diff --git a/application/common/model/Attachment.php b/application/common/model/Attachment.php
index 2149aec71ebe826ec689dda2b745156c7ec534fa..21fe292d2e6a4a6aad68d850ec1e1935a55885ee 100644
--- a/application/common/model/Attachment.php
+++ b/application/common/model/Attachment.php
@@ -25,7 +25,7 @@ class Attachment extends Model
     {
         // 如果已经上传该资源，则不再记录
         self::beforeInsert(function ($model) {
-            if (self::where('url', '=', $model['url'])->find()) {
+            if (self::where('sha1', '=', $model['sha1'])->find()) {
                 return false;
             }
         });