主子表：同步三种模式的代码

src/views/infra/demo04/DemoStudentForm.vue

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+<template>
+  <Dialog :title="dialogTitle" v-model="dialogVisible">
+    <el-form
+      ref="formRef"
+      :model="formData"
+      :rules="formRules"
+      label-width="100px"
+      v-loading="formLoading"
+    >
+      <el-form-item label="字段 1" prop="field1">
+        <el-input v-model="formData.field1" placeholder="请输入字段 1" />
+      </el-form-item>
+      <el-form-item label="字段 2" prop="field2">
+        <el-input v-model="formData.field2" placeholder="请输入字段 2" />
+      </el-form-item>
+      <el-form-item label="字段 3" prop="field3">
+        <el-input v-model="formData.field3" placeholder="请输入字段 3" />
+      </el-form-item>
+    </el-form>
+    <!-- 子表的表单 -->
+    <el-tabs v-model="subTabsName">
+      <el-tab-pane label="联系人信息" name="DemoStudentContact">
+        <DemoStudentContactForm ref="demoStudentContactFormRef" :student-id="formData.id" />
+      </el-tab-pane>
+      <el-tab-pane label="地址信息" name="DemoStudentAddress">
+        <DemoStudentAddressForm ref="demoStudentAddressFormRef" :student-id="formData.id" />
+      </el-tab-pane>
+    </el-tabs>
+    <template #footer>
+      <el-button @click="submitForm" type="primary" :disabled="formLoading">确 定</el-button>
+      <el-button @click="dialogVisible = false">取 消</el-button>
+    </template>
+  </Dialog>
+</template>
+<script setup lang="ts">
+import * as DemoStudentApi from '@/api/infra/demo02'
+import DemoStudentContactForm from './DemoStudentContactForm.vue'
+import DemoStudentAddressForm from './DemoStudentAddressForm.vue'
+
+const { t } = useI18n() // 国际化
+const message = useMessage() // 消息弹窗
+
+const dialogVisible = ref(false) // 弹窗的是否展示
+const dialogTitle = ref('') // 弹窗的标题
+const formLoading = ref(false) // 表单的加载中：1）修改时的数据加载；2）提交的按钮禁用
+const formType = ref('') // 表单的类型：create - 新增；update - 修改
+const formData = ref({
+  id: undefined
+})
+const formRules = reactive({
+  field2: [required]
+})
+const formRef = ref() // 表单 Ref
+
+/** 子表的表单 */
+const demoStudentContactFormRef = ref()
+const demoStudentAddressFormRef = ref()
+const subTabsName = ref('DemoStudentContact')
+
+/** 打开弹窗 */
+const open = async (type: string, id?: number) => {
+  dialogVisible.value = true
+  dialogTitle.value = t('action.' + type)
+  formType.value = type
+  resetForm()
+  // 修改时，设置数据
+  if (id) {
+    // debugger
+    formLoading.value = true
+    try {
+      // formData.value = await DemoStudentApi.getDemoStudent(id)
+      formData.value = {
+        id: id,
+        field1: '1',
+        field2: '22',
+        field3: '333'
+      }
+    } finally {
+      formLoading.value = false
+    }
+  }
+}
+defineExpose({ open }) // 提供 open 方法，用于打开弹窗
+
+/** 提交表单 */
+const emit = defineEmits(['success']) // 定义 success 事件，用于操作成功后的回调
+const submitForm = async () => {
+  // 校验表单
+  await formRef.value.validate()
+  // 校验子表单
+  try {
+    await demoStudentContactFormRef.value.validate()
+  } catch (e) {
+    subTabsName.value = 'DemoStudentContact'
+    return
+  }
+  try {
+    await demoStudentAddressFormRef.value.validate()
+  } catch (e) {
+    subTabsName.value = 'DemoStudentAddress'
+    return
+  }
+  // 提交请求
+  formLoading.value = true
+  try {
+    const data = formData.value as unknown as DemoStudentApi.DemoStudentVO
+    // 拼接子表的数据
+    data.demoStudentContacts = demoStudentContactFormRef.value.getData()
+    data.demoStudentAddress = demoStudentAddressFormRef.value.getData()
+    if (formType.value === 'create') {
+      await DemoStudentApi.createDemoStudent(data)
+      message.success(t('common.createSuccess'))
+    } else {
+      await DemoStudentApi.updateDemoStudent(data)
+      message.success(t('common.updateSuccess'))
+    }
+    dialogVisible.value = false
+    // 发送操作成功的事件
+    emit('success')
+  } finally {
+    formLoading.value = false
+  }
+}
+
+/** 重置表单 */
+const resetForm = () => {
+  formData.value = {
+    id: undefined
+  }
+  formRef.value?.resetFields()
+}
+</script>