如何在django admin中编辑editable = False字段？

Question

我有一些字段不需要显示给用户，但需要管理员在管理面板中进行编辑。 Manoj Govindan here提供的解决方案仅显示admin中的字段，但在保存并返回到admin中的表单后，字段将再次取消设置。我正在使用django 1.6.5

my models.py

class Profile(models.Model):
    user = models.OneToOneField(User)

    picture1 = ImageWithThumbsField(_("Photo1"), upload_to="photos", null=True,
        blank=True, sizes=((150, 225),))
    picture1_confirm = models.NullBooleanField(null=True, editable=False)

    picture2 = ImageWithThumbsField(_("Photo2"), upload_to="photos", null=True,
        blank=True, sizes=((150, 225),))
    picture2_confirm = models.NullBooleanField(null=True, editable=False)

    picture3 = ImageWithThumbsField(_("Photo3"), upload_to="photos", null=True,
        blank=True, sizes=((150, 225),))
    picture3_confirm = models.NullBooleanField(null=True, editable=False)

和admin.py

class CustomProfileForm(forms.ModelForm):
    picture1_confirm = forms.BooleanField(required=False)
    picture2_confirm = forms.BooleanField(required=False)
    picture3_confirm = forms.BooleanField(required=False)

    class Meta:
        model = Profile
        fields = ('picture1', 'picture1_confirm', 'picture2', 'picture2_confirm',
            'picture3', 'picture3_confirm',)

class ProfileAdmin(admin.ModelAdmin):
    form = CustomProfileForm

admin.site.register(Profile, ProfileAdmin)