Ticket #16946: 16946.with-test.diff

django/core/files/base.py

@@ -36 +36 @@
         if not hasattr(self, '_size'):
             if hasattr(self.file, 'size'):
                 self._size = self.file.size
-            elif os.path.exists(self.file.name):
-                self._size = os.path.getsize(self.file.name)
+            elif self.name and os.path.exists(self.name):
+                self._size = os.path.getsize(self.name)
             else:
                 raise AttributeError("Unable to determine the file's size.")
         return self._size

tests/modeltests/files/tests.py

@@ -2 +2 @@
 
 import shutil
 import tempfile
+try:
+    from cStringIO import StringIO
+except ImportError:
+    from StringIO import StringIO
 
 from django.core.cache import cache
 from django.core.files import File
@@ -114 +118 @@
             self.assertFalse(f.closed)
         self.assertTrue(f.closed)
         self.assertTrue(orig_file.closed)
+
+    def test_file_with_no_name_size(self):
+        # https://code.djangoproject.com/ticket/16946
+        file = File(StringIO('A file with no name'))
+        self.assertRaises(AttributeError, lambda : file.size)