<cn>
#### 多表单联动
在Form之外，通过`submit`从外部提交表单，反之 则推荐使用 `<Button htmlType="submit" />`调用原生提交逻辑
</cn>

```vue
<template>
  <div style="width:512px">
    <Form name="withmodal" :model="group" :rules="rules" :labelCol="labelCol" :wrapperCol="wrapperCol">
      <FormItem label="Gruop" prop="name">
        <Input />
      </FormItem>
      <FormItem label="UserList">
        <div style="fontSize: 13px; color: '#aaa'; line-height: 1.5">
          <template v-if="group.list.length">
            <p :key="i" v-for="(item,i) in group.list">{{item.username}} - {{item.age}}</p>
          </template>
          <span v-else>No user</span>
        </div>
      </FormItem>
      <FormItem :wrapperCol="{offset: 6}">
        <Button type="primary" htmlType="submit">Submit</Button>
        <Button @click="visible=true" style="margin-left:10px">Add User</Button>
      </FormItem>
    </Form>

    <Modal v-model="visible" title="新增用户" :width="450" @ok="onOk" @cancel="onCancel">
      <Form :labelCol="labelCol" :wrapperCol="wrapperCol" name="modal" :model="form" :rules="userRules" @submit="onSubmit" ref="form">
        <FormItem label="Usename" prop="username">
          <Input placeholder="请输入姓名" />
        </FormItem>
        <FormItem label="Age" prop="age">
          <Input placeholder="请输入年龄" />
        </FormItem>
      </Form>
    </Modal>
  </div>
</template>
<script>
export default {
  data() {
    return {
      labelCol: { span: 6 },
      wrapperCol: { span: 16 },
      rules: {
        name: [
          { required: true, message: '请输入组织名称' }
        ]
      },
      form: {
        username: '',
        age: ''
      },
      userRules: {
        username: [
          { required: true, message: '请输入组织名称' }
        ],
        age: [
          { required: true, message: '请输入年龄' },
          { type: 'number', message: '请输入正确的年龄' }
        ],
      },
      visible: false,
      group: {
        name: '',
        list: []
      }
    }

  },
  methods: {
    onSubmit({ valid, model }) {
      if (valid) {
        this.group.list.push(model)
        this.$refs.form.reset()
        this.visible = false
      }
    },
    onOk() {
      this.$refs.form.submit()
    },
    onCancel() {
      this.$refs.form.reset()
    },

  }
}
</script>
```