django - Reset field value in case of a ValidationError -

i have custom form field (subclassed charfield). underlying model has is_approved() method. if field approved (is_approved() returns true), raise validationerror , render field read only. drawback here html field has value entered (and cannot save due validationerror) , cannot change html field read only.

is there way change field’s value original one, form won’t complain? setting self.initial in field’s validate() method didn’t help.

update: after experimenting form class, implemented following clean() method:

def clean(self, *args, **kwargs):     field_id, e in self.errors.items():         needs_reset = false          error in e.as_data():             if error.code == 'field_approved':                 needs_reset = true          if needs_reset:             self.cleaned_data[field_id] = self.fields[field_id].field.value      super(buildfillform, self).clean(*args, **kwargs) 

but still doesn’t reset field’s value.

i have found solution setting self.was_approved in field’s to_python() method:

def to_python(self, value):     old_value = self.dbfield.value      if (             self.dbfield.is_approved() ,             old_value != value):         self.was_approved = true      return '' if value none else value 

and using was_approved property change return value of bound_data():

def bound_data(self, data, initial):     if self.was_approved:         return initial     else:         return data 

with approach, remove clean() method mentioned in question, , same result desired: validation error, while rendered form has database value displayed.