Django-空表单无法保存在数据库中 [英] Django - empty form cannot be saved in database
问题描述
我有一个表单,用户在其中指定 lawyer-spec 并将数据保存到数据库。但是我收到一个错误,
I have a form in which, user specifies lawyer-spec and save the data to the database. However I get an error that
**null value in column "lawyer_spec" violates not-null constraint**
因此,表单中的数据未正确处理。
So the data from the form is not processed properly.
编辑:
mthod form_invalid
打印空行,然后打印两个数字( pk和 lawyer_id)
mthod form_invalid
prints empty line, and then two numbers ('pk' and 'lawyer_id')
forms.py
class MakeAppointmentForm(forms.ModelForm):
first_name = forms.CharField(required=True)
class Meta:
model = CalendarAppointmentsReserved
fields = ['case']
def __init__(self, *args, lawyer_id, pk, **kwargs):
super().__init__(*args, **kwargs)
lawyer_id_from_kwargs = lawyer_id
lawyer_specs = LawyersSpec.objects.filter(lawyer=lawyer_id_from_kwargs)
choices = [(spec.lawyer_spec, dict(CASES)[spec.lawyer_spec]) for spec in lawyer_specs]
self.fields['case'].choices = choices
views.py
@method_decorator(user_required, name='dispatch')
class MakingAppointmentView(CreateView):
template_name = "make_appointment.html"
form_class = TestPy.forms.MakeAppointmentForm
model = TestPy.models.CalendarAppointmentsReserved
def get_form_kwargs(self):
pk = self.kwargs.get('pk')
self.kwargs = super().get_form_kwargs()
self.kwargs = {'lawyer_id': self.request.session['lawyer_id'], 'pk': pk}
self.kwargs.update(self.kwargs) # self.kwargs contains all url conf params
return self.kwargs
def form_invalid(self, form):
print(form.errors)
print(self.kwargs.get('pk'))
print(self.kwargs.get('lawyer_id'))
return redirect('home')
def form_valid(self, form):
calendar_model = TestPy.models.CalendarFreeSlot.objects.get(pk=self.kwargs.get('pk'))
calendar_model.is_available = False
calendar_model.save()
self.object = form.save(commit=False)
self.object.users_id = self.request.user
self.object.calendar_free_id = calendar_model
self.request.session['free_calendar_id'] = calendar_model.pk
self.request.session['lawyer_id'] = calendar_model.lawyer_id.pk
self.object.save()
return redirect('home')
models.py
class LawyersSpec(models.Model):
lawyer = models.ForeignKey('MyUser', on_delete=models.PROTECT)
lawyer_spec = models.SmallIntegerField(choices=CASES)
class CalendarAppointmentsReserved(models.Model):
calendar_free_id = models.ForeignKey('CalendarFreeSlot', on_delete=models.PROTECT)
users_id = models.ForeignKey('MyUser', on_delete=models.PROTECT)
case = models.SmallIntegerField(choices=CASES)
如何正确处理数据并保存在数据库中?
How can I process the data properly and save in the database?
推荐答案
您在这里犯了一个关键错误:
You're making a crucial mistake here:
- 您的
CreateView
用于CalendarAppointmentsReserved
模型 - 您的表单用于
LayerersSpec
模型
- Your
CreateView
is for aCalendarAppointmentsReserved
model - Your form is for a
LawyersSpec
model
这是不可能的,因为为模型<$ c $创建视图c> A 期望同一模型 A
的 ModelForm
。
That's not possible, because the create view for model A
is expecting a ModelForm
for the same model A
.
将表单更改为此:
class MakeAppointmentForm(forms.ModelForm):
first_name = forms.CharField(required=True)
class Meta:
model = CalendarAppointmentsReserved
fields = ['case']
def __init__(self, *args, lawyer_id, pk, **kwargs):
super().__init__(*args, **kwargs)
lawyer_specs = LawyersSpec.objects.filter(lawyer=lawyer_id)
choices = [(spec.lawyer_spec, dict(CASES)[spec.lawyer_spec]) for spec in lawyer_specs]
self.fields['case'].choices = choices
现在,您无需分配 self.object.case
Now in your view you don't need to assign self.object.case
anymore.
您还将在 self.kwargs
通过直接为其指定字典的> get_form_kwargs()方法。然后 self.kwargs.update(self.kwargs)
不执行任何操作,您将自己更新一个字典。因此,您在此处丢失了所有POST数据。正确的方法是这样的:
You're also resetting self.kwargs
in your get_form_kwargs()
method by assigning it a dictionary directly. And then self.kwargs.update(self.kwargs)
does nothing, you're updating a dict with itself. So you loose all the POST data here. The proper way to do it is like this:
def get_form_kwargs(self):
form_kwargs = super().get_form_kwargs() # don't mess up self.kwargs
pk = self.kwargs.get('pk')
form_kwargs.update({'lawyer_id': self.request.session['lawyer_id'], 'pk': pk})
return form_kwargs
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