There is an error of "missing update condition" when THINKPHP5 modifies database data.

the environmental background of the problems and what methods you have tried

related codes

/ / Please paste the code text below (do not replace the code with pictures)
first picture code
public function edit () {

$db_01=new DB();
$id_edit=Request::instance()->param("id");
$m=$db_01::table("caipin")->where("id",$id_edit)->select();
$this->assign("m",$m);
return view();

}

second picture code
< form action= "{: url ("Guanli/tz")}" method= "POST" >

    
     {volist name="m" id="vo_edit"}
        <text style="font-size: 15px;" type="" name="id" value="">{$vo_edit.id}                    </text><br>
        <input type="" name="name" value="{$vo_edit.cp_name}"><br>
        <input type="" name="price" value="{$vo_edit.cp_price}"><br>
        <input type="" name="kind" value="{$vo_edit.cp_kind}"><br>
        <input type="submit" name="" value=""><br>
    {/volist}     
</form>

figure 3 Code

public function  tz(){

      if(request()->isPost()){
        $data=[
          "id"=>input("id"),// idIDname
          "cp_name"=>input("name"),//form
          "cp_price"=>input("price"),
           "cp_kind"=>input("kind"),
          ];
         var_dump($data);
              $db=new DB();              
              if($db::table("caipin")->update($data)){        //
                return $this->success("");    //  lst 
            }
            else{
                return $this->error("");
            }


        }

}

what result do you expect? What is the error message actually seen?

Why is the data passed but cannot be updated to the database