实验室预约
展示高级编排操作数据库的能力
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本示例演示了利用工具调用，自动选择调用知识库搜索实验室相关内容，或调用 HTTP 模块实现数据库的 CRUD 操作。
以一个实验室预约为例，用户可以通过对话系统预约、取消、修改预约和查询预约记录。
1. 全局变量使用
通过设计一个全局变量，让用户输入姓名，模拟用户身份信息。实际使用过程中，通常是直接通过嵌入 Token 来标记用户身份。
2. 工具调用
背景知识中，引导模型调用工具去执行不通的操作。
Tips: 这里需要增加适当的上下文，方便模型结合历史记录进行判断和决策~
3. HTTP 模块
HTTP模块中，需要设置 3 个工具参数：
预约行为：可取 get, put, post, delete 四个值，分别对应查询、修改、新增、删除操作。当然，你也可以写4个HTTP模块，来分别处理。
labname: 实验室名。非必填，因为查询和删除时候，不需要。
time: 预约时间。
总结
工具调用模块是非常强大的功能，可以在一定程度上替代问题分类和内容提取。
通过工具模块，动态的调用不同的工具，可以将复杂业务解耦。
附件
编排配置
可直接复制，导入到 FastGPT 中。
编排配置
{
"nodes": [
{
"nodeId": "userChatInput",
"name": "流程开始",
"intro": "当用户发送一个内容后，流程将会从这个模块开始执行。",
"avatar": "/imgs/workflow/userChatInput.svg",
"flowNodeType": "workflowStart",
"position": {
"x": 309.7143912167367,
"y": 1501.2761754220846
},
"inputs": [
{
"key": "userChatInput",
"renderTypeList": [
"reference",
"textarea"
],
"valueType": "string",
"label": "问题输入",
"required": true,
"toolDescription": "用户问题",
"type": "systemInput",
"showTargetInApp": false,
"showTargetInPlugin": false,
"connected": false,
"selectedTypeIndex": 0,
"value": [
"userChatInput",
"userChatInput"
]
}
],
"outputs": [
{
"id": "userChatInput",
"type": "static",
"key": "userChatInput",
"valueType": "string",
"label": "core.module.input.label.user question"
}
]
},
{
"nodeId": "eg5upi",
"name": "指定回复",
"intro": "该模块可以直接回复一段指定的内容。常用于引导、提示。非字符串内容传入时，会转成字符串进行输出。",
"avatar": "/imgs/workflow/reply.png",
"flowNodeType": "answerNode",
"position": {
"x": 1962.729630445213,
"y": 2295.9791334948304
},
"inputs": [
{
"key": "text",
"renderTypeList": [
"textarea",
"reference"
],
"valueType": "any",
"label": "core.module.input.label.Response content",
"description": "core.module.input.description.Response content",
"placeholder": "core.module.input.description.Response content",
"type": "textarea",
"showTargetInApp": true,
"showTargetInPlugin": true,
"connected": true,
"selectedTypeIndex": 1,
"value": [
"40clf3",
"result"
]
}
],
"outputs": []
},
{
"nodeId": "kge59i",
"name": "用户引导",
"intro": "可以配置应用的系统参数。",
"avatar": "/imgs/workflow/userGuide.png",
"flowNodeType": "userGuide",
"position": {
"x": -327.218389965887,
"y": 1504.8056414948464
},
"inputs": [
{
"key": "welcomeText",
"renderTypeList": [
"hidden"
],
"valueType": "string",
"label": "core.app.Welcome Text",
"type": "hidden",
"showTargetInApp": false,
"showTargetInPlugin": false,
"value": "你好，我是实验室助手，请问有什么可以帮助你的么？如需预约或修改预约实验室，请提供姓名、时间和实验室名称。\n[实验室介绍]\n[开放时间]\n[预约]",
"connected": false,
"selectedTypeIndex": 0
},
{
"key": "variables",
"renderTypeList": [
"hidden"
],
"valueType": "any",
"label": "core.module.Variable",
"value": [
{
"id": "gt9b23",
"key": "name",
"label": "name",
"type": "input",
"required": true,
"maxLen": 50,
"enums": [
{
"value": ""
}
]
}
],
"type": "hidden",
"showTargetInApp": false,
"showTargetInPlugin": false,
"connected": false,
"selectedTypeIndex": 0
},
{
"key": "questionGuide",
"valueType": "boolean",
"renderTypeList": [
"hidden"
],
"label": "",
"type": "switch",
"showTargetInApp": false,
"showTargetInPlugin": false,
"value": false,
"connected": false,
"selectedTypeIndex": 0
},
{
"key": "tts",
"renderTypeList": [
"hidden"
],
"valueType": "any",
"label": "",
"type": "hidden",
"showTargetInApp": false,
"showTargetInPlugin": false,
"value": {
"type": "model",
"model": "tts-1",
"voice": "alloy"
},
"connected": false,
"selectedTypeIndex": 0
},
{
"key": "whisper",
"renderTypeList": [
"hidden"
],
