使用 OpenAI、LangChain 和 API 集成的工作流自动化初学者指南
高级
这是一个Content Creation, Multimodal AI领域的自动化工作流，包含 33 个节点。主要使用 If, Set, Code, Merge, Webhook 等节点。 使用 OpenAI、LangChain 和 API 集成的工作流自动化初学者指南
前置要求
- •HTTP Webhook 端点（n8n 会自动生成）
- •可能需要目标 API 的认证凭证
- •OpenAI API Key
使用的节点 (33)
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
{
"meta": {
"instanceId": "cfcdd4aa7acb600106c0a4bff4e6959e8e3b32b3b8cbc7d93531b2a4c9012a32"
},
"nodes": [
{
"id": "0a919d77-d00e-46a4-9dd4-c89f16cb5467",
"name": "从此开始 - 手动触发器",
"type": "n8n-nodes-base.manualTrigger",
"position": [
-400,
288
],
"parameters": {},
"typeVersion": 1
},
{
"id": "af159130-a22f-4a30-a426-3c3dece6777b",
"name": "欢迎说明",
"type": "n8n-nodes-base.stickyNote",
"position": [
-528,
-128
],
"parameters": {
"color": 4,
"width": 348,
"height": 596,
"content": "## 欢迎使用 n8n！"
},
"typeVersion": 1
},
{
"id": "7e354aac-bf00-4137-b6a2-fb96971b27a9",
"name": "设置初始数据",
"type": "n8n-nodes-base.set",
"position": [
-48,
288
],
"parameters": {
"options": {}
},
"typeVersion": 3.3
},
{
"id": "597d33d2-acf4-4f37-8d9b-b91b8e632500",
"name": "关于设置节点",
"type": "n8n-nodes-base.stickyNote",
"position": [
-160,
-128
],
"parameters": {
"color": 5,
"width": 340,
"height": 592,
"content": "## 设置节点"
},
"typeVersion": 1
},
{
"id": "6ed38d45-da78-4c65-80c3-31622b13df7a",
"name": "代码节点 - 自定义处理",
"type": "n8n-nodes-base.code",
"position": [
320,
288
],
"parameters": {
"jsCode": "// Code Node - Write custom JavaScript\n\n// Access all input items\nconst items = $input.all();\n\n// Process each item\nconst results = items.map((item, index) => {\n const data = item.json;\n \n return {\n json: {\n // Keep original data\n ...data,\n // Add new calculated fields\n doubled_number: data.sample_number * 2,\n message_length: data.message.length,\n processed_at: new Date().toISOString(),\n item_index: index,\n // Example of string manipulation\n uppercase_message: data.message.toUpperCase(),\n // Example array\n tags: ['beginner', 'tutorial', 'n8n']\n }\n };\n});\n\nreturn results;"
},
"typeVersion": 2
},
{
"id": "1721a18e-125b-4b05-a49a-61751809244d",
"name": "关于代码节点",
"type": "n8n-nodes-base.stickyNote",
"position": [
192,
-176
],
"parameters": {
"color": 5,
"width": 340,
"height": 648,
"content": "## 代码节点"
},
"typeVersion": 1
},
{
"id": "b1b6de48-2d84-4133-a9ca-c40efd8d40cb",
"name": "IF 条件 - 路由数据",
"type": "n8n-nodes-base.if",
"position": [
688,
288
],
"parameters": {
"options": {},
"conditions": {
"options": {
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "condition-001",
"operator": {
"type": "number",
"operation": "smaller"
},
"leftValue": "={{ $json.sample_number }}",
"rightValue": 50
}
]
}
},
"typeVersion": 2
},
{
"id": "dd24f45a-9770-49ee-bf1d-dafce878acb1",
"name": "关于 IF 节点",
"type": "n8n-nodes-base.stickyNote",
"position": [
560,
-160
],
"parameters": {
"color": 5,
"width": 340,
"height": 636,
"content": "## IF 节点"
},
"typeVersion": 1
},
{
"id": "982434c7-64a0-46b3-a3d0-ce388c5a3447",
"name": "真分支数据",
"type": "n8n-nodes-base.set",
"position": [
976,
128
],
"parameters": {
"options": {}
},
"typeVersion": 3.3
},
{
"id": "d418f9a5-197b-4754-a242-e41130fdfd37",
"name": "假分支数据",
"type": "n8n-nodes-base.set",
"position": [
976,
320
],
"parameters": {
"options": {}
},
"typeVersion": 3.3
},
{
"id": "35c673ad-958d-45fd-bf70-a659862ad007",
"name": "合并两个分支",
"type": "n8n-nodes-base.merge",
"position": [
1280,
224
],
"parameters": {
"mode": "combine",
"options": {}
},
"typeVersion": 3
},
{
"id": "a8fa8326-b655-4f81-81b5-6188ac70213b",
"name": "关于合并节点",
"type": "n8n-nodes-base.stickyNote",
"position": [
1152,
-160
],
"parameters": {
"color": 5,
"width": 340,
"height": 540,
"content": "## 合并节点"
},
"typeVersion": 1
},
{
"id": "e68f97f4-e769-4e19-b005-81afe32e19bd",
"name": "HTTP 请求 - 获取用户",
"type": "n8n-nodes-base.httpRequest",
