会话级动态表单渲染与实时校验联动在复杂 Agent 交互中纯文本对话往往无法胜任高精度、多字段的业务参数录入。比如订机票、填写运维工单或配置数据看板时如果大模型一段一段地追问用户“您的出发时间是哪天”、“您需要几张票”不仅沟通冗长低效而且用户很难随时纠正之前的输入。现代生成式交互的一个核心突破就是会话级动态表单Conversational Dynamic Forms大模型根据当前对话上下文与意图动态吐出一份符合 JSON Schema 规范的交互式表单组件用户在对话流内直接修改控件表单值与大模型进行双向实时校验联动。动态表单 JSON Schema 契约设计大模型输出的表单描述协议必须轻量、严谨且易于前端解析。我们定义如下的标准 FormSchemaexport type FieldType text | number | select | date-picker | switch | slider; export interface FormFieldSchema { key: string; label: string; type: FieldType; required?: boolean; defaultValue?: any; placeholder?: string; options?: Array{ label: string; value: any }; validation?: { min?: number; max?: number; pattern?: string; errorMessage?: string; }; dependencies?: { field: string; condition: equals | greaterThan; value: any; }; } export interface DynamicFormSchema { formId: string; title: string; description?: string; submitButtonText?: string; fields: FormFieldSchema[]; }响应式表单渲染引擎与状态机在前端组件中我们需要基于 Schema 动态递归构建表单控件并实现字段联动与异步校验import React, { useState, useCallback } from react; interface Props { schema: DynamicFormSchema; onSubmit: (values: Recordstring, any) void; onFieldChange?: (key: string, value: any, currentValues: Recordstring, any) void; } export const ConversationalForm: React.FCProps ({ schema, onSubmit, onFieldChange }) { const [formData, setFormData] useStateRecordstring, any(() { const initial: Recordstring, any {}; for (const field of schema.fields) { initial[field.key] field.defaultValue ?? ; } return initial; }); const [errors, setErrors] useStateRecordstring, string({}); const validateField (field: FormFieldSchema, value: any): string | null { if (field.required (value || value null || value undefined)) { return ${field.label} 是必填项; } if (field.validation?.pattern typeof value string) { const reg new RegExp(field.validation.pattern); if (!reg.test(value)) { return field.validation.errorMessage || ${field.label} 格式不正确; } } return null; }; const handleInputChange (key: string, value: any) { const updatedValues { ...formData, [key]: value }; setFormData(updatedValues); const targetField schema.fields.find(f f.key key); if (targetField) { const err validateField(targetField, value); setErrors(prev ({ ...prev, [key]: err || })); } onFieldChange?.(key, value, updatedValues); }; const handleSubmit (e: React.FormEvent) { e.preventDefault(); const newErrors: Recordstring, string {}; let hasError false; for (const field of schema.fields) { const err validateField(field, formData[field.key]); if (err) { newErrors[field.key] err; hasError true; } } setErrors(newErrors); if (!hasError) { onSubmit(formData); } }; return ( form onSubmit{handleSubmit} classNameconversational-form-card div classNameform-header h4{schema.title}/h4 {schema.description p classNameform-desc{schema.description}/p} /div div classNameform-body {schema.fields.map(field { // 处理联动依赖显隐 if (field.dependencies) { const parentVal formData[field.dependencies.field]; if (field.dependencies.condition equals parentVal ! field.dependencies.value) { return null; } } return ( div key{field.key} classNameform-item label classNameform-label {field.required span classNamerequired-mark* /span} {field.label} /label {field.type text ( input typetext value{formData[field.key]} placeholder{field.placeholder} onChange{e handleInputChange(field.key, e.target.value)} className{form-input ${errors[field.key] ? input-error : }} / )} {field.type select ( select value{formData[field.key]} onChange{e handleInputChange(field.key, e.target.value)} classNameform-select option value请选择/option {field.options?.map(opt ( option key{opt.value} value{opt.value} {opt.label} /option ))} /select )} {errors[field.key] span classNameerror-tip{errors[field.key]}/span} /div ); })} /div button typesubmit classNamesubmit-action-btn {schema.submitButtonText || 确认提交} /button /form ); };与大模型意图的主动回流与回显当用户在会话流中点击“确认提交”后表单的状态被冻结为只读卡片保留修改记录同时将表单数据封装为结构化 Message 发送给后端 AgentAgent 收到后无需再从自然语言中反向提取实体直接以结构化 JSON 调用数据库或下游 API如果某个参数不合规Agent 可以在下一轮对话中返回一个微调后的增量 Diff Schema原表单高亮红色字段让用户直接就地修正。从纯文本输入到结构化动态表单是生成式人机协同迈向工业级生产力的关键一步。