Modify value of a Django form field during clean()

Question

I am adding custom validation to my forms and custom fields in my Django app. I would like to be able to modify the value of a field when triggering an error. For example, i

Answer 1

We can't redireclty edit request.data because it's an immutable dict. You need to copy it, do your stuff and return it.

But after differentes solutions I find this way (tested in Django 2.2.6)

class MyForm(ModelForm):

    def clean(self):
        cleaned_data = super(MyForm, self).clean()
        self.instance.field = 'value'
        return cleaned_data