基于GPT-4o的餐厅订单聊天机器人（POS集成）
高级
这是一个Sales, Support, AI领域的自动化工作流，包含 19 个节点。主要使用 If, Code, GoogleSheets, SplitInBatches, Agent 等节点，结合人工智能技术实现智能自动化。 基于GPT-4o的餐厅订单聊天机器人，支持POS系统集成
前置要求
- •Google Sheets API 凭证
- •OpenAI API Key
使用的节点 (19)
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": "d73282515b90623d4a8783919a2d772c706425d649e1512792f37ac51e07e4a8"
},
"nodes": [
{
"id": "62b3c7cb-1993-44f1-8b86-38a34ca1d029",
"name": "信息提取器",
"type": "@n8n/n8n-nodes-langchain.informationExtractor",
"position": [
-200,
500
],
"parameters": {
"text": "={{ $json.query }}",
"options": {},
"schemaType": "fromJson",
"jsonSchemaExample": "{\n \"name\": \"Information Extractor\",\n \"type\": \"n8n-nodes-base.informationExtractor\",\n \"parameters\": {\n \"extract\": [\n {\n \"name\": \"items\",\n \"pattern\": \"(latte|coffee|tea|cappuccino)\"\n },\n {\n \"name\": \"quantity\",\n \"pattern\": \"\\\\d+\"\n },\n {\n \"name\": \"table\",\n \"pattern\": \"table number (\\\\d+)\"\n }\n ]\n }\n}\n"
},
"typeVersion": 1
},
{
"id": "75883f27-af58-4791-9e1a-a70b83e1cead",
"name": "OpenAI 聊天模型1",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-180,
740
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {}
},
"credentials": {
"openAiApi": {
"id": "OizdHUANhz9NIHyd",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
},
{
"id": "aeefdd4b-bf7d-4824-97d8-0afc356fb7d6",
"name": "如果",
"type": "n8n-nodes-base.if",
"position": [
120,
540
],
"parameters": {
"options": {},
"conditions": {
"options": {
"version": 2,
"leftValue": "",
"caseSensitive": true,
"typeValidation": "strict"
},
"combinator": "and",
"conditions": [
{
"id": "8a5dda0c-a567-4305-83a3-68d6fb573dd3",
"operator": {
"type": "array",
"operation": "empty",
"singleValue": true
},
"leftValue": "={{ $json.output.parameters.extract }}",
"rightValue": ""
}
]
}
},
"typeVersion": 2.2
},
{
"id": "9e3f8a1b-ccd8-4f4d-91cb-b99cc46f412f",
"name": "Google Sheets",
"type": "n8n-nodes-base.googleSheets",
"position": [
840,
420
],
"parameters": {
"columns": {
"value": {
"Item": "={{ $json.item }}",
"Quantity": "={{ $json.quantity }}",
"Table No": "={{ $json.table }}",
"Timestamp": "={{ $now }}"
},
"schema": [
{
"id": "Timestamp",
"type": "string",
"display": true,
"required": false,
"displayName": "Timestamp",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Table No",
"type": "string",
"display": true,
"required": false,
"displayName": "Table No",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Item",
"type": "string",
"display": true,
"required": false,
"displayName": "Item",
"defaultMatch": false,
"canBeUsedToMatch": true
},
{
"id": "Quantity",
"type": "string",
"display": true,
"required": false,
"displayName": "Quantity",
"defaultMatch": false,
"canBeUsedToMatch": true
}
],
"mappingMode": "defineBelow",
"matchingColumns": [],
"attemptToConvertTypes": false,
"convertFieldsToString": false
},
"options": {},
"operation": "append",
"sheetName": {
"__rl": true,
"mode": "list",
"value": "gid=0",
"cachedResultUrl": "https://docs.google.com/spreadsheets/d/16fXaxEcfnq_-oif9tp94-3uTeHSFWoSnuBPNTljuW-k/edit#gid=0",
"cachedResultName": "Order log"
},
"documentId": {
"__rl": true,
"mode": "url",
"value": "https://docs.google.com/spreadsheets/d/16fXaxEcfnq_-oif9tp94-3uTeHSFWoSnuBPNTljuW-k/edit?usp=sharing"
}
},
"credentials": {
"googleSheetsOAuth2Api": {
"id": "0RSJGMBcFzxY9GkS",
"name": "Google Sheets account"
}
},
"typeVersion": 4.5
},
{
"id": "4cc1818f-1585-42e1-a111-7b55557aebcb",
"name": "代码",
"type": "n8n-nodes-base.code",
"position": [
380,
560
],
"parameters": {
"language": "python",