"valueType": "any",
"label": "",
"type": "hidden",
"showTargetInApp": false,
"showTargetInPlugin": false,
"connected": false,
"selectedTypeIndex": 0
},
{
"key": "scheduleTrigger",
"renderTypeList": [
"hidden"
],
"valueType": "any",
"label": "",
"value": null
}
],
"outputs": []
},
{
"nodeId": "40clf3",
"name": "HTTP请求",
"intro": "可以发出一个 HTTP 请求，实现更为复杂的操作（联网搜索、数据库查询等）",
"avatar": "/imgs/workflow/http.png",
"flowNodeType": "httpRequest468",
"showStatus": true,
"position": {
"x": 1118.6532653446993,
"y": 1955.886106913907
},
"inputs": [
{
"key": "system_httpMethod",
"renderTypeList": [
"custom"
],
"valueType": "string",
"label": "",
"value": "POST",
"required": true,
"type": "custom",
"showTargetInApp": false,
"showTargetInPlugin": false,
"connected": false,
"selectedTypeIndex": 0
},
{
"valueType": "string",
"renderTypeList": [
"reference"
],
"key": "action",
"label": "action",
"toolDescription": "预约行为，一共四种：\nget - 查询预约情况\nput - 更新预约\npost - 新增预约\ndelete - 删除预约",
"required": true,
"canEdit": true,
"editField": {
"key": true,
"description": true
}
},
{
"valueType": "string",
"renderTypeList": [
"reference"
],
"key": "labname",
"label": "labname",
"toolDescription": "实验室名称",
"required": false,
"canEdit": true,
"editField": {
"key": true,
"description": true
}
},
{
"valueType": "string",
"renderTypeList": [
"reference"
],
"key": "time",
"label": "time",
"toolDescription": "预约时间，按 YYYY/MM/DD HH:mm 格式返回",
"required": false,
"canEdit": true,
"editField": {
"key": true,
"description": true
}
},
{
"key": "system_httpReqUrl",
"renderTypeList": [
"hidden"
],
"valueType": "string",
"label": "",
"description": "core.module.input.description.Http Request Url",
"placeholder": "https://api.ai.com/getInventory",
"required": false,
"type": "hidden",
"showTargetInApp": false,
"showTargetInPlugin": false,
"value": "https://d8dns0.laf.dev/appointment-lab",
"connected": false,
"selectedTypeIndex": 0
},
{
"key": "system_httpHeader",
"renderTypeList": [
"custom"
],
"valueType": "any",
"value": [],
"label": "",
"description": "core.module.input.description.Http Request Header",
"placeholder": "core.module.input.description.Http Request Header",
"required": false,
"type": "custom",
"showTargetInApp": false,
"showTargetInPlugin": false,
"connected": false,
"selectedTypeIndex": 0
},
{
"key": "system_httpParams",
"renderTypeList": [
"hidden"
],
"valueType": "any",
"value": [],
"label": "",
"required": false,
"type": "hidden",
"showTargetInApp": false,
"showTargetInPlugin": false,
"connected": false,
"selectedTypeIndex": 0
},
{
"key": "system_httpJsonBody",
"renderTypeList": [
"hidden"
],
"valueType": "any",
"value": "{\r\n \"name\": \"{{name}}\",\r\n \"time\": \"{{time}}\",\r\n \"labname\": \"{{labname}}\",\r\n \"action\": \"{{action}}\"\r\n}",
"label": "",
"required": false,
"type": "hidden",
"showTargetInApp": false,
"showTargetInPlugin": false,
"connected": false,
"selectedTypeIndex": 0
},
{
"key": "system_addInputParam",
"renderTypeList": [
"addInputParam"
],
"valueType": "dynamic",
"label": "",
"required": false,
"description": "core.module.input.description.HTTP Dynamic Input",
"editField": {
"key": true,
"valueType": true
}
}
],
"outputs": [
{
"id": "system_addOutputParam",
"type": "dynamic",
"key": "system_addOutputParam",
"valueType": "dynamic",
"label": "",
"editField": {
"key": true,
"valueType": true
}
},
{
"id": "result",
"type": "static",
"key": "result",
"valueType": "string",
"label": "result",
"description": "result",
