python – DJANGO – 赋值前引用的局部变量’form’

2019年8月3日 224次阅读

我正在尝试使表单从用户获取信息并使用此信息发送电子邮件.这是我的代码：

#forms.py
from django import forms

class ContactForm(forms.Form):
    nome = forms.CharField(required=True)
    email = forms.EmailField(required=True)
    msg = forms.CharField(
        required=True,
        widget=forms.Textarea
    )

#views.py
from django.shortcuts import render, redirect, get_object_or_404, HttpResponseRedirect, render_to_response
from django.core.mail import send_mail
from .forms import ContactForm

def contato(request):
    form_class = ContactForm
    if request.method == 'POST':
        form = form_class(request.POST)
        if form.is_valid():
            nome = request.POST.get('nome')
            email = request.POST.get('email')
            msg = request.POST.get('msg')

            send_mail('Subject here', msg, email, ['testmail@gmail.com'], fail_silently=False)
            return HttpResponseRedirect('blog/inicio')
    return render(request, 'blog/inicio.html', {'form': form})


#contato.html
{% extends "blog/base.html" %}
{% block content %}

                    <form role="form" action="" method="post">
                        {% csrf_token %}
                        {{ form.as_p }}
                        <button type="submit">Submit</button>
                    </form>
{% endblock %}

当我尝试进入联系页面时,我收到此错误：

local variable 'form' referenced before assignment

《python – DJANGO – 赋值前引用的局部变量’form’》

它说错误是在这行views.py中：

return render(request, 'blog/inicio.html', {'form': form})

我对Django有点新意,能帮帮我吗？

最佳答案 如果request.method ==’POST’：block,则在此定义表单变量.

如果您使用GET请求访问视图,则表单未定义.

您应该将视图更改为以下内容：

def contato(request):
    form_class = ContactForm
    # if request is not post, initialize an empty form
    form = form_class(request.POST or None)
    if request.method == 'POST':

        if form.is_valid():
            nome = request.POST.get('nome')
            email = request.POST.get('email')
            msg = request.POST.get('msg')

            send_mail('Subject here', msg, email, ['testmail@gmail.com'], fail_silently=False)
            return HttpResponseRedirect('blog/inicio')
    return render(request, 'blog/inicio.html', {'form': form})
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