Fixed multiple file upload in django 1.11

boards/forms/fields.py

@@ -19,13 +19,6 b' class MultipleFileInput(forms.FileInput)'
         else:
             return files.getlist(name)
 
-    def render(self, name, value, attrs=None):
-        if not attrs:
-            attrs = dict()
-        attrs['multiple'] = ''
-
-        return super().render(name, None, attrs=attrs)
-
 
 class MultipleFileField(forms.FileField):
     """
@@ -48,7 +41,10 b' class UrlFileWidget(forms.MultiWidget):'
     """
     def __init__(self, *args, **kwargs):
         widgets = (
-                MultipleFileInput(attrs={'accept': 'file/*'}),
+                MultipleFileInput(attrs={
+                    'accept': 'file/*',
+                    'multiple': ''
+                }),
                 forms.Textarea(attrs={
                     ATTRIBUTE_PLACEHOLDER: URL_PLACEHOLDER,
                     ATTRIBUTE_ROWS: URL_ROWS,