Contactform in footer of page

问题

I have a contactform in the footer of a website. So it is on every page. It works, with one problem: as soon as it is sent, it doesn't show anymore. More specific I guess when my request is no longer empty.

@register.inclusion_tag('home/tags/contact.html', takes_context=True)
def contact_form(context):
    request = context['request']

    if request.method == 'POST':
        form = ContactForm(request.POST)
        if form.is_valid():
            subject = form.cleaned_data['naam']
            from_email = form.cleaned_data['email']
            message = form.cleaned_data['bericht']
            messages.success(request, 'Form submission successful')
        try:
            send_mail(subject, message, from_email, ['myemailaddress'])

        except BadHeaderError:
            return HttpResponse('invalid header found')
        return context

    else:
        form = ContactForm()

    return {request: 'context.request', 'form': form}

Tips would be appreciated.

回答1:

It looks like you are returning the template tag's context without the form whenever someone submits a form.

See below:

• Do not return the context object until the end of the function, this will make things simpler to work through.
• Best to add keys to the context object, this saves you from having to re-add request because it is already there.

• Remove the else branch towards the end, you want to send a new (blank) form all the time, even after receiving a response (via POST).

  @register.inclusion_tag('home/tags/contact.html', takes_context=True) def contact_form(context): request = context['request']

  if request.method == 'POST':
      form = ContactForm(request.POST)
      if form.is_valid():
          subject = form.cleaned_data['naam']
          from_email = form.cleaned_data['email']
          message = form.cleaned_data['bericht']
          messages.success(request, 'Form submission successful')
      try:
          send_mail(subject, message, from_email, ['myemailaddress'])
  
      except BadHeaderError:
          return HttpResponse('invalid header found')
      #return context # returning here sends back the context without 'form'
  
  # remove the else branch, you always want to return an empty form
  #else:
  form = ContactForm()
  
  # return {request: 'context.request', 'form': form}
  # return at a consistent place in a consistent way
  # add to context, rather then recreating it
  context['form'] = form
  return context
  

Another workaround would be just to do a redirect back to the URL that the contact page is on (however, you will loose your messages).

来源：https://stackoverflow.com/questions/48370597/contactform-in-footer-of-page