我们删除要在分类模型中添加一个_before_delete的钩子函数，而且在删除一个分类时候，如果这个分类有子分类就不允许删除
model层代码如下所示：
<?php
namespace Admin\Model;
use Think\Model;
class CategoryModel extends Model{
protected $_validate = array(
//array(验证字段1,验证规则,错误提示,[验证条件,附加规则,验证时间]),
array('cate_name','require','栏目中文名不能为空！',1,'regex',3), //默认情况下用正则进行验证，
//这里的1是必须验证
//regex正则验证，定义的验证规则是一个正则表达式（默认）
//3全部情况下验证
array('cate_ename','require','栏目英文名不能为空！'), //默认情况下用正则进行验证
); //定义一个方法，获取树状的分类信息
public function catTree(){
$cats = $this->select();
//通过tree里面的方法进行排序
return $this->tree($cats);
} public function tree($arr,$pid=0,$level=0){ //$level是自己定义出来的
static $tree;
foreach($arr as $v){
if($v['cate_pid']==$pid){
//说明找到，保存
$v['level'] = $level;
$tree[] = $v;
//继续找
$this -> tree($arr,$v['cate_id'],$level+1); //这里的cate_id表的id
}
}
return $tree;
} //getSubIds函数的作用是获取一个分类所有子分类的id
public function getSubIds($cate_id){
//找所有分类
$data = $this -> select();
//递归找出所有子分类的id
return $this -> _getSubIds($data,$cate_id);
}
//递归查找
private function _getSubIds($data,$cate_pid,$isclear=false){
static $ret;
//因为每次调用他静态变量他都会追加，所以我们让他格式化一下
if($isclear){
$ret = array();
}
foreach($data as $k=>$v){
if($v['cate_pid'] == $cate_pid){
$ret[] = $v['cate_id'];
//再找这条分类的子分类
$this -> _getSubIds($data,$v['cate_id']);
}
}
return $ret;
} //_before_delete TP的钩子函数
protected function _before_delete($option){
//查询有没有子分类
$ck = $this -> getSubIds($option['where']['cate_id']);
if($ck){
$this -> error = "该栏目有子分类不能删除";
return false;
}
} }
然后我们就到控制器来完善下即可：
<?php
namespace Admin\Controller;
use Think\Controller;
class CategoryController extends Controller {
public function lists(){
$mod = D('Category')->catTree();
$this -> assign('mod',$mod);
$this->display();
} public function add(){
$cmod = D('Category');
if(IS_POST){
$data['cate_name'] = I('cate_name');
$data['cate_ename'] = I('cate_ename');
$data['cate_keywords'] = I('cate_keywords');
$data['cate_desc'] = I('cate_desc');
$data['cate_type'] = I('cate_type');
$data['cate_pid'] = I('cate_pid');
$data['cate_content'] = I('cate_content');
if($_FILES['cate_pic']['tmp_name']!=''){
$upload = new \Think\Upload();// 实例化上传类
$upload->maxSize = 3145728 ;// 设置附件上传大小
$upload->exts = array('jpg', 'gif', 'png', 'jpeg');// 设置附件上传类型
$upload->rootPath = './'; //这个一定要加否则很容易中招
$upload->savePath = 'Public/Uploads/'; // 设置附件上传目录
$info = $upload->uploadOne($_FILES['cate_pic']);
if($info){
//这里组装sql语句，让图片融入$data['pic']里面
$data['cate_pic'] = $info['savepath'].$info['savename'];
}else{
$this->error($upload->getError());
}
}
//dump($_FILES); if($cmod->create($data)){
if($cmod->add()){
$this->success('添加栏目成功',U('Category/lists'));
}else{
$this ->error('添加栏目失败');
}
}else{
$this -> error($cmod->getError());
} return;
} //因为我们在上面用了大D已经实例化对象了，所以直接以这种方式进行取出
$cateres = D('Category')->catTree();
$this -> assign('cateres',$cateres);
$this -> display();
} public function edit(){
$id = I('cate_id');
$vo = M('Category')->find($id);
$this -> assign('vo',$vo);
//栏目列表的遍历 开始
$cat = D('Category')->catTree();
$this -> assign('cat',$cat);
//栏目列表的遍历 结束
//dump($cat); //主要作用是用来查取下级分类的 开始
$catemod = D('Category');
//取出当前分类所有子分类的id
$cates = $catemod->getSubIds($id);
//将当前分类和子分类放到一起
$cates[] = $id;
$this -> assign('cates',$cates);
//下级分类查取 结束 //dump($cates);
if(IS_POST){
$data['cate_id'] = I('cate_id');
$data['cate_name'] = I('cate_name');
$data['cate_ename'] = I('cate_ename');
$data['cate_keywords'] = I('cate_keywords');
$data['cate_desc'] = I('cate_desc');
$data['cate_type'] = I('cate_type');
$data['cate_pid'] = I('cate_pid');
$data['cate_content'] = I('cate_content');
if($_FILES['cate_pic']['tmp_name']!=''){
$upload = new \Think\Upload();// 实例化上传类
$upload->maxSize = 3145728 ;// 设置附件上传大小
$upload->exts = array('jpg', 'gif', 'png', 'jpeg');// 设置附件上传类型
$upload->rootPath = './'; //这个一定要加否则很容易中招
$upload->savePath = 'Public/Uploads/'; // 设置附件上传目录
