From cae8db6a25529359dbf7d687594acc40c3af9572 Mon Sep 17 00:00:00 2001
From: vangheem <vangheem@gmail.com>
Date: Thu, 1 Mar 2018 14:36:22 -0500
Subject: [PATCH] Store record of previous file data on upload

---
 CHANGELOG.rst              |  3 ++-
 guillotina/files/dbfile.py | 10 ++++++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/CHANGELOG.rst b/CHANGELOG.rst
index 9ff879fed..d7544efbc 100644
--- a/CHANGELOG.rst
+++ b/CHANGELOG.rst
@@ -1,7 +1,8 @@
 2.3.30 (unreleased)
 -------------------
 
-- Nothing changed yet.
+- Store record of previous file data on upload
+  [vangheem]
 
 
 2.3.29 (2018-03-01)
diff --git a/guillotina/files/dbfile.py b/guillotina/files/dbfile.py
index 758dd2cb5..be13f9574 100644
--- a/guillotina/files/dbfile.py
+++ b/guillotina/files/dbfile.py
@@ -6,6 +6,8 @@
 from guillotina.interfaces import IFileCleanup
 from zope.interface import implementer
 
+import uuid
+
 
 @implementer(IDBFile)
 class DBFile(BaseCloudFile):
@@ -19,6 +21,13 @@ def valid(self):
 
     async def init_upload(self, context):
         context._p_register()
+
+        self._old_uri = self.uri
+        self._old_size = self.size
+        self._old_filename = self.filename
+        self._old_md5 = self.md5
+        self._old_content_type = self.guess_content_type()
+
         self._current_upload = 0
         if self._blob is not None:
             cleanup = IFileCleanup(context, None)
@@ -28,6 +37,7 @@ async def init_upload(self, context):
             else:
                 self._previous_blob = self._blob
         blob = Blob(context)
+        self._uri = uuid.uuid4().hex
         self._blob = blob
 
     async def append_data(self, context, data):