"canEdit": true,
"editField": {
"key": true,
"name": true,
"description": true,
"dataType": true
}
},
{
"id": "httpRawResponse",
"type": "static",
"key": "httpRawResponse",
"valueType": "any",
"label": "原始响应",
"description": "HTTP请求的原始响应。只能接受字符串或JSON类型响应数据。"
}
]
},
{
"nodeId": "fYxwWym8flYL",
"name": "工具调用",
"intro": "通过AI模型自动选择一个或多个功能块进行调用，也可以对插件进行调用。",
"avatar": "/imgs/workflow/tool.svg",
"flowNodeType": "tools",
"showStatus": true,
"position": {
"x": 933.9342354248961,
"y": 1229.3563445150553
},
"inputs": [
{
"key": "model",
"renderTypeList": [
"settingLLMModel",
"reference"
],
"label": "core.module.input.label.aiModel",
"valueType": "string",
"llmModelType": "all",
"value": "gpt-3.5-turbo"
},
{
"key": "temperature",
"renderTypeList": [
"hidden"
],
"label": "",
"value": 0,
"valueType": "number",
"min": 0,
"max": 10,
"step": 1
},
{
"key": "maxToken",
"renderTypeList": [
"hidden"
],
"label": "",
"value": 2000,
"valueType": "number",
"min": 100,
"max": 4000,
"step": 50
},
{
"key": "systemPrompt",
"renderTypeList": [
"textarea",
"reference"
],
"max": 3000,
"valueType": "string",
"label": "core.ai.Prompt",
"description": "core.app.tip.chatNodeSystemPromptTip",
"placeholder": "core.app.tip.chatNodeSystemPromptTip",
"value": "当前时间为: {{cTime}}\n你是实验室助手，用户可能会询问实验室相关介绍或预约实验室。\n请选择合适的工具去帮助他们。"
},
{
"key": "history",
"renderTypeList": [
"numberInput",
"reference"
],
"valueType": "chatHistory",
"label": "core.module.input.label.chat history",
"required": true,
"min": 0,
"max": 30,
"value": 6
},
{
"key": "userChatInput",
"renderTypeList": [
"reference",
"textarea"
],
"valueType": "string",
"label": "用户问题",
"required": true,
"value": [
"userChatInput",
"userChatInput"
]
}
],
"outputs": []
},
{
"nodeId": "JSSQtDgwmmbE",
"name": "知识库搜索",
"intro": "调用“语义检索”和“全文检索”能力，从“知识库”中查找实验室介绍和使用规则等信息。",
"avatar": "/imgs/workflow/db.png",
"flowNodeType": "datasetSearchNode",
"showStatus": true,
"position": {
"x": 447.0795498711184,
"y": 1971.5311041711186
},
"inputs": [
{
"key": "datasets",
"renderTypeList": [
"selectDataset",
"reference"
],
"label": "core.module.input.label.Select dataset",
"value": [],
"valueType": "selectDataset",
"list": [],
"required": true
},
{
"key": "similarity",
"renderTypeList": [
"selectDatasetParamsModal"
],
"label": "",
"value": 0.4,
"valueType": "number"
},
{
"key": "limit",
"renderTypeList": [
"hidden"
],
"label": "",
"value": 1500,
"valueType": "number"
},
{
"key": "searchMode",
"renderTypeList": [
"hidden"
],
"label": "",
"valueType": "string",
"value": "embedding"
},
{
"key": "usingReRank",
"renderTypeList": [
"hidden"
],
"label": "",
"valueType": "boolean",
"value": false
},
{
"key": "datasetSearchUsingExtensionQuery",
"renderTypeList": [
"hidden"
],
"label": "",
"valueType": "boolean",
"value": false
},
{
"key": "datasetSearchExtensionModel",
"renderTypeList": [
"hidden"
],
"label": "",
"valueType": "string",
"value": "gpt-3.5-turbo"
},
{
"key": "datasetSearchExtensionBg",
"renderTypeList": [
"hidden"
],
"label": "",
"valueType": "string",
"value": ""
},
{
"key": "userChatInput",
"renderTypeList": [
"reference",
"textarea"
],
"valueType": "string",
"label": "用户问题",
"required": true,
"toolDescription": "需要检索的内容"
}
],
"outputs": [
{
"id": "quoteQA",
"key": "quoteQA",
"label": "core.module.Dataset quote.label",
"description": "特殊数组格式，搜索结果为空时，返回空数组。",
"type": "static",
"valueType": "datasetQuote"
}
]
},
{
"nodeId": "IdntVQiTopHT",
"name": "工具调用终止",
