public function deltag($recordId){      
    
      $condition['recordId'] = $recordId;//獲取日記的ID
          
     $tagged=M('Tagged');
     $taggedlist= $tagged->where($condition)->select();//這里用select而不用find,因為一篇日記可能有多個標簽
            
   $taggedids=array();//聲明一個數(shù)組，用來裝think_tagged表的ID
            
    $tagIds=array();//聲明一個數(shù)組，用來裝think_tag表的ID
            
    foreach ($taggedlist as $key => $value) {
            
   $tagIds[]=$value['tagId'];//獲取think_tag表的ID
                   
   $taggedids[]=$value['id'];//獲取think_tagged表的ID
               }
 //考慮到一篇日記可能有多個標簽,所以這里對$tagIds作一下遍歷
  foreach ($tagIds as $tagIdk => $tagIdv) {
            
   $tagId=$tagIdv;  
                  
   $tag=D('Tag');
                   
   $tagvo=$tag->where('id='.$tagId)->find();//獲取每個$tagId對應的一條記錄
           
  $count=intval($tagvo['count']);//獲取標簽的數(shù)量
           
  if($count==1){//如果$count==1，說明這個標簽僅有這篇日記所有，刪掉。
                   
  $tag->where('id='.$tagId)->delete();
                    
  }elseif($count > 1){//$count > 1，說明這個標簽為多篇日記所有，不能刪除，所以減1。
                 
  $tag->where('id='.$tagId)->setDec('count',1);//setDec使$count減1,注意thinkphp3.1的使用方法。
                
   }
 }
 //下面是刪除日記存在think_tagged表里的相關數(shù)據(jù)
   foreach ($taggedids as $taggedid_k => $taggedid_v) {
              
    $tagged->where('id='.$taggedid_v)->delete();
                   
    }
}

public function delete() {
        //刪除指定記錄
        $model = M("Blog");
        if (!empty($model)) {
            $id = $_REQUEST[$model->getPk()];
            if (isset($id)) {
 
                if ($model->where("id=" . $id)->delete()) {
                    if ($this->__get('ajax')) {
                        $this->ajaxReturn($id, L('_DELETE_SUCCESS_'), 1);
                    } else {
                        $this->success(L('_DELETE_SUCCESS_'));
                    }
                } else {
                    $this->error(L('_DELETE_FAIL_'));
                }
            } else {
                $this->error(L('_ERROR_ACTION_'));
            }
        }
}

public function delete() {
 //刪除指定記錄
 $model = M("Blog");
 if (!empty($model)) {
     $id = $_REQUEST[$model->getPk()];
     if (isset($id)) {
     $recordId=$id;
      $this->deltag($recordId);
  if ($model->where("id=" . $id)->delete()) {
      if ($this->__get('ajax')) {
   $this->ajaxReturn($id, L('_DELETE_SUCCESS_'), 1);
      } else {
   $this->success(L('_DELETE_SUCCESS_'));
      }
  } else {
      $this->error(L('_DELETE_FAIL_'));
  }
     } else {
  $this->error(L('_ERROR_ACTION_'));
     }
 }
}