"pythonCode": "# Input from n8n\ninput_data = items\n\n# Get the extracted list\nextract_data = input_data[0].get('json', {}).get('output', {}).get('parameters', {}).get('extract', [])\n\n# Prepare variables\norder_items = []\ntable_number = None\n\n# Separate entries by type\nitems_list = []\nquantities = []\n\n# Parse all entries\nfor entry in extract_data:\n if entry['name'] == 'table number':\n table_number = entry['pattern']\n elif entry['name'] == 'item':\n items_list.append(entry['pattern'])\n elif entry['name'] == 'quantity':\n quantities.append(int(entry['pattern']))\n\n# Pair items and quantities\nfor i in range(len(items_list)):\n item_data = {\n 'item': items_list[i],\n 'quantity': quantities[i] if i < len(quantities) else None,\n 'table': table_number\n }\n order_items.append(item_data)\n\n# Set final output\noutput = [{'json': item} for item in order_items]\n\nreturn output"
},
"typeVersion": 2
},
{
"id": "a92d2745-148b-4e2a-b8f7-82d3993ff34f",
"name": "遍历项目",
"type": "n8n-nodes-base.splitInBatches",
"position": [
620,
500
],
"parameters": {
"options": {}
},
"typeVersion": 3
},
{
"id": "aea89e6c-37a9-4859-adc8-b7e449701503",
"name": "替换我",
"type": "n8n-nodes-base.noOp",
"position": [
800,
660
],
"parameters": {},
"typeVersion": 1
},
{
"id": "b31dba52-b27e-4267-be32-a7730b4d08a8",
"name": "无操作，不执行任何动作",
"type": "n8n-nodes-base.noOp",
"position": [
440,
400
],
"parameters": {},
"typeVersion": 1
},
{
"id": "d7f9a381-6bc2-44d0-81ac-6e0fbe77d70a",
"name": "便签",
"type": "n8n-nodes-base.stickyNote",
"position": [
-260,
220
],
"parameters": {
"color": 3,
"width": 340,
"height": 680,
"content": "## JSON 解析器"
},
"typeVersion": 1
},
{
"id": "acc7a528-f767-4576-b08d-6fc386f57648",
"name": "便签1",
"type": "n8n-nodes-base.stickyNote",
"position": [
100,
220
],
"parameters": {
"color": 2,
"width": 460,
"height": 680,
"content": "## 优化/将 JSON 拆分为多个项目"
},
"typeVersion": 1
},
{
"id": "857a3102-f5e1-4db5-afb4-154544414701",
"name": "便签2",
"type": "n8n-nodes-base.stickyNote",
"position": [
580,
220
],
"parameters": {
"color": 4,
"width": 440,
"height": 680,
"content": "## 将每个项目作为记录发送到 Google 表格"
},
"typeVersion": 1
},
{
"id": "a1ff2b0f-0b48-4ea2-8121-4e2d72197ef7",
"name": "在餐厅聊天工作流中触发",
"type": "n8n-nodes-base.executeWorkflowTrigger",
"position": [
-440,
500
],
"parameters": {
"inputSource": "passthrough"
},
"typeVersion": 1.1
},
{
"id": "8689b773-a1c4-4de4-a66e-fab8c9eb6244",
"name": "当收到聊天消息时",
"type": "@n8n/n8n-nodes-langchain.chatTrigger",
"position": [
-140,
-280
],
"webhookId": "d931c4a7-02f5-4359-918f-7ad3fae7b144",
"parameters": {
"public": true,
"options": {}
},
"typeVersion": 1.1
},
{
"id": "de310ce2-3868-4a0f-aa9b-38253e75dbda",
"name": "AI 代理",
"type": "@n8n/n8n-nodes-langchain.agent",
"position": [
100,
-260
],
"parameters": {
"options": {
"systemMessage": "\n\nYou are a polite and efficient restaurant assistant.\n\nYour job is to take customer orders, verify the order details, correct any mistakes, and confirm the order.\n\nFollow these steps:\n\nGreeting and Asking for the Order\n\nIf the customer greets you (e.g., \"Hello\", \"Hi\", \"Good evening\"), respond with:\n\n\"Hello! How can I assist you today? What would you like to order?\"\n\nOrder Parsing and Understanding\n\nAccept orders in flexible formats, such as:\n\n\"1 latte, 2 coffee, table number 5\"\n\n\"latte 2, pepsi 1, table 3\"\n\n\"1 cappucino\"\n\n\"1 tea table no 4\"\n\nYour goal is to extract the following:\n\nItem names (e.g., latte, coffee, chocolate, tea, pepsi)\n\nQuantities (must be numeric)\n\nTable number (must be numeric)\n\nVerify and Handle Missing or Incorrect Information\n\nFor each item in the order:\n\nIf the item name is missing, respond:\n\"Sorry, the item name is missing. What would you like to order?\"\n\nIf the quantity is missing, respond:\n\"How many [item] would you like?\"\n\nIf the table number is missing, respond:\n\"Could you please provide a table number?\"\n\nIf there are spelling mistakes in the item name, suggest corrections. Example:\n\"Did you mean chocolate instead of chocolat? Please confirm.