Question

我有一个模型，我正在使用vanilla视图来创建Create，Update，Detail和Delete视图。

class Person( models.Model ):
    username = models.CharField( max_length=30, unique=True )
    first_name = models.CharField( max_length=30 )
    middle_initial = models.CharField( max_length=3, null=True, blank=True )
    last_name = models.CharField( max_length=30 )
    last_four_ssn = models.CharField( max_length="5" )
    ssn = models.CharField(  max_length="13", verbose_name='SSN', blank=False )

我想要做的是创建一个没有'last_four_ssn'的表单，然后在提交（并验证）表单时，我想将last_four_ssn设置为ssn中的最后四个数字。

class PersonCreate(PersonCRUDView, CreateView):
    fields = ['username', 'first_name', 'middle_initial', 'last_name',
          'ssn', 'email', 'years_of_service', 'birth_date',
          'address', 'city', 'state', 'zip_code']

    def form_valid(self, form):
        form.cleaned_data['ssn_last_four'] = form.cleaned_data['ssn'][-4:] 
        return super(PersonCreate, self).form_valid(form)

但它似乎没有起作用。

如何保存ssn_last_four？

Answer 1

我通常使用post方法，如下所示：

forms.py

from .models import Person

PersonForm(forms.ModelForm):

model = Person

fields = ['username', 'first_name', 'middle_initial', 'last_name',
          'ssn', 'email', 'years_of_service', 'birth_date',
          'address', 'city', 'state', 'zip_code']

视图来自django.http import HttpResponse

from .forms import PersonForm

class PersonCreate(PersonCRUDView, CreateView):

    form_class = PersonForm

    def post(self, request, *args, **kwargs):
        form = self.form_class(request.POST)
        if form.is_valid():
            submited_form = form.save(commit=False)
            submited_form.ssn_last_four = form.cleaned_data['ssn'][-4:]
            submited_form.save()
            # return an HTTPResponse here, example:
            return HttpResponse("Saved!")

如果您想使用form_valid方法：

    def form_valid(self, form):
        self.object = form.save(commit=False)
        self.object.ssn_last_four = form.cleaned_data['ssn'][-4:]
        self.object.save()
        return super(ModelFormMixin, self).form_valid(form)

表单提交后，django香草视图设置字段

1 个答案: