ThinkPHP5:[二级联动与二级分类]

二级联动

数据表

静态

<div class="layui-form-item">
    <label for="username" class="layui-form-label">
    <span class="x-red">*</span>商品分类</label>
    <div class="layui-input-inline">
    	<select name="pid" id="pid">
		<option value ="">请选择分类</option>
        	{
     foreach $sql as $vo}
        		<option> value ="{$vo.id}">{
     $vo.class}</option>
        	{
     /foreach}
        </select>
		<select name="class" id="class1">
			<option value ="0">请选择</option>
		</select>
    </div>
</div>

jQuery

<script>
	$(function(){
     
		$("#pid").change(function(){
     
			var  pid=$('#pid').val();
		
			$("#class1").empty();        //清除原有的值 不然会一直重复
			$.ajax({
     
				async:true,
			    type:"post",
			    url:"{:url('Commlist/ceshi')}",
			    data:{
     spid:pid},
			    dataType:"json",
			    success:function(data){
     
				console.log(data);
				var i;
				for (i = 0; i < data.length; i++) {
     
					$("#class1").append(""+data[i].class+"");
				}
			    }
			});
		});
	})
</script>

控制器

	public function brandadd()
	{
     
		$db=db('class')->where('pid',0)->select(); //一级
	
		
		$id=input('spid');	
		// var_dump($id);
		// dump($db);
		$time=db('class')->where('pid',$id)->select();  //二级 
		$this->assign('sql',$db);//一级
		$this->assign('sqll',$time); //二级 
		return $this->fetch('commodity/brand/brandadd');
	}
	/* 二级下拉 */
	public function ceshi()
	{
     
		$id=input('spid');	
		$time=db('class')->where('pid',$id)->select();
        return $time;
	}

二级分类

数据表

静态

<div class="layui-form-item">
	<label for="username" class="layui-form-label">
		<span class="x-red">*</span>上级分类</label>
	<select name="topclass" required="" style="margin-top: 10px;">
	<option value="0">上级分类</option>
		{
     foreach $class_list as $v}
				<option value="{$v.id}">{
     $v.name}</option>
			{
     foreach $v.item as $vs}
				<option value="{$vs.id}">——{
     $vs.name}</option>
			{
     /foreach}
		{
     /foreach}
	</select>
</div>

控制器

$class_list= db('topclass')->field(array('id', 'name'))->where(array('pid'=>0))->select();
	foreach($class_list as $k=>$v){
      
		$time=db('topclass')->where(array('pid'=>$v['id']))->select(); 
		$class_list[$k]['item']=$time;
	}
	$this->assign('class_list', $class_list);