fix: Avoid locale-dependent ratio (#1536)

* fix: Avoid locale-dependent ratio

* Update filer/templatetags/filer_admin_tags.py

Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

* Add test for locale-independent sidebar image ratio formatting

* Use lowercase formatting

* Update GitHub Actions to use latest Ubuntu version

* Update furo package version in requirements.txt

---------

Co-authored-by: Fabian Braun <[email protected]>
Co-authored-by: sourcery-ai[bot] <58596630+sourcery-ai[bot]@users.noreply.github.com>

Author: 3 people

.github/workflows/frontend.yml

@@ -4,7 +4,7 @@ on: [push]
 
 jobs:
   gulp:
-    runs-on: ubuntu-20.04
+    runs-on: ubuntu-latest
     strategy:
       matrix:
         node-version: [16.20.x]

docs/requirements.txt

@@ -30,7 +30,7 @@ docutils==0.17.1
     # via
     #   restructuredtext-lint
     #   sphinx
-furo==2021.6.24b37
+furo==2025.7.19
     # via -r requirements.in
 idna==3.3
     # via requests

filer/templatetags/filer_admin_tags.py

@@ -190,7 +190,7 @@ def get_aspect_ratio_and_download_url(context, detail, file, height, width):
             # because they don't really have width or height
             if file.width:
                 width, height = 210, ceil(210 / file.width * file.height)
-                context['sidebar_image_ratio'] = file.width / 210
+                context['sidebar_image_ratio'] = '%.6f' % (file.width / 210)
     return height, width, context
 
 

tests/test_admin.py

@@ -1935,6 +1935,22 @@ def test_file_icon_with_size(self):
         self.assertNotIn('sidebar_image_ratio', context.keys())
         self.assertIn('download_url', context.keys())
 
+    def test_sidebar_image_ratio_format(self):
+        """
+        Test that sidebar_image_ratio is formatted as a string with 6 decimal places
+        to ensure consistent formatting regardless of locale settings
+        """
+        image = Image.objects.create(name='test.jpg')
+        image._width = 100
+        image._height = 200
+        image.save()
+        context = {}
+        height, width, context = get_aspect_ratio_and_download_url(context=context, detail=True, file=image, height=40, width=40)
+        self.assertIsInstance(context['sidebar_image_ratio'], str)
+        expected_ratio = '%.6f' % (image.width / 210)
+        self.assertEqual(context['sidebar_image_ratio'], expected_ratio)
+        self.assertEqual(context['sidebar_image_ratio'], '0.476190')
+
 
 class AdditionalAdminFormsTests(TestCase):
     def setUp(self):