Moved ManagementForm's fields to class attributes.

This helps introspection, and it follows the comment in
BaseForm.__init__() to avoid changing base_fields.

Thanks to Silvio Gutierrez and Baptiste Mispelon for investigating.

1 files changed, 7 insertions, 9 deletions

diff --git a/django/forms/formsets.py b/django/forms/formsets.py
index 383ad6f6af..aca518b4d2 100644
--- a/django/forms/formsets.py
+++ b/django/forms/formsets.py
@@ -30,15 +30,13 @@ class ManagementForm(Form):
     new forms via JavaScript, you should increment the count field of this form
     as well.
     """
-    def __init__(self, *args, **kwargs):
-        self.base_fields[TOTAL_FORM_COUNT] = IntegerField(widget=HiddenInput)
-        self.base_fields[INITIAL_FORM_COUNT] = IntegerField(widget=HiddenInput)
-        # MIN_NUM_FORM_COUNT and MAX_NUM_FORM_COUNT are output with the rest of
-        # the management form, but only for the convenience of client-side
-        # code. The POST value of them returned from the client is not checked.
-        self.base_fields[MIN_NUM_FORM_COUNT] = IntegerField(required=False, widget=HiddenInput)
-        self.base_fields[MAX_NUM_FORM_COUNT] = IntegerField(required=False, widget=HiddenInput)
-        super().__init__(*args, **kwargs)
+    TOTAL_FORMS = IntegerField(widget=HiddenInput)
+    INITIAL_FORMS = IntegerField(widget=HiddenInput)
+    # MIN_NUM_FORM_COUNT and MAX_NUM_FORM_COUNT are output with the rest of the
+    # management form, but only for the convenience of client-side code. The
+    # POST value of them returned from the client is not checked.
+    MIN_NUM_FORMS = IntegerField(required=False, widget=HiddenInput)
+    MAX_NUM_FORMS = IntegerField(required=False, widget=HiddenInput)
 
     def clean(self):
         cleaned_data = super().clean()