主題從下拉菜單使用枚舉Django

Question

我有ContactForm主題下拉使用枚舉，主題是三個不同的字符串： 1.我有一個問題。 2.幫助/支持 3.請給我打電話。

當用戶發送的消息必須選擇以上三種之一，這是我下面的代碼：從django_enumfield進口枚舉

* forms.py *

class SubjectEnum(enum.Enum): 
    subject_one = 'I have a question' 
    subject_two = 'Help/Support' 
    subject_three = 'Please give me a call' 

class ContactForm(forms.ModelForm): 
    name = forms.CharField(required=True) 
    email = forms.EmailField(required=True) 
    subject = forms.TypedChoiceField(choices=SubjectEnum.choices(), coerce=str) 
    message = forms.CharField(widget=forms.Textarea) 




    def __init__(self, *args, **kwargs): 
     self.helper = FormHelper() 
     self.helper.add_input(Submit('submit', 'Submit')) 
     super(ContactForm, self).__init__(*args, **kwargs) 

和像belwo一樣的view.py文件：

class ContactFormView(FormView): 
    form_class = ContactForm 
    template_name = "contact/email_form.jade" 
    success_url = '/email-sent/' 

    def form_valid(self, form): 
     message = "{name}/{email} said: ".format(
      name=form.cleaned_data.get('name'), 
      email=form.cleaned_data.get('email')) 
     message += "\n\n{0}".format(form.cleaned_data.get('message')) 
     send_mail(
      subject=form.cleaned_data.get('-subject').strip(), 
      message=message, 
      from_email="enquiries@example.com", 
      recipient_list=[settings.LIST_OF_EMAIL_RECIPIENTS], 
     ) 
     return super(ContactFormView, self).form_valid(form) 

聯繫方式：

- extends "base.jade" 
- load crispy_forms_tags 
    block meta_title 
     | Contact Us 
    block content 
     .jumbotron 
      h1 Contact Us 
     .row 
      .span6 
       {% crispy form form.helper %} 

我得到一個錯誤說，ValueError異常：具有的ModelForm沒有指定模型類。任何想法的傢伙？ 謝謝

Answer 1

您應該在模型表單中指定一個Meta類並設置使用的模型。請注意，您不需要指定與模型字段無關的表單字段。

class ContactForm(forms.ModelForm) 
    name = forms.CharField(required=True) 
    email = forms.EmailField(required=True) 
    subject = forms.TypedChoiceField(choices=SubjectEnum.choices(), coerce=str) 
    message = forms.CharField(widget=forms.Textarea) 

    class Meta: 
     model = Contact 
     fields = ['name', 'email', 'subject', 'message'] 

如果你沒有一個模型Contact，你應該使用的Form代替ModelForm：

class ContactForm(forms.Form): 
    name = forms.CharField(required=True) 
    email = forms.EmailField(required=True) 
    subject = forms.TypedChoiceField(choices=SubjectEnum.choices(), coerce=str) 
    message = forms.CharField(widget=forms.Textarea) 

    def __init__(self, *args, **kwargs): 
     self.helper = FormHelper() 
     self.helper.add_input(Submit('submit', 'Submit')) 
     super(ContactForm, self).__init__(*args, **kwargs) 

See the documentation對ModelForm S和其使用的詳細信息。