在我的代码中,您看到两个打印语句。在我的表单中,数据库中以前保存的值是emailprevious@gmail.com
。我在表单中输入的新值为emailnew@gmail.com
。
我从打印报表中获得的预期结果:
emailprevious@gmail.com self.object.email
emailprevious@gmail.com self.object.email 2
实际结果:
emailprevious@gmail.com self.object.email
emailnew@gmail.com self.object.email 2
似乎self.attendee_form.is_valid(),
正在改变self.object。我找不到is_valid()
的Django源代码中定义的行为,您能解释一下self.object
为何发生变化吗?
class AssignAttendee(SuccessMessageMixin, SingleObjectMixin, TemplateView):
template_name = 'attendees/front/assign_attendee.html'
success_message = _("Attendee has been successfully updated.")
def get_object(self):
return get_object_or_404(
Attendee,
ticket_reference=self.kwargs['ticket_reference'],
ticket_code=self.kwargs['ticket_code'],
)
def get(self, request, *args, **kwargs):
self.object = self.get_object()
return super().get(request, *args, **kwargs)
@cached_property
def attendee_form(self):
return AssignAttendeeForm(
prefix='attendee',
data=self.request.POST or None,
instance=self.object,
)
@cached_property
def get_consent(self):
organizer = self.object.event.organizer
return organizer.contacts.filter(email=self.object.email).first()
@cached_property
def consent_form(self):
return AttendeeConsentForm(
prefix='consent',
data=self.request.POST or None,
instance=self.get_consent,
email=self.object.email,
)
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
context.update({
'attendee': self.object,
'attendee_form': self.attendee_form,
'consent_form': self.consent_form,
})
return context
@transaction.atomic
def post(self, request, *args, **kwargs):
self.object = self.get_object()
# Check if consent already exists which defines if consent entry will be
# updated or if a new one will be created.
consent = self.get_consent
print(self.object.email, "self.object.email")
# Validate forms
forms = [
self.attendee_form.is_valid(),
self.consent_form.is_valid(),
]
print(self.object.email, "self.object.email 2")
if not all(forms):
messages.error(request, _("Please correct the errors in the form."))
else:
self.object = self.attendee_form.save()
if consent:
consent.first_name = self.object.first_name
consent.last_name = self.object.last_name
consent.email = self.object.email
consent.save(
update_fields=['email', 'first_name', 'last_name']
)
consent.events.add(self.object.event)
else:
consent_form = self.consent_form.save(commit=False)
consent_form.email = self.object.email
consent_form.first_name = self.object.first_name
consent_form.last_name = self.object.last_name
consent_form.organizer = self.object.event.organizer
consent_form.save()
consent_form.events.add(self.object.event)
答案 0 :(得分:0)
这是预期的结果。 is_valid()正在检查以确保表单有效,即满足您在模型或表单的clean方法中规定的所有要求。它使用新数据更新对象,因此使用print 2语句更新该对象,以便您根据需要保存对象。因此,如果您更改电子邮件地址,并且表单中没有验证错误,则根据您的发帖方法,对象将在您提交表单时随新电子邮件一起保存。如果您没有调用save,它将仍然在控制台中打印新电子邮件,但是当您检查数据库时,它将是旧电子邮件。