卡了很久，一直排查不出错误。函数和js处理感觉没有写错，模板处理也很正常，但是get到的id一直都是0

public function getCityByParentId( $parentId=0) {
$data = [
'status' => 1,
'parent_id' => $parentId,
];
$order = [
'id'=> 'desc',
];
//echo $this->getLastSql();
return $this->where($data)
->order($order)
->select();
}

js部分

/*  城市相关的二级内容
 */
$(".cityId").change(function(){
	city_id = $(this).val();
	url = SCOPE.city_url;
	postData = {'id':'city_id'};
	$.post(url , postData, function(result){
		//相关的业务处理
		if (result.status == 1 ) {
			//将信息填充到html
			data = result.data;					//赋值变量
			city_html = "";
			$(data).each(function(i) {			//遍历
				city_html +="<option value='"+this.id+"''>"+this.name+"</option>";
			});
			$('.se_city_id').html(city_html);
		} else if(result.status == 0) {
			alert(result.message);
			console.log(result.message);
			return ;
		}
	}, 'json');
 });
/*  分类相关的二级内容
 */
$(".categoryId").change(function(){
	category_id = $(this).val();
	url = SCOPE.category_url;
	postData = {'id':'category_id'};
	$.post(url , postData, function(result){
		//相关的业务处理
		if (result.status == 1 ) {
			//将信息填充到html
			data = result.data;					//赋值变量
			category_html = "";
			$(data).each(function(i) {
				category_html += '<input name="se_category_id[]" type="checkbox" id="checkbox-moban" value = "'+this.id+'"/>' +this.name;
				category_html += '<lable for="checkbox-moban">&nbsp;</lable>';
			})
			$('.se_category_id').html(category_html);
		} else if(result.status == 0) {
			$('.se_category_id').html('');
		}
	}, 'json');
 });

<!--包含头部文件-->
{include file="public/header" /}
<div class="cl pd-5 bg-1 bk-gray mt-20"> <h1>商户入驻申请</h1></div>
<article class="page-container">
	<form class="form form-horizontal"  method="post" action="{:url('Register/add')}">
	基本信息：
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2"><span class="c-red">*</span>商户名称：</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="name">
			</div>
		</div>
		
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2"><span class="c-red">*</span>所属城市：</label>
			<div class="formControls col-xs-8 col-sm-2"> 
				<span class="select-box">
				<select name="city_id" class="select cityId">
					
					{volist name = "citys" id ="vo"}
						<option value="{$vo.id}">	{$vo.name}</option>
					{/volist}
				</select>
				</span>
			</div>
			<div class="formControls col-xs-8 col-sm-2">
				<span class="select-box">
				<select name="se_city_id" class="select se_city_id">
					<option value="0">--请选择--</option>
				</select>
				</span> 
			</div>
		</div>
		
		<div class="row cl">
              <label class="form-label col-xs-4 col-sm-2">缩略图：</label>
              <div class="formControls col-xs-8 col-sm-9">
                <input id="file_upload"  type="file" multiple="true" >
                <img style="display: none" id="upload_org_code_img" src="" width="150" height="150">
                <input id="file_upload_image" name="logo" type="hidden" multiple="true" value="">
              </div>
        </div>
        <div class="row cl">
              <label class="form-label col-xs-4 col-sm-2">营业执照：</label>
              <div class="formControls col-xs-8 col-sm-9">
                <input id="file_upload_other"  type="file" multiple="true" >
                <img style="display: none" id="upload_org_code_img_other" src="" width="150" height="150">
                <input id="file_upload_image_other" name="licence_logo" type="hidden" multiple="true" value="">
              </div>
        </div>
        
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">商户介绍：</label>
			<div class="formControls col-xs-8 col-sm-9"> 
				<script id="editor1"  type="text/plain" name="description" style="width:80%;height:300px;"></script> 
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">银行账号:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="bank_info">
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">开户行名称:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="bank_name">
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">开户行姓名:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="bank_user">
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">法人:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="faren">
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">法人电话:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="faren_tel">
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2"><span class="c-red">*</span>邮箱：</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="email">
			</div>
		</div>
		总店信息：
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">电话:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="tel">
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">联系人:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="contact">
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2"><span class="c-red">*</span>所属分类：</label>
			<div class="formControls col-xs-8 col-sm-3"> <span class="select-box">
				<select name="category_id" class="select categoryId">
					<option value="0">--请选择--</option>
					{volist name = "category" id="vo"}
					<option value="{$vo.id}">{$vo.name}</option>
					{/volist}
				</select>
				</span> 
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">所属子类：</label>
			<div class="formControls col-xs-8 col-sm-3 skin-minimal">
				<div class="check-box se_category_id">
				</div>
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">商户地址：</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="address">
			</div>
			<a  class="btn btn-default radius ml-10 maptag">标注</a>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">营业时间:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="open_time">
			</div>
		</div>
		
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">门店简介：</label>
			<div class="formControls col-xs-8 col-sm-9"> 
				<script id="editor"  type="text/plain" name="content" style="width:80%;height:300px;"></script> 
			</div>
		</div>
		账号信息：
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">用户名:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="text" class="input-text" value="" placeholder="" id="" name="username">
			</div>
		</div>
		<div class="row cl">
			<label class="form-label col-xs-4 col-sm-2">密码:</label>
			<div class="formControls col-xs-8 col-sm-3">
				<input type="password" class="input-text" value="" placeholder="" id="" name="password">
			</div>
		</div>
		
		<div class="row cl">
			<div class="col-xs-8 col-sm-9 col-xs-offset-4 col-sm-offset-2">
				<button  class="btn btn-primary radius" type="submit"><i class="Hui-iconfont">&#xe632;</i> 申请</button>	
			</div>
		</div>
	</form>
</article>
<!--包含尾部文件-->
{include file="public/footer" /}
<script type="text/javascript" src="__STATIC__/admin/hui/lib/ueditor/1.4.3/ueditor.config.js"></script>
<script type="text/javascript" src="__STATIC__/admin/hui/lib/ueditor/1.4.3/ueditor.all.min.js"> </script>
<script type="text/javascript" src="__STATIC__/admin/hui/lib/ueditor/1.4.3/lang/zh-cn/zh-cn.js"></script>
<script>
	var SCOPE = {
		'city_url'      : '{:url('api/city/getCitysByParentId')}',
		'category_url'  : '{:url('api/category/getCategoryByParentId')}',
		'uploadify_swf' : '__STATIC__/admin/uploadify/uploadify.swf',
		'image_upload'  : '{:url('api/image/upload')}',
	};
</script>
<!--分配编辑器-->
<script>
$(function(){
	var ue = UE.getEditor('editor');
	var ue1 = UE.getEditor('editor1');
});
</script>
</body>
</html>

页面部分