如何在CreateView中将字段设为只读

from django.views.generic.edit import CreateView
from django import forms

class MyForm(forms.ModelForm):
    def __init__(self, *args, **kwargs):
        super().__init__(*args, **kwargs)
        # 将字段设置为只读
        self.fields['my_field'].widget.attrs['readonly'] = True

class MyCreateView(CreateView):
    form_class = MyForm
    model = MyModel
    template_name = 'my_template.html'
    success_url = '/success/'

    def get_form(self, form_class=None):
        form = super().get_form(form_class)
        # 设置其他字段为只读
        form.fields['other_field'].widget.attrs['readonly'] = True
        return form