上下文變量將不會顯示在Django模板中

Question

我正在編寫一個博客應用程序，並且在呈現頁面時不會顯示變量。 這是我的博客應用程序的views.py函數：

def post_share(request, post_id):
    # retrieves 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())                                          
            subject = '{} ({}) recommends you reading "{}"'.format(cd['name'], cd['email'], post.title)
            message = 'Read "{}" at {}\n\n{}\'s comments: {}'.format(post.title, post_url, cd['name'], cd['comments'])

            send_mail(subject, message, 'admin@myblog.com', [cd['to']])
            sent = True

    else:
        form = EmailPostForm()
    return render(request, 'blog/post/share.html', {'post': post,
                                                'form': form,
                                                'sent': sent})

和forms.py ：

from django import forms
from .models import Comment

class EmailPostForm(forms.Form):
    name = forms.CharField(max_length=25)
    email = forms.EmailField()
    to = forms.EmailField()
    comments = forms.CharField(required=False, widget=forms.Textarea)

我的HTML模板的相關部分：

{% block content %}
    {% if sent %}
        <h1> Email successfully sent </h1>
        <p>
            "{{ post.title }}" was successfully sent to {{ cd.to }} .
        </p>
    {% else %}
        <h1> Share "{{ post.title }}" by email</h1>
        <form action="." method="post">
            {{ form.as_p }}
            {% csrf_token %}
            <input type="submit" value="Send e-mail">
        </form>
    {% endif %}

模板加載並發送了電子郵件，但只顯示：

“后測”成功發送到。

我需要說收件人的電子郵件。

Answer 1

您需要在模板上下文中包括清除的數據。 但是，僅在表單有效時定義cd ，因此您可以執行以下操作：

data = {
    'post': post,
    'form': form,
    'sent': sent,
}

if sent:
    data['cd'] = cd
return render(request, 'blog/post/share.html', data)

由於您不需要模板中的整個cd詞典，因此另一個選擇是僅傳遞所需的變量cd['to'] 。

data = {
    'post': post,
    'form': form,
    'sent': sent,
}

if sent:
    data['sent_to'] = cd['to']
return render(request, 'blog/post/share.html', data)

然后，在模板中，您將使用{{sent_to}}而不是{{cd.to}}

Answer 2

cd僅在您的視圖內使用，但不是上下文變量。

要使其成為上下文變量並在模板中可訪問，您必須將其添加到現有的上下文變量中：

return render(request, 'blog/post/share.html', {'post': post,
                                            'form': form,
                                            'sent': sent,
                                            'cd': cd})

Answer 3

您需要添加to或者cd到您的上下文：

return render(request, 'blog/post/share.html', {'post': post,
                                                'form': form,
                                                'sent': sent})

例如：

{'cd': cd,
 'post': post,
 'form': form,
  'sent': sent}