Fix Multiple Fields Inputs & check being override in base Models class

core/__init__.py

@@ -13,3 +13,23 @@
 # OR WITHIN THE LOCAL FILE "LICENSE"
 #
 #
+
+from django import forms
+
+
+class MultipleFileInput(forms.ClearableFileInput):
+    allow_multiple_selected = True
+
+
+class MultipleFileField(forms.FileField):
+    def __init__(self, *args, **kwargs):
+        kwargs.setdefault("widget", MultipleFileInput())
+        super().__init__(*args, **kwargs)
+
+    def clean(self, data, initial=None):
+        single_file_clean = super().clean
+        if isinstance(data, (list, tuple)):
+            result = [single_file_clean(d, initial) for d in data]
+        else:
+            result = single_file_clean(data, initial)
+        return result

core/views/files.py

@@ -33,6 +33,7 @@ import os
 
 from ajax_select import make_ajax_field
 
+from core import MultipleFileField
 from core.models import SithFile, RealGroup, Notification
 from core.views import (
     CanViewMixin,
@@ -83,8 +84,7 @@ class AddFilesForm(forms.Form):
     folder_name = forms.CharField(
         label=_("Add a new folder"), max_length=30, required=False
     )
-    file_field = forms.FileField(
-        widget=forms.ClearableFileInput(attrs={"multiple": True}),
+    file_field = MultipleFileField(
         label=_("Files"),
         required=False,
     )