[1.11.x] Fixed #28242 -- Moved ImageField file extension validation to the form field.

Backport of a0c07d77fc313388c72a17cd59411265069f037f from master

2 files changed, 30 insertions, 1 deletions

diff --git a/tests/model_forms/models.py b/tests/model_forms/models.py
index f873cfea97..42224ac63e 100644
--- a/tests/model_forms/models.py
+++ b/tests/model_forms/models.py
@@ -214,6 +214,17 @@ try:
 
         def __str__(self):
             return self.description
+
+    class NoExtensionImageFile(models.Model):
+        def upload_to(self, filename):
+            return 'tests/no_extension'
+
+        description = models.CharField(max_length=20)
+        image = models.ImageField(storage=temp_storage, upload_to=upload_to)
+
+        def __str__(self):
+            return self.description
+
 except ImportError:
     test_images = False
 
diff --git a/tests/model_forms/tests.py b/tests/model_forms/tests.py
index 159d0634ea..fe9a153a90 100644
--- a/tests/model_forms/tests.py
+++ b/tests/model_forms/tests.py
@@ -36,7 +36,7 @@ from .models import (
 )
 
 if test_images:
-    from .models import ImageFile, OptionalImageFile
+    from .models import ImageFile, OptionalImageFile, NoExtensionImageFile
 
     class ImageFileForm(forms.ModelForm):
         class Meta:
@@ -48,6 +48,11 @@ if test_images:
             model = OptionalImageFile
             fields = '__all__'
 
+    class NoExtensionImageFileForm(forms.ModelForm):
+        class Meta:
+            model = NoExtensionImageFile
+            fields = '__all__'
+
 
 class ProductForm(forms.ModelForm):
     class Meta:
@@ -2469,6 +2474,19 @@ class FileAndImageFieldTests(TestCase):
         self.assertEqual(instance.image.name, 'foo/test4.png')
         instance.delete()
 
+        # Editing an instance that has an image without an extension shouldn't
+        # fail validation. First create:
+        f = NoExtensionImageFileForm(
+            data={'description': 'An image'},
+            files={'image': SimpleUploadedFile('test.png', image_data)},
+        )
+        self.assertTrue(f.is_valid())
+        instance = f.save()
+        self.assertEqual(instance.image.name, 'tests/no_extension')
+        # Then edit:
+        f = NoExtensionImageFileForm(data={'description': 'Edited image'}, instance=instance)
+        self.assertTrue(f.is_valid())
+
 
 class ModelOtherFieldTests(SimpleTestCase):
     def test_big_integer_field(self):