public function add()
 {
     if (is_login()) {
         $this->user_addauth();
         $category_id = I('post.category_id');
         $model_id = I('post.model_id');
         empty($category_id) && $this->error('请选择要发布的分类不能为空!');
         empty($model_id) && $this->error('该分类木有绑定模型!');
         //获取参数
         $category = D('Category')->info($category_id);
         //检查该分类是否允许发布
         //$allow_publish = D('Document')->checkCategory($cate_id);
         $category['allow_publish'] != 2 && $this->error('该分类不允许发布内容!');
         /* 保存文档内容 */
         if (!empty($_POST['pics'])) {
             $imglist = '';
             foreach ($_POST['pics'] as $key => $value) {
                 $imglist .= '<img src="' . $this->base64pic($value, $category['name']) . '">';
             }
             $_POST['content'] = $_POST['content'] . $imglist;
             unset($_POST['pics']);
         }
         $Document = D('Document');
         $status = $Document->update();
         if ($status) {
             $uid = session('user_auth.uid');
             Credits::ag_cms_topics_add($uid, $category['id'], '发布了一条内容,ID:' . $status['id']);
             $this->success('发布成功!', U('Article/lists?category=' . $category['name']));
         } else {
             $this->error($Document->getError());
         }
     } else {
         $this->error('登陆后才能发表哦~');
     }
 }