diff --git a/application/admin/controller/general/Attachment.php b/application/admin/controller/general/Attachment.php
index 02b0ce46..a9b79bbc 100644
--- a/application/admin/controller/general/Attachment.php
+++ b/application/admin/controller/general/Attachment.php
@@ -41,7 +41,8 @@ class Attachment extends Backend
                     ->order($sort, $order)
                     ->limit($offset, $limit)
                     ->select();
-            $cdnurl = preg_replace("/\/(\w+)\.php$/i", '', $this->request->root());
+            //$cdnurl = preg_replace("/\/(\w+)\.php$/i", '', $this->request->root());
+            $cdnurl=$this->view->config['upload']['cdnurl'];
             foreach ($list as $k => &$v)
             {
                 $v['fullurl'] = ($v['storage'] == 'local' ? $cdnurl : $this->view->config['upload']['cdnurl']) . $v['url'];
diff --git a/application/admin/controller/posts/Archives.php b/application/admin/controller/posts/Archives.php
index 44d2f2a6..973ca837 100644
--- a/application/admin/controller/posts/Archives.php
+++ b/application/admin/controller/posts/Archives.php
@@ -2,16 +2,13 @@
 
 namespace app\admin\controller\posts;
 
-use app\admin\model\Channel;
 use app\common\controller\Backend;
-
 use think\Hook;
 use think\Session;
 use fast\Tree;
 use seven\Seven;
 use app\admin\model\PostsModelx as Modelx;
 use app\common\model\Counter;
-use app\admin\model\Sites;
 
 /**
  * 文档管理
@@ -54,7 +51,7 @@ class Archives extends Backend
     {
         $where=$first_siteid='';
         if ($this->auth->isSuperAdmin()) {
-            $sitelist = model('Sites')->all();
+            $sitelist = \app\admin\model\Sites::all();
             $this->view->assign('siteList', $sitelist);
 
             //记住下拉列表中第一个网站的ID，添加文章时，只读取对应的栏目等信息
diff --git a/application/admin/controller/posts/Channel.php b/application/admin/controller/posts/Channel.php
index 669212c1..998979c9 100644
--- a/application/admin/controller/posts/Channel.php
+++ b/application/admin/controller/posts/Channel.php
@@ -6,7 +6,6 @@ use app\common\controller\Backend;
 use fast\Tree;
 use think\Hook;
 use seven\Seven;
-use app\admin\model\Sites;
 use think\Session;
 
 /**
@@ -34,7 +33,7 @@ class Channel extends Backend
     {
         $first_siteid=null;
         if ($this->auth->isSuperAdmin()){
-            $sitelist = Sites::all();
+            $sitelist = \app\admin\model\Sites::all();;
             $this->view->assign('siteList', $sitelist);
             if ($sitelist && $this->request->action()=='add') {
                 $first_siteid = $sitelist[0]['id'] ;
@@ -122,7 +121,7 @@ class Channel extends Backend
             return json($result);
         }
         if ($this->auth->isSuperAdmin()){
-            $sitelist = Sites::all();
+            $sitelist = \app\admin\model\Sites::all();;
             $this->view->assign('siteList', $sitelist);
         }
         $this->assignconfig('show_sitename', $this->auth->isSuperAdmin());
diff --git a/application/admin/controller/posts/Page.php b/application/admin/controller/posts/Page.php
index ed8cb9c9..7eea04c8 100644
--- a/application/admin/controller/posts/Page.php
+++ b/application/admin/controller/posts/Page.php
@@ -6,7 +6,6 @@ use app\common\controller\Backend;
 
 use think\Hook;
 use seven\Seven;
-use app\admin\model\Sites;
 
 /**
  * 单页管理
@@ -71,7 +70,7 @@ class Page extends Backend
     {
         $first_siteid=null;
         if ($this->auth->isSuperAdmin()){
-            $sitelist = Sites::all();
+            $sitelist = \app\admin\model\Sites::all();;
             $this->view->assign('siteList', $sitelist);
             $first_siteid=$sitelist?$sitelist[0]['id']:$first_siteid;
         }
diff --git a/application/admin/model/Sites.php b/application/admin/model/Sites.php
index 876153cc..043fdb25 100644
--- a/application/admin/model/Sites.php
+++ b/application/admin/model/Sites.php
@@ -1,16 +1,9 @@
 <?php
-/**
- * @desc: Created by PhpStorm.
- * @Author: Dr.Xing <ezfwork@foxmail.com>
- * @Since: 2018/2/5 15:37
- */
 
 namespace app\admin\model;
 
 
-use think\Model;
-
-class Sites extends Model
+class Sites extends \app\common\model\Sites
 {
 
 }
\ No newline at end of file
diff --git a/application/common/model/Attachment.php b/application/common/model/Attachment.php
index 79878c6d..43c487d7 100644
--- a/application/common/model/Attachment.php
+++ b/application/common/model/Attachment.php
@@ -16,6 +16,12 @@ class Attachment extends Model
     protected $type = [
     ];
 
+    protected function base(&$query){
+        if(\think\Session::has("user_site_id")) {
+            $query->where(['site_id' =>\think\Session::get("user_site_id")]);
+        }
+    }
+
     public function setUploadtimeAttr($value)
     {
         return strtotime($value);
diff --git a/extend/seven/behavior/TakeAttach.php b/extend/seven/behavior/TakeAttach.php
new file mode 100644
index 00000000..c6b88826
--- /dev/null
+++ b/extend/seven/behavior/TakeAttach.php
@@ -0,0 +1,33 @@
+<?php
+/**
+ * @desc: 上传附件时，自动保存站点ID
+ * @Author: Dr.Xing <ezfwork@foxmail.com>
+ * @Since: 2018/2/9 19:58
+ */
+
+namespace seven\behavior;
+
+
+class TakeAttach
+{
+    public function run(&$params)
+    {
+        //upload
+        if ($params instanceof \think\Model) {
+            if(\think\Session::has('user_site_id')) {
+                $params->site_id = \think\Session::get('user_site_id');
+                $params->save();
+                return;
+            }
+        }
+        //del
+        elseif ($params instanceof \think\Controller) {
+            //$attId = request()->param('ids');
+        }
+        //unknow
+        else {
+
+        }
+    }
+
+}
\ No newline at end of file