el-cascader 全国省市下拉框回显

<a-col :span="24">
  <a-form-item label="省份地市" :labelCol="labelCol" :wrapperCol="wrapperCol">
    <el-cascader ref="cascader"  v-decorator="['provinceCity',validatorRules.provinceCity]"  :options="options" size="small"   @change="handleChange"    clearable></el-cascader>
    <a-input v-decorator="['telCode']" style="display:none"></a-input>
  </a-form-item>
</a-col>

const _cascader = this.$refs.cascader
if (_cascader) {
    _cascader.$refs.panel.checkedValue = []
    _cascader.$refs.panel.activePath = [] 
    _cascader.$refs.panel.syncActivePath()
}
//类型为修改，查询省份地市数据
let params = {'telCode':record.telCode};
getAction(this.url.queryProvinceCityByCodeUrl,params).then((res)=>{
  
  this.form.setFieldsValue({provinceCity:res});
});