"position": [
-16,
944
],
"parameters": {
"url": "https://jsonplaceholder.typicode.com/users",
"options": {}
},
"typeVersion": 4.2
},
{
"id": "aec22fa9-c3b0-493f-9e7d-18396bbc89e7",
"name": "关于 HTTP 请求",
"type": "n8n-nodes-base.stickyNote",
"position": [
-144,
480
],
"parameters": {
"color": 6,
"width": 360,
"height": 656,
"content": "## HTTP 请求节点"
},
"typeVersion": 1
},
{
"id": "2a386f39-b829-4fa6-9feb-a3514cdce8e0",
"name": "拆分用户数组",
"type": "n8n-nodes-base.splitOut",
"position": [
320,
944
],
"parameters": {
"options": {},
"fieldToSplitOut": "data"
},
"typeVersion": 1
},
{
"id": "b7224087-b8e0-4aa3-ac02-420d8cf48e85",
"name": "关于拆分输出",
"type": "n8n-nodes-base.stickyNote",
"position": [
224,
480
],
"parameters": {
"color": 6,
"width": 308,
"height": 648,
"content": "## 拆分输出节点"
},
"typeVersion": 1
},
{
"id": "ae144427-e63f-47d6-9e3a-a01fff3eba3f",
"name": "提取用户字段",
"type": "n8n-nodes-base.set",
"position": [
576,
944
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "assignment-001",
"name": "user_name",
"type": "string",
"value": "={{ $json.name }}"
},
{
"id": "assignment-002",
"name": "user_email",
"type": "string",
"value": "={{ $json.email }}"
},
{
"id": "assignment-003",
"name": "company",
"type": "string",
"value": "={{ $json.company.name }}"
}
]
}
},
"typeVersion": 3.3
},
{
"id": "9a02665d-32f7-41d3-8961-584d39a24fde",
"name": "OpenAI API - 生成趣味事实",
"type": "n8n-nodes-base.httpRequest",
"position": [
864,
944
],
"parameters": {
"url": "https://api.openai.com/v1/chat/completions",
"options": {},
"sendBody": true,
"sendHeaders": true,
"authentication": "predefinedCredentialType",
"bodyParameters": {
"parameters": [
{
"name": "model",
"value": "gpt-4o-mini"
},
{
"name": "messages",
"value": "=[{\"role\": \"user\", \"content\": \"Generate a fun fact about {{ $json.user_name }}'s company: {{ $json.company }}\"}]"
},
{
"name": "temperature",
"value": "0.7"
},
{
"name": "max_tokens",
"value": "100"
}
]
},
"headerParameters": {
"parameters": [
{
"name": "Content-Type",
"value": "application/json"
}
]
},
"nodeCredentialType": "openAiApi"
},
"typeVersion": 4.2
},
{
"id": "f06c7f4c-8577-472d-bdd2-ffea5d6f4abf",
"name": "关于 OpenAI",
"type": "n8n-nodes-base.stickyNote",
"position": [
736,
480
],
"parameters": {
"color": 6,
"width": 360,
"height": 652,
"content": "## OpenAI 集成"
},
"typeVersion": 1
},
{
"id": "27523b11-3a92-4b5f-b457-811ee30e188f",
"name": "Webhook - 接收数据",
"type": "n8n-nodes-base.webhook",
"position": [
1344,
944
],
"webhookId": "88d6f248-451b-477a-b754-1b9ce326e67c",
"parameters": {
"path": "beginner-webhook",
"options": {},
"httpMethod": "POST",
"responseMode": "responseNode"
},
"typeVersion": 2
},
{
"id": "40cee779-e780-4766-a057-3457c27dc1ea",
"name": "关于 Webhooks",
"type": "n8n-nodes-base.stickyNote",
"position": [
1264,
480
],
"parameters": {
"color": 7,
"width": 492,
"height": 660,
"content": "## Webhook 节点"
},
"typeVersion": 1
},
{
"id": "5d91498e-32e9-4f9e-89aa-3d4a079f1109",
"name": "发送 Webhook 响应",
"type": "n8n-nodes-base.respondToWebhook",
"position": [
1552,
944
],
"parameters": {
"options": {},
"respondWith": "json",
"responseBody": "={{ { \"status\": \"success\", \"received\": $json.body, \"processed_at\": $now.toISO() } }}"
},
"typeVersion": 1.1
},
{
"id": "2bf3244b-8dfd-4cb8-8daa-47e6617d91f0",
"name": "聊天触发器 - AI 助手",
"type": "@n8n/n8n-nodes-langchain.chatTrigger",
"position": [
-400,
1568
],
"webhookId": "beginner-chat-assistant",
"parameters": {
"public": true,
"options": {
"title": "n8n Beginner's Assistant",
"subtitle": "Your AI helper for learning n8n",
"responseMode": "lastNode"
},
"initialMessages": "Hello! I'm an n8n AI assistant. Ask me anything about n8n workflows!\n\nTry asking:\n- How do I use the IF node?\n- What's the Code node for?\n- How do I call external APIs?"
