夺命雷公狗ThinkPHP项目之----企业网站11之栏目的删除完成

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">&gt;</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="▲&nbsp;&nbsp;&nbsp;",###} {$vo['cate_name']}</td>
                            <td>{$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>