{
  column: [
    {
      label: '子表单',
      prop: 'dynamic',
      type: 'dynamic',
      children: {
        column: [
          {
            label: '省份',
            prop: 'province',
            type: 'select',
            props: {
              label: 'name',
              value: 'code'
            },
            cascaderItem: [
              'city',
              'area'
            ],
            dicUrl: 'https://cli.avuejs.com/api/area/getProvince',
            rules: [
              {
                required: true,
                message: '请选择省份',
                trigger: 'blur'
              }
            ]
          },
          {
            label: '城市',
            prop: 'city',
            type: 'select',
            props: {
              label: 'name',
              value: 'code'
            },
            row: true,
            dicUrl: 'https://cli.avuejs.com/api/area/getCity/{{key}}?province={{province}}',
            rules: [
              {
                required: true,
                message: '请选择城市',
                trigger: 'blur'
              }
            ]
          },
          {
            label: '地区',
            prop: 'area',
            type: 'select',
            props: {
              label: 'name',
              value: 'code'
            },
            dicUrl: 'https://cli.avuejs.com/api/area/getArea/{{key}}?city={{city}}',
            rules: [
              {
                required: true,
                message: '请选择地区',
                trigger: 'blur'
              }
            ]
          }
        ]
      },
      span: 24
    }
  ]
}