为什么php修改数据无法同步到数据库，只是当前页面修改成功？

Question

接口：

public function updateRole($f_name,$u_name,$r_name,$i_name){
   $res = Db::table("fa_waem_instrument_info")
       ->field('fa_dms_room.r_name,info.i_name,fa_dms_unit.u_name,info.i_type,fa_dms_floor.f_name')
       ->alias('info')
       ->join('fa_dms_room ', 'info.room_id = fa_dms_room.id ')
       ->join('fa_dms_unit ', ' fa_dms_room.id = fa_dms_unit.id')
       ->join('fa_dms_floor ', '  fa_dms_unit.id = fa_dms_floor.id ')
       ->where('f_name',$f_name)
       ->update(['r_name'=>+$r_name,'f_name'=>$f_name,'u_name'=>$u_name,'i_name'=>$i_name]);
   $this->success("修改",$res);}

前端：

submit: function () {
   console.log("修改为：", this.item)
   this.axios.get("Waterelectricity/updateRole?f_name=" + this.item.f_name + "&r_name=" + this.item.r_name+ "&u_name=" + this.item.u_name+ "&i_name=" + this.item.i_name).then(res => {
       console.log("修改---", res)
       this.show = false;
   })
},

Answer 1

update(['r_name'=>+$r_name,'f_name'=>$f_name,'u_name'=>$u_name,'i_name'=>$i_name]); 多了一个“+”号