\"\n\nUse fuzzy matching to detect common variations and typos.\n\nFinal Confirmation\n\nOnce all necessary details are collected, present an order summary like this:\n\nHere’s your order summary:\n\n1 latte\n\n2 coffee\n\nTable number: 5\nShall I confirm this order?\n\nOn Confirmation: Use the Tool\n\nWhen the user confirms, use the tool ConfirmOrder to send the final confirmation message as plain text in this format:\n\nThank you for confirming! Your order will be prepared shortly. Enjoy your time with us!\n\nOrder details are following:\nitem quantity\nlatte 1\ncoffee 2\n\nAdded to table number 5\n\nEnsure numeric values (quantities and table numbers) are correctly extracted, even if they appear at the start or end. Always confirm with the user if there is any uncertainty.\n\n\n\n\n\n\n\n\n"
}
},
"typeVersion": 1.9
},
{
"id": "9dda45ee-0a92-448c-8a7e-8daa99282cda",
"name": "OpenAI 聊天模型",
"type": "@n8n/n8n-nodes-langchain.lmChatOpenAi",
"position": [
-20,
20
],
"parameters": {
"model": {
"__rl": true,
"mode": "list",
"value": "gpt-4o-mini"
},
"options": {
"responseFormat": "text"
}
},
"credentials": {
"openAiApi": {
"id": "OizdHUANhz9NIHyd",
"name": "OpenAi account"
}
},
"typeVersion": 1.2
},
{
"id": "0c0189d5-8fb4-4679-b2e2-221a3e2a4c88",
"name": "调用 n8n 工作流工具",
"type": "@n8n/n8n-nodes-langchain.toolWorkflow",
"position": [
360,
20
],
"parameters": {
"workflowId": {
"__rl": true,
"mode": "list",
"value": "wgaJ0eJQtYA8oKSC",
"cachedResultName": "Restaurant POS workflow"
},
"description": "此工具将 AI 代理节点生成的文本输出发送到另一个 n8n 工作流进行额外处理或自动化",
"workflowInputs": {
"value": {},
"schema": [],
"mappingMode": "defineBelow",
"matchingColumns": [],
"attemptToConvertTypes": false,
"convertFieldsToString": false
}
},
"notesInFlow": false,
"typeVersion": 2.2
},
{
"id": "9292db7f-6ffc-486e-b31a-bcbd6ef7ab98",
"name": "最近 5 次对话记忆",
"type": "@n8n/n8n-nodes-langchain.memoryBufferWindow",
"position": [
140,
40
],
"parameters": {},
"typeVersion": 1.3
},
{
"id": "2782d5b6-d33b-4c89-ac79-90bf380f0828",
"name": "便签3",
"type": "n8n-nodes-base.stickyNote",
"position": [
60,
-380
],
"parameters": {
"width": 340,
"height": 300,
"content": "## 餐厅订单聊天机器人"
},
"typeVersion": 1
},
{
"id": "7c298718-e9e3-40d3-a612-94c578bd3100",
"name": "便签4",
"type": "n8n-nodes-base.stickyNote",
"position": [
500,
-20
],
"parameters": {
"color": 5,
"content": "## 调用子工作流"
},
"typeVersion": 1
}
],
"pinData": {},
"connections": {
"If": {
"main": [
[
{
"node": "No Operation, do nothing",
"type": "main",
"index": 0
}
],
[
{
"node": "Code",
"type": "main",
"index": 0
}
]
]
},
"Code": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"AI Agent": {
"main": [
[]
]
},
"Replace Me": {
"main": [
[
{
"node": "Loop Over Items",
"type": "main",
"index": 0
}
]
]
},
"Loop Over Items": {
"main": [
[
{
"node": "Google Sheets",
"type": "main",
"index": 0
}
],
[
{
"node": "Replace Me",
"type": "main",
"index": 0
}
]
]
},
"OpenAI Chat Model": {
"ai_languageModel": [
[
{
"node": "AI Agent",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"OpenAI Chat Model1": {
"ai_languageModel": [
[
{
"node": "Information Extractor",
"type": "ai_languageModel",
"index": 0
}
]
]
},
"Information Extractor": {
"main": [
[
{
"node": "If",
"type": "main",
"index": 0
}
]
]
},
"Call n8n Workflow Tool": {
"ai_tool": [
[
{
"node": "AI Agent",
"type": "ai_tool",
"index": 0
}
]
]
},
"When chat message received": {
"main": [
[
{
"node": "AI Agent",
"type": "main",
"index": 0
}
]
]
},
"Last 5 conversations Memory": {
"ai_memory": [
[
{
"node": "AI Agent",
"type": "ai_memory",
"index": 0
}
]
]
},
"Triggered on Restaurant Chat workflow": {
"main": [
[
{
"node": "Information Extractor",
"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 - 销售, 客户支持, 人工智能
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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