$info = $upload->uploadOne($_FILES['cate_pic']);
if($info){
//删除原来的图片
$cp = M('Category')->find($id);
unlink($cp['cate_pic']);
// 上传成功 获取上传文件信息
//这里组装sql语句，让图片融入$data['pic']里面
$data['cate_pic'] = $info['savepath'].$info['savename'];
}else{
$this->error($upload->getError());
}
} $mod =D("Category");
if($mod-> create($data)){
if($mod->save()){
$this->success('修改栏目成功',U('Category/lists'));
}else{
$this ->error('修改栏目失败');
}
}else{
$this->error($brandModel->getError());
}
}
$this->display();
} public function del(){
$mod = D("Category");
if($mod->delete(I('get.cate_id',0)) !== false){
$this -> success("删除成功",U('Category/lists'));
}else{
$this -> error($mod->getError());
}
}
}
视图那就简单多啦，只需要在删除那里发送yigecate_id过来即可：
<!doctype html>
<html>
<head>
<meta charset="UTF-8">
<title>后台管理</title>
<link rel="stylesheet" type="text/css" href="__PUBLIC__/Admin/css/common.css"/>
<link rel="stylesheet" type="text/css" href="__PUBLIC__/Admin/css/main.css"/>
<script type="text/javascript" src="__PUBLIC__/Admin/js/libs/modernizr.min.js"></script>
<script type="text/javascript" src="__PUBLIC__/Admin/js/jq18m.js"></script>
<script type="text/javascript" src="__PUBLIC__/Admin/js/hileft.js"></script>
</head>
<body> <include file="Public/header" /> <div class="container clearfix">
<include file="Public/left" />
<!--/sidebar-->
<div class="main-wrap"> <div class="crumb-wrap">
<div class="crumb-list"><i class="icon-font"></i><a href="/jscss/admin">首页</a><span class="crumb-step">></span><span class="crumb-name">作品管理</span></div>
</div>
<div class="search-wrap">
<div class="search-content">
<form action="/jscss/admin/design/index" method="post">
<table class="search-tab">
<tr>
<th width="120">选择分类:</th>
<td>
<select name="search-sort" id="">
<option value="">全部</option>
<option value="19">精品界面</option><option value="20">推荐界面</option>
</select>
</td>
<th width="70">关键字:</th>
<td><input class="common-text" placeholder="关键字" name="keywords" value="" id="" type="text"></td>
<td><input class="btn btn-primary btn2" name="sub" value="查询" type="submit"></td>
</tr>
</table>
</form>
</div>
</div>
<div class="result-wrap">
<form name="myform" id="myform" method="post" action="__CONTROLLER__/">
<div class="result-title">
<div class="result-list">
<a href="insert.html"><i class="icon-font"></i>新增作品</a>
<a id="batchDel" href="javascript:void(0)"><i class="icon-font"></i>批量删除</a>
<a id="updateOrd" href="javascript:void(0)"><i class="icon-font"></i>更新排序</a>
</div>
</div>
<div class="result-content">
<table class="result-tab" width="100%">
<tr> <th>栏目id</th>
<th>栏目中文名称</th>
<th>栏目英文名称</th>
<th>栏目图片</th>
<th>上级栏目</th>
<th>栏目类型</th>
<th>操作</th>
</tr>
<volist name="mod" id="vo">
<tr> <td>{$vo['cate_id']}</td>
<td>{$vo['level']|str_repeat="▲ ",###} {$vo['cate_name']}</td>
<td>{$vo['cate_ename']}</td>
<if condition="$vo['cate_pic'] eq ''">
<td>抱歉目前没有图片数据</td>
<else />
<td><img src="/{$vo['cate_pic']}" width="100" height="60"></td>
</if>
<td>{$vo['cate_pid']}</td>
<if condition="$vo['cate_type'] eq 0">
<td>封面栏目</td>
<elseif condition="$vo['cate_type'] eq 1" />
<td>列表栏目</td>
<elseif condition="$vo['cate_type'] eq 2" />
<td>产品栏目</td>
</if>
<td>
<a class="link-update" href="__MODULE__/Category/edit/cate_id/{$vo['cate_id']}">修改</a>
<a class="link-del" href="__MODULE__/Category/del/cate_id/{$vo['cate_id']}"
onclick="return confirm('您确定要删除该栏目么？');" >删除</a>
</td>
</tr>
</volist>
</table>
<input type="submit" name="" value="删除" style="margin-left: 45px; margin-top: 10px;">
<div class="list-page"> 2 条 1/1 页</div>
</div>
</form>
</div>
</div>
<!--/main-->
<script>
//在 jq 1.8.3测试成功
$("#selall").click(function(){
if($(this).attr("checked")){
$('.selall').attr("checked","checked");
}else{
$('.selall').removeAttr("checked");
}
});
</script>
</div>
</body>
</html>