渲染时没有模型的Django表单没有出现在模板中

Question

我有一个没有关联模型的表单，只是一个用于发送消息的联系表单。

我现在对 django 表单有一些经验，所以我认为我做的一切都是正确的，但是当在浏览器中查看页面时根本没有渲染，也没有任何错误需要解决。

我的forms.py：

from django import forms

class ContactForm(forms.Form):
    class Meta:
        fields = ['full_name', 'phone', 'email', 'message']
        full_name = forms.CharField(max_length=20)
        phone = forms.CharField(max_length=20)
        email = forms.CharField(max_length=30)
        message = forms.CharField(max_length=400)

我的观点是将表单变成有用的东西：

def contact_view(request):
    full_name = request.POST.get('full_name', False)
    phone = request.POST.get('phone', False)
    email = request.POST.get('email', False)
    message = request.POST.get('message', False)
    form = ContactForm()
    if request.method == 'POST':
        form = ContactForm(request.POST)
    if form.is_valid():
#        send_emails(first_name, last_name, email)
        template = loader.get_template('/myapp/mysite/main_page/templates/main_page/thankyoumsg.html')
        return HttpResponse(template.render({}, request))
    template = loader.get_template('/myapp/mysite/main_page/templates/main_page/contact.html')
    return HttpResponse(template.render({}, request))

还有我的模板：

<form class="leave-comment" action="." method="post">
{% csrf_token %}
{{form.as_p}}
    <button type="submit">Submit</button>
</form>

但是什么都没有显示，我不确定为什么。我该如何解决这个问题？

Answer 1

class Meta 仅在您拥有 模型 时使用。如果您只需要呈现没有特定模型的表单，请使用这种方式。更多信息请访问官方文档： https://docs.djangoproject.com/en/2.1/topics/forms/

forms.py

class ContactForm(forms.Form):
    full_name = forms.CharField(max_length=20)
    phone = forms.CharField(max_length=20)
    email = forms.CharField(max_length=30)
    message = forms.CharField(max_length=400)

views.py

 def contact_view(request):

    if request.method == 'POST':

       form = ContactForm(request.POST)

       if form.is_valid():

            full_name = form.cleaned_data['full_name']
            phone = form.cleaned_data['phone']
            email = form.cleaned_data['email']
            message = form.cleaned_data['message']

            template = loader.get_template('/myapp/mysite/main_page/templates/main_page/thankyoumsg.html')
            return HttpResponse(template.render({'form': form}, request))

        template = loader.get_template('/myapp/mysite/main_page/templates/main_page/thankyoumsg.html')
        return HttpResponse(template.render({'form': form}, request))

    form = ContactForm()
    template = loader.get_template('/myapp/mysite/main_page/templates/main_page/contact.html')
    return HttpResponse(template.render({'form': form}, request))

Answer 2

您没有在最后一行的响应中包含表单。这应该（可能）起到作用：

def contact_view(request):
    ...
    return HttpResponse(template.render({'form': form}, request))

我也相信您需要将字段直接添加到表单类中，而不是在元类中。

from django import forms

class ContactForm(forms.Form):
    # Move out the fields here instead
    full_name = forms.CharField(max_length=20)
    phone = forms.CharField(max_length=20)
    email = forms.CharField(max_length=30)
    message = forms.CharField(max_length=400)

    class Meta:
        # This may still be there but may also be a bit redundant since
        # you're choosing to show all applied fields.
        fields = ['full_name', 'phone', 'email', 'message']