},
"typeVersion": 1.1
},
{
"id": "ac85dfaf-f606-44b5-b2eb-65f3988f1874",
"name": "关于聊天 + AI",
"type": "n8n-nodes-base.stickyNote",
"position": [
-528,
1168
],
"parameters": {
"color": 3,
"width": 380,
"height": 576,
"content": "## 聊天触发器 + AI 助手"
},
"typeVersion": 1
},
{
"id": "597eee76-e669-439b-a063-d1efc915d67f",
"name": "窗口缓冲内存",
"type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
"position": [
192,
1536
],
"parameters": {
"contextWindowLength": 10
},
"typeVersion": 1.2
},
{
"id": "29e89cad-0ecb-4bd4-9c70-1b11a78a8dad",
"name": "OpenAI 聊天模型",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
0,
1536
],
"parameters": {
"options": {
"maxTokens": 500,
"temperature": 0.7
}
},
"typeVersion": 1
},
{
"id": "c835131a-07ec-4e77-82bc-aaf9644d17b7",
"name": "工具：当前时间",
"type": "@n8n/n8n-nodes-langchain.toolCode",
"position": [
448,
1584
],
"parameters": {
"name": "get_current_time",
"description": "返回当前日期和时间。当用户询问当前时间、日期、星期几等时使用此工具。"
},
"typeVersion": 1
},
{
"id": "68818e55-db72-4660-9810-709877f2f90b",
"name": "工具：计算器",
"type": "@n8n/n8n-nodes-langchain.toolCode",
"position": [
640,
1584
],
"parameters": {
"name": "calculate",
"jsCode": "// Parse input string and calculate\nconst input = $input;\nconst expression = typeof input === 'string' ? input : JSON.stringify(input);\n\ntry {\n // Simple eval for basic math (in production, use a proper math parser)\n const result = eval(expression.replace(/[^0-9+\\-*/().\\s]/g, ''));\n return JSON.stringify({ result: result, expression: expression });\n} catch (error) {\n return JSON.stringify({ error: 'Invalid mathematical expression', input: expression });\n}",
"description": "执行数学计算。输入应为数学表达式字符串，如 '5 + 3' 或 '10 * 2'。"
},
"typeVersion": 1
},
{
"id": "9bfbc587-b48c-445d-afa4-32ed86183ce5",
"name": "AI 助手 - n8n 助手",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
0,
1232
],
"parameters": {
"options": {
"systemMessage": "=You are a helpful n8n workflow assistant for beginners.\n\nYour role:\n- Explain n8n concepts in simple terms\n- Provide examples and best practices\n- Help users understand nodes and their connections\n- Be encouraging and patient\n\nKey Topics:\n- Triggers (Manual, Webhook, Schedule, Chat)\n- Data Processing (Set, Code, Edit Fields)\n- Logic (IF, Switch, Merge)\n- Integrations (HTTP Request, APIs)\n- AI Features (Chat Trigger, AI Agent, Tools)\n\nAlways:\n- Use clear, beginner-friendly language\n- Provide practical examples\n- Suggest next learning steps"
},
"hasOutputParser": true
},
"typeVersion": 1.7
},
{
"id": "3c1d13db-6558-4296-9928-cebe9163de4c",
"name": "关于 AI 工具",
"type": "n8n-nodes-base.stickyNote",
"position": [
400,
1152
],
"parameters": {
"color": 3,
"width": 360,
"height": 588,
"content": "## AI 助手工具"
},
"typeVersion": 1
},
{
"id": "098527ad-4c10-4865-8fd4-922bf0e8a3ef",
"name": "Schedule - Every Monday 9 AM",
"type": "n8n-nodes-base.scheduleTrigger",
"position": [
-400,
976
],
"parameters": {
"rule": {
"interval": [
{
"field": "cronExpression",
"expression": "0 9 * * 1"
}
]
}
},
"typeVersion": 1.2
},
{
"id": "051f647b-7a26-495a-b268-3c32f4b97185",
"name": "About Schedules",
"type": "n8n-nodes-base.stickyNote",
