element-ui的el-tree勾选1次角色列表，输出两次?得调用两次接口?

Question

  <el-tree
      :data="dataSource"
      show-checkbox
      node-key="id"
      default-expand-all
      :expand-on-click-node="false"
      @check-change    ="checkChange"
      ref="treeRef"
  />

const checkChange = (obj, status) => {
  console.log(obj,status)
}