递归获取数据

    let arr = []
    getAllData(data) {
      for (let i = 0; i < data.length; i++) {
        arr.push({
          departName: data[i].departName,
          id: data[i].id
        })
         if(data[i].children){
            if (data[i].children.length > 0) {
            this.getAllDepart(data[i].children)
          }
        }
      }
    }