",
"name": "获取正确提示词",
"type": "n8n-nodes-base.set",
"position": [
-80,
-160
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "08de68ec-0f12-43ee-98ab-59d8a414f114",
"name": "prompt",
"type": "string",
"value": "={{ $json.show_alternative ? $('Define Path Values').item.json.alternative_value : $('Define Path Values').item.json.baseline_value }}"
}
]
}
},
"typeVersion": 3.4
},
{
"id": "2b78ce9b-e6b4-4744-8ddf-00f8ae990fc8",
"name": "便签6",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1260,
-240
],
"parameters": {
"color": 5,
"width": 220,
"height": 260,
"content": "### 修改"
},
"typeVersion": 1
},
{
"id": "0646f176-407a-41ee-b602-34bd681fc421",
"name": "便签8",
"type": "n8n-nodes-base.stickyNote",
"position": [
100,
40
],
"parameters": {
"color": 5,
"width": 340,
"height": 140,
"content": "### 修改"
},
"typeVersion": 1
},
{
"id": "a391018c-5d28-4384-89e1-0435758a6945",
"name": "便签 5",
"type": "n8n-nodes-base.stickyNote",
"position": [
-1480,
-600
],
"parameters": {
"width": 520,
"height": 240,
"content": "### 设置"
},
"typeVersion": 1
},
{
"id": "2382d146-f0c1-4de6-9e90-b17c304df692",
"name": "便签 3",
"type": "n8n-nodes-base.stickyNote",
"position": [
-2120,
-360
],
"parameters": {
"width": 560,
"height": 480,
"content": ""
},
"typeVersion": 1
}
],
"active": false,
"pinData": {},
"settings": {
"executionOrder": "v1"
},
"versionId": "339c6f2f-e4d1-4922-9442-2c1a78e96067",
"connections": {
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Define Path Values": {
"main": [
[
{
"node": "Check If Session Exists",
"type": "main",
"index": 0
}
]
]
},
"Get Correct Prompt": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Postgres Chat Memory": {
"ai_memory": [
[
{
"node": "AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"If Session Does Exist": {
"main": [
[
{
"node": "Get Correct Prompt",
"type": "main",
"index": 0
}
],
[
{
"node": "Assign Path To Session",
"type": "main",
"index": 0
}
]
]
},
"Assign Path To Session": {
"main": [
[
{
"node": "Get Correct Prompt",
"type": "main",
"index": 0
}
]
]
},
"Check If Session Exists": {
"main": [
[
{
"node": "If Session Does Exist",
"type": "main",
"index": 0
}
]
]
},
"When chat message received": {
"main": [
[
{
"node": "Define Path Values",
"type": "main",
"index": 0
}
]
]
}
}
}常见问题
如何使用这个工作流？
复制上方的 JSON 配置代码，在您的 n8n 实例中创建新工作流并选择「从 JSON 导入」，粘贴配置后根据需要修改凭证设置即可。
这个工作流适合什么场景？
高级 - 内容创作, 多模态 AI
需要付费吗？
本工作流完全免费，您可以直接导入使用。但请注意，工作流中使用的第三方服务（如 OpenAI API）可能需要您自行付费。
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