thinkphp Two-level linkage

<! --Front-end Code section--
<Divclass= "Pop-movegroup"ID= "Salesmanbox">    <DL>        <DT>Select a promotion account:</DT>        <DD>
            
<!--first-level linkage data is queried and traversed.<Selectname= "Salesman"ID= "Salesman">                <volistname= "Salesman"ID= "Vo">                    <optionvalue= "{$vo. ID}">{$vo. uname}</option>                </volist>            </Select><!--level Two linkage<Selectname= "Lib"ID= "Libs">                   </Select>        </DD>        <DDclass= "Center">            <inputtype= "hidden"ID= ' uid 'value= "{$_get[' uid ']|intval}">            <inputtype= "button"class= "Btn_b mr10"value= "Confirm"onclick= "Admin.domovesalesuser ()">            <inputtype= "button"class= "Btn_w"value= "Cancel"onclick= "Ui.box.close ()">        </DD>    </DL></Div>

JS section:

 <Scripttype= "Text/javascript">
Click the option in the first level linkage to get the ID and then go to query the corresponding data
        $("#salesman"). Change (function(){
Get IDvarCATID=$("#salesman"). val ();//submit ID to background $.post ("{: U (' Admin/user/doaddsalesusers ')}","id="+catid,function(data) {//Empty two-level linkage $ ("#libs"). empty (); //console.log (data);                varCount=data.data.length; varI= 0; varb="";
Display the corresponding data according to the data returned by the backend for(i=0; I<Count;i++) {b+="<option value= '"+Data.data[i].uid+"' >"+Data.data[i].uname+"</option>"; }                $("#libs"). Append (b);        }); });//Click on the data in the level two menu Admin.domovesalesuser= function(){
Get IDvarID= $('#libs'). Val (); if(!ID) {Ui.error ('no Promotion account selected' );return false; }
To start bindingvarUID= $('#uid'). Val (); $.post (U ('Admin/user/doaddsalesuser'), {uid:uid,sid:id},function(msg) {ajaxreload (msg); //location.href = U (' Admin/user/index ');            },'JSON'); }; </Script>

Back-End Code section:

 Public functiondoaddsalesusers () {$id=$_post[' ID ']; $data= Model ("salesmanentity")->where ("sid =").$id),Select (); $this->ajaxreturn ($data, "JSON"); }     Public functionDoaddsalesuser () {$return=Array(' status ' = ' 0 ', ' data ' = ' Bind promotion account failed '); $uid= !Empty($_post[' UID '])?intval($_post[' UID ']) : 0;//Yonghuid//Var_dump ($UID);        $sid= !Empty($_post[' Sid '])?intval($_post[' Sid ']) : 0;//suoshuzuid//var_dump ($SID); Var_dump ($dataArray);        if(Empty($uid) ||Empty($sid)){            $return[' data '] = "Invalid!" "; Exit(Json_encode ($return)); }        //go to the Salesman_entity table to query the user group that the female ID belongs to        $dataArray= M (' salesman_entity ')->where ("uid=").$_post[' Sid ']) ->field ("Sid")Select (); //Var_dump ($dataArray);        $idss= Array_column ($dataArray, ' Sid '); //invite_id        $yqId=$idss[0]; //Female User ID        $user= Model (' User ')->where (' uid= ').$uid),find (); if($user[' invite_id ']>0){            $this->error ("The user has been bound! "); }        $datas=Array(' invite_id ' =$yqId, ' sid ' =$sid); //Start Binding        if(The model (' User ')->where (' uid= ').$uid)->setfield (' invite_id ',$yqId) && model (' User ')->where (' uid= ').$uid)->setfield (' Sid ',$sid)){            $return=Array(' status ' = 1, ' data ' = ' user bindings succeeded '); }        Exit(Json_encode ($return)); }

Thinkphp Two-level linkage