Readonly form field in edit view - Flask-Admin

I tried to set a form field as readonly just for the edit view in a Flask-Admin application. Following the answers to this question I know that if I have this

class MyView(ModelView):
    form_widget_args = {
        'title': {
            'readonly': True
        }
    }

I can set a form field as readonly, but this is applied to both create and edit views. How can I apply an argument to the edit view only?

from Readonly form field in edit view - Flask-Admin