diff --git a/routes/upload.js b/routes/upload.js
index 51a7c49..cce099a 100644
--- a/routes/upload.js
+++ b/routes/upload.js
@@ -37,7 +37,13 @@ router.post('/upLoadDoc',uploaddemo, async (ctx, next) => {
     category:category,
     path:'http://localhost:10000/'+ctx.req.file.originalname
   }
-  let attachment = await attachmentModel.create(attachmentData)
+  let oldAttachment = await attachmentModel.findOne({where:{businessId:businessId}})
+
+  if(oldAttachment){
+    let oldAttachment = await attachmentModel.update({path:'http://localhost:10000/'+ctx.req.file.originalname},{where:{businessId:businessId}})    
+  }else{
+    let attachment = await attachmentModel.create(attachmentData)    
+  }
   ctx.response.status= 200;    
   ctx.body = {  
       fileUrl:'http://localhost:10000/'+ctx.req.file.originalname
diff --git a/views/index.html b/views/index.html
index cabf04b..fe10011 100644
--- a/views/index.html
+++ b/views/index.html
@@ -7,7 +7,7 @@
     <script src="http://cdn.bootcss.com/jquery/2.0.0/jquery.min.js"></script>  
 </head>    
 <body>    
-    <form action="/upload/upLoadDoc?businessId=1&category=1" method="post" enctype="multipart/form-data">  
+    <form action="/upload/upLoadDoc?businessId=0aJeQOYgLAo5yB1mE14Rvzb69V7mpZKD&category=1" method="post" enctype="multipart/form-data">  
         <input type="file" name="file"/>  
         <input type="text" value="1212" name="class" > 
         <input type="submit" value="ok"/>