"position": [
-528,
480
],
"parameters": {
"color": 7,
"width": 360,
"height": 660,
"content": "## Schedule Trigger\n\n**Purpose:** Run workflows on schedule\n\n**Options:**\n- **Seconds/Minutes** - Short intervals\n- **Hours** - Hourly tasks\n- **Days** - Daily jobs\n- **Weeks** - Weekly reports\n- **Cron** - Custom schedules\n\n**Example Cron:**\n- `0 9 * * 1` - Monday 9 AM\n- `0 */6 * * *` - Every 6 hours\n- `0 0 1 * *` - First day of month\n\n**Use Cases:**\n- Daily reports\n- Data synchronization\n- Cleanup tasks"
},
"typeVersion": 1
},
{
"id": "1d7cb17d-2ef8-4500-8199-e48e3505b831",
"name": "Final Summary",
"type": "n8n-nodes-base.set",
"position": [
1552,
224
],
"parameters": {
"options": {},
"assignments": {
"assignments": [
{
"id": "final-summary",
"name": "workflow_summary",
"type": "string",
"value": "=Workflow executed successfully!\n\nProcessed items: {{ $items().length }}\nTimestamp: {{ $now.toISO() }}\n\nThis beginner workflow demonstrated:\n- Data creation and manipulation\n- Conditional logic\n- API integrations\n- AI capabilities\n\nNext: Explore n8n documentation and build your own workflows!"
}
]
}
},
"typeVersion": 3.3
}
],
"pinData": {},
"connections": {
"Set Initial Data": {
"main": [
[
{
"node": "Code Node - Custom Processing",
"type": "main",
"index": 0
}
]
]
},
"Tool: Calculator": {
"ai_tool": [
[
{
"node": "AI Agent - n8n Assistant",
"type": "ai_tool",
"index": 0
}
]
]
},
"True Branch Data": {
"main": [
[
{
"node": "Merge Both Branches",
"type": "main",
"index": 0
}
]
]
},
"False Branch Data": {
"main": [
[
{
"node": "Merge Both Branches",
"type": "main",
"index": 1
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent - n8n Assistant",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Split Users Array": {
"main": [
[
{
"node": "Extract User Fields",
"type": "main",
"index": 0
}
]
]
},
"Tool: Current Time": {
"ai_tool": [
[
{
"node": "AI Agent - n8n Assistant",
"type": "ai_tool",
"index": 0
}
]
]
},
"Extract User Fields": {
"main": [
[
{
"node": "OpenAI API - Generate Fun Fact",
"type": "main",
"index": 0
}
]
]
},
"Merge Both Branches": {
"main": [
[
{
"node": "Final Summary",
"type": "main",
"index": 0
}
]
]
},
"Window Buffer Memory": {
"ai_memory": [
[
{
"node": "AI Agent - n8n Assistant",
"type": "ai_memory",
"index": 0
}
]
]
},
"Webhook - Receive Data": {
"main": [
[
{
"node": "Send Webhook Response",
"type": "main",
"index": 0
}
]
]
},
"IF Condition - Route Data": {
"main": [
[
{
"node": "True Branch Data",
"type": "main",
"index": 0
}
],
[
{
"node": "False Branch Data",
"type": "main",
"index": 0
}
]
]
},
"HTTP Request - Fetch Users": {
"main": [
[
{
"node": "Split Users Array",
"type": "main",
"index": 0
}
]
]
},
"Chat Trigger - AI Assistant": {
"main": [
[
{
"node": "AI Agent - n8n Assistant",
"type": "main",
"index": 0
}
]
]
},
"Start Here - Manual Trigger": {
"main": [
[
{
"node": "Set Initial Data",
"type": "main",
"index": 0
}
]
]
},
"Code Node - Custom Processing": {
"main": [
[
{
"node": "IF Condition - Route Data",
"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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