From c0c5b6620dae237867f9382eb6084711b1e22c56 Mon Sep 17 00:00:00 2001
From: Jakub K <jakub.kacur@gmail.com>
Date: Wed, 4 Sep 2019 16:06:40 +0200
Subject: [PATCH] SFTPStorage: Fix reopen file

Default Django implementation uses os.path.exists and open(), which is wrong.
---
 storages/backends/sftpstorage.py | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/storages/backends/sftpstorage.py b/storages/backends/sftpstorage.py
index a5dc4dce3..27c276ee8 100644
--- a/storages/backends/sftpstorage.py
+++ b/storages/backends/sftpstorage.py
@@ -219,6 +219,14 @@ def write(self, content):
         self._is_dirty = True
         self._is_read = True
 
+    def open(self, mode=None):
+        if not self.closed:
+            self.seek(0)
+        elif self.name and self._storage.exists(self.name):
+            self.file = self._storage._open(self.name, mode or self.mode)
+        else:
+            raise ValueError("The file cannot be reopened.")
+
     def close(self):
         if self._is_dirty:
             self._storage._save(self.name, self)