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

Backport of a0c07d77fc313388c72a17cd59411265069f037f from master

2 files changed, 1 insertions, 2 deletions

diff --git a/django/db/models/fields/files.py b/django/db/models/fields/files.py
index e877fc7ef4..6906b8f485 100644
--- a/django/db/models/fields/files.py
+++ b/django/db/models/fields/files.py
@@ -8,7 +8,6 @@ from django.core import checks
 from django.core.files.base import File
 from django.core.files.images import ImageFile
 from django.core.files.storage import default_storage
-from django.core.validators import validate_image_file_extension
 from django.db.models import signals
 from django.db.models.fields import Field
 from django.utils import six
@@ -387,7 +386,6 @@ class ImageFieldFile(ImageFile, FieldFile):
 
 
 class ImageField(FileField):
-    default_validators = [validate_image_file_extension]
     attr_class = ImageFieldFile
     descriptor_class = ImageFileDescriptor
     description = _("Image")
diff --git a/django/forms/fields.py b/django/forms/fields.py
index 168ea9673c..33ed2882a3 100644
--- a/django/forms/fields.py
+++ b/django/forms/fields.py
@@ -610,6 +610,7 @@ class FileField(Field):
 
 
 class ImageField(FileField):
+    default_validators = [validators.validate_image_file_extension]
     default_error_messages = {
         'invalid_image': _(
             "Upload a valid image. The file you uploaded was either not an "