django-upgrade fixes

Author: fsbraun

filer/server/backends/default.py

@@ -24,7 +24,7 @@ def serve(self, request, filer_file, **kwargs):
         # Respect the If-Modified-Since header.
         statobj = os.stat(fullpath)
         response_params = {'content_type': filer_file.mime_type}
-        if not was_modified_since(request.META.get('HTTP_IF_MODIFIED_SINCE'),
+        if not was_modified_since(request.headers.get('if-modified-since'),
                                   statobj[stat.ST_MTIME]):
             return HttpResponseNotModified(**response_params)
         response = HttpResponse(open(fullpath, 'rb').read(), **response_params)

tests/helpers.py

@@ -25,7 +25,7 @@ def create_folder_structure(depth=2, sibling=2, parent=None):
         depth_range.reverse()
         for d in depth_range:
             for s in range(1, sibling + 1):
-                name = "folder: {} -- {}".format(str(d), str(s))
+                name = f"folder: {str(d)} -- {str(s)}"
                 folder = Folder(name=name, parent=parent)
                 folder.save()
                 create_folder_structure(depth=d - 1, sibling=sibling, parent=folder)

tests/test_models.py

@@ -87,7 +87,7 @@ def test_create_icons(self):
         self.assertEqual(len(icons), len(filer_settings.FILER_ADMIN_ICON_SIZES))
         for size in filer_settings.FILER_ADMIN_ICON_SIZES:
             self.assertEqual(os.path.basename(icons[size]),
-                             file_basename + '__{}x{}_q85_crop_subsampling-2_upscale.jpg'.format(size, size))
+                             file_basename + f'__{size}x{size}_q85_crop_subsampling-2_upscale.jpg')
 
     def test_access_icons_property(self):
         """Test IconsMixin that calls static on a non-existent file"""

tests/utils/test_app/admin.py

@@ -3,8 +3,6 @@
 from .models import MyModel
 
 
+@admin.register(MyModel)
 class MyModelAdmin(admin.ModelAdmin):
     model = MyModel
-
-
-admin.site.register(MyModel, MyModelAdmin)