Clearing Django form fields on form validation error?

Question

I have a Django form that allows a user to change their password. I find it confusing on form error for the fields to have the *'ed out data still in them.

I've tried several methods for removing form.data, but I keep getting a This QueryDict instance is immutable exception message.

Is there a proper way to clear individual form fields or the entire form data set from clean()?

Answer 1

If you need extra validation using more than one field from a form, override the .clean() method. But if it's just for one field, you can create a clean_field_name() method.

http://docs.djangoproject.com/en/1.1/ref/forms/validation/#ref-forms-validation

Answer 2

I guess you need to use JavaScript to hide or remove the text from the container.

Answer 3

Someone showed me how to do this. This method is working for me:

post_vars = {}
post_vars.update(request.POST)
form = MyForm(post_vars, auto_id='my-form-%s')
form.data['fieldname'] = ''
form.data['fieldname2'] = ''

Answer 4

Can't you just delete the password data from the form's cleaned_data during validation?

See the Django docs for custom validation (especially the second block of code).