在Django的自定义用户注册表中处理动态下拉字段

Question

我正在构建一个基于python django的系统，用户可以在每个州的基础上注册每个区域。在这里我想要一个这样的注册表格，首先会有一个状态下拉菜单，其中一个状态将从其中选择，然后根据她的选择，另一个区域下拉菜单将被填充，然后用户的其他区域像姓名，电子邮件，mobile_num必须填写。

现在，我已经建立了一个用户注册表单类似如下：

class RegistrationForm(UserCreationForm): 

    district_id = <Yet to be implemented> 
    state_id = <Yet to be implemented> 
    first_name = forms.RegexField(regex=r'^\w+$', widget=forms.TextInput(attrs=dict(required=True, max_length=30)), label=_("First name"), error_messages={ 'invalid': _("This value must contain only letters") }) 
    last_name = forms.RegexField(regex=r'^\w+$', widget=forms.TextInput(attrs=dict(required=True, max_length=30)), label=_("Last name"), error_messages={ 'invalid': _("This value must contain only letters") }) 
    password1 = forms.CharField(widget=forms.PasswordInput(attrs=dict(required=True, max_length=30, render_value=False)), label=_("Password")) 
    password2 = forms.CharField(widget=forms.PasswordInput(attrs=dict(required=True, max_length=30, render_value=False)), label=_("Password (again)")) 
    date_of_birth = forms.DateField(widget=forms.TextInput(attrs= {'class':'datepicker'})) 
    sex = forms.ChoiceField(choices=(('M', 'MALE'), ('F', 'FEMALE')), label=_("Sex")) 
    voter_id = forms.CharField(widget=forms.TextInput(attrs=dict(required=True, max_length=30)), label=_("Voter Id")) 
    is_election_staff = forms.BooleanField(initial=False, required=False) 

    class Meta: 
     model = CustomUser 
     fields = ['first_name', 'last_name', 'voter_id', 'date_of_birth', 'sex', 'is_election_staff', 'district_id', 'state_id'] 


    def clean_username(self): 
     try: 
      user = User.objects.get(voter_id__iexact=self.cleaned_data['voter_id']) 
     except User.DoesNotExist: 
      return self.cleaned_data['voter_id'] 
     raise forms.ValidationError(_("The user with given voter id already exists. Please try another one.")) 



    def clean(self): 
     if 'password1' in self.cleaned_data and 'password2' in self.cleaned_data: 
      if self.cleaned_data['password1'] != self.cleaned_data['password2']: 
       raise forms.ValidationError(_("The two password fields did not match.")) 
     return self.cleaned_data 

    def save(self, commit=True): 
     # Save the provided password in hashed format 
     user = super(RegistrationForm, self).save(commit=False) 
     user.first_name = self.cleaned_data['first_name'] 
     user.last_name = self.cleaned_data['last_name'] 
     user.date_of_birth = self.cleaned_data['date_of_birth'] 
     user.sex = self.cleaned_data['sex'] 
     user.voter_id = self.cleaned_data['voter_id'] 
     user.is_election_staff = self.cleaned_data['is_election_staff'] 
     user.username = user.voter_id 
     # user.set_password(self.cleaned_data['password1']) 

     if commit: 
      user.save() 
     return user 

在这里，在上面的表格我无法弄清楚如何处理地区和国家按我的要求，我上面说，这样，当用户被保存，她与一个特定的地区和州相关联。地区下拉菜单将根据她选择的状态动态填充。

Answer 1

这可能会解决您的问题。 它具有所有细节。

Django cities light