Python Can'；无法访问“to”窗体字段的值

我正在使用Django创建一个博客，我实现了一个允许用户通过电子邮件共享帖子的功能

这是

表格

from django import forms
from .models import Post

class EmailPostForm(forms.Form):
    name = forms.CharField(max_length=100, required=True, widget=forms.TextInput(
        attrs={'placeholder' : 'your name'}
    ))
    email = forms.EmailField(max_length=200, required=True, widget=forms.TextInput(
        attrs={'placeholder' : 'your email'}
    ))
    to = forms.EmailField(max_length=200, required=True, widget=forms.TextInput(
        attrs={'placeholder' : 'recipient\'s email'}
    ))
    comments = forms.CharField(max_length=500, required=False, widget=forms.Textarea(
        attrs={'rows' : 5, 'placeholder' : 'Tell recipient what you think about this post (optional)'}
    ), help_text='The maximum length of the text is 4000')

这是

视图

def post_share(request, post_id):
    # Retrieve the post by id
    post = get_object_or_404(Post, id=post_id, status='published')
    sent = False
    if request.method == 'POST':
        # Form was submitted
        form = EmailPostForm(request.POST)
        if form.is_valid():
            # Form fields passed validation
            cd = form.cleaned_data
            post_url = request.build_absolute_uri(post.get_absolute_url())
            presubject = '{} ({}) recommends you reading "{}"'
            subject = presubject.format(cd['name'], cd['email'], post.title)
            premessage = 'Read "{}" at {}\n\n{}\'s comments: {}'
            message = premessage.format(post.title, post_url, cd['name'], cd['comments'])
            send_mail(subject, message, 'admin@sayc.com', [cd['to']])
            sent = True
    else:
        form = EmailPostForm()
    return render(request, 'post_share.html', {'post' : post, 'form' : form, 'sent' : sent})

这是

url

urlpatterns = [
    url(r'^admin/', admin.site.urls),
    url(r'^(?P<post_id>\d+)/share/$', views.post_share, name='post_share'),
]

---

它工作正常，但每当我发送电子邮件时，模板都应该返回模板的

if

块中的内容。困扰我的是，

{{cd.to}}

（附加在模板中成功消息的末尾）没有返回任何值。怎么了？

您没有将

cd

传递给模板，因此它无法输入该值。

---

您可以使用

{{form.data.to}}

而不是

{{cd.to}}

来显示表单本身的值。

您尚未将

cd

传递给模板，因此它无法放入该值。 您可以使用

{{form.data.to}}

来显示表单本身的值，而不是

{{cd.to}

{% extends "base.html" %}

{% block title %}Share a Post - {{ block.super }}{% endblock %}

{% block content %}
    <div class="mt-4 row justify-content-center">
        <div class="col-lg-6 col-md-8 col-sm-10">
            <div class="card">
                {% if sent %}
                    <div class="card-body text-center">
                        <h3>Email Successfully Sent</h3>
                        <p class="lead">"{{ post.title }}" was successfully sent to {{ cd.to }}</p>
                    </div>
                {% else %}
                    <div class="card-body">
                        <h3 class="card-title text-center">Share "{{ post.title }}" by email</h3>                            
                        <form action="." method="post" novalidate>
                            {% csrf_token %}
                            {% include 'includes/form.html' %}
                            <button type="submit" class="btn btn-primary btn-block">Share</button>
                        </form>
                    </div>
                {% endif %}                    
            </div>
        </div>
    </div>
{% endblock %}