"intro": "该模块需配置工具调用使用。当该模块被执行时，本次工具调用将会强制结束，并且不再调用AI针对工具调用结果回答问题。",
"avatar": "/imgs/workflow/toolStop.svg",
"flowNodeType": "stopTool",
"position": {
"x": 1969.73331750207,
"y": 2650.0258908119413
},
"inputs": [],
"outputs": []
}
],
"edges": [
{
"source": "40clf3",
"target": "eg5upi",
"sourceHandle": "40clf3-source-right",
"targetHandle": "eg5upi-target-left"
},
{
"source": "userChatInput",
"target": "fYxwWym8flYL",
"sourceHandle": "userChatInput-source-right",
"targetHandle": "fYxwWym8flYL-target-left"
},
{
"source": "fYxwWym8flYL",
"target": "40clf3",
"sourceHandle": "selectedTools",
"targetHandle": "selectedTools"
},
{
"source": "fYxwWym8flYL",
"target": "JSSQtDgwmmbE",
"sourceHandle": "selectedTools",
"targetHandle": "selectedTools"
},
{
"source": "40clf3",
"target": "IdntVQiTopHT",
"sourceHandle": "40clf3-source-right",
"targetHandle": "IdntVQiTopHT-target-left"
}
]
}
Laf 云函数代码
可以在 Laf 中快速构建 HTTP 接口。
函数代码：
import cloud from '@lafjs/cloud'
const db = cloud.database()
type RequestType = {
name: string;
time?: string;
labname?: string;
action: 'post' | 'delete' | 'put' | 'get'
}
export default async function (ctx: FunctionContext) {
try {
const { action,...body } = ctx.body as RequestType
if (action === 'get') {
return await getRecord(ctx.body)
}
if (action === 'post') {
return await createRecord(ctx.body)
}
if (action === 'put') {
return await putRecord(ctx.body)
}
if (action === 'delete') {
return await removeRecord(ctx.body)
}
return {
result: "异常"
}
} catch (err) {
return {
result: "异常"
}
}
}
async function putRecord({ name, time, labname }: RequestType) {
const missData = []
if (!name) missData.push("你的姓名")
if (missData.length > 0) {
return {
result: `请提供: ${missData.join("、")}`
}
}
const { data: record } = await db.collection("LabAppointment").where({
name, status: "unStart"
}).getOne()
if (!record) {
return {
result: `${name} 还没有预约记录`
}
}
const updateWhere = {
name,
time: time || record.time,
labname: labname || record.labname
}
await db.collection("LabAppointment").where({
name, status: "unStart"
}).update(updateWhere)
return {
result: `修改预约成功。
姓名：${name}·
时间: ${updateWhere.time}
实验室名: ${updateWhere.labname}
` }
}
async function getRecord({ name }: RequestType) {
if (!name) {
return {
result: "请提供你的姓名"
}
}
const { data } = await db.collection('LabAppointment').where({ name, status: "unStart" }).getOne()
if (!data) {
return {
result: `${name} 没有预约中的记录`
}
}
return {
result: `${name} 有一条预约记录：
姓名：${data.name}
时间: ${data.time}
实验室名: ${data.labname}
`
}
}
async function removeRecord({ name }: RequestType) {
if (!name) {
return {
result: "请提供你的姓名"
}
}
const { deleted } = await db.collection('LabAppointment').where({ name, status: "unStart" }).remove()
if (deleted > 0) {
return {
result: `取消预约记录成功: ${name}`
}
}
return {
result: ` ${name} 没有预约中的记录`
}
}
async function createRecord({ name, time, labname }: RequestType) {
const missData = []
if (!name) missData.push("你的姓名")
if (!time) missData.push("需要预约的时间")
if (!labname) missData.push("实验室名名称")
if (missData.length > 0) {
return {
result: `请提供: ${missData.join("、")}`
}
}
const { data: record } = await db.collection("LabAppointment").where({
name, status: "unStart"
}).getOne()
if (record) {
return {
result: `您已经有一个预约记录了:
姓名：${record.name}
时间: ${record.time}
实验室名: ${record.labname}
每人仅能同时预约一个实验室名。
`
}
}
await db.collection("LabAppointment").add({
name, time, labname, status: "unStart"
})
return {
result: `预约成功。
姓名：${name}
时间: ${time}
实验室名: ${labname}
` }
}
