代码生成：增加 one 情况下的示例代码

src/views/infra/demo02/bak/DemoStudentAddressForm.vue

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+<template>
+  <el-form
+    ref="formRef"
+    :model="formData"
+    :rules="formRules"
+    label-width="100px"
+    v-loading="formLoading"
+  >
+    <el-form-item label="子字段 1" prop="field1">
+      <el-input v-model="formData.field1" placeholder="请输入字段 1" />
+    </el-form-item>
+    <el-form-item label="子字段 2" prop="field2">
+      <el-input v-model="formData.field2" placeholder="请输入字段 2" />
+    </el-form-item>
+    <el-form-item label="子字段 3" prop="field3">
+      <el-input v-model="formData.field3" placeholder="请输入字段 3" />
+    </el-form-item>
+  </el-form>
+</template>
+<script setup lang="ts">
+const props = defineProps<{
+  studentId: undefined // 学生编号
+}>()
+const formLoading = ref(false) // 表单的加载中
+const formData = ref({})
+const formRules = reactive({
+  field1: [required]
+})
+const formRef = ref() // 表单 Ref
+
+/** 监听主表的关联字段的变化，加载对应的子表数据 */
+watch(
+  () => props.studentId,
+  (val) => {
+    if (val) {
+      formData.value = {
+        field2: '番茄',
+        field3: '西瓜'
+      }
+    } else {
+      formData.value = {}
+    }
+  },
+  { immediate: true }
+)
+
+/** 表单校验 */
+const validate = () => {
+  return formRef.value.validate()
+}
+
+/** 表单值 **/
+const getData = () => {
+  return formData.value
+}
+
+defineExpose({ validate, getData })
+</script>