Question

如何添加＆＃34;标题＆＃34;上下文所以它可以在模板中访问。我想它需要以某种方式通过获取请求？将此变量传递给FormView类中的get方法的pythonic方法是什么？

views.py

class IndexView(FormView):
    template_name = 'index.html'
    form_class = CheckForm
    success_url = reverse_lazy('index')

    def form_valid(self, form, **kwargs):
        context = self.get_context_data(**kwargs)
        context['headers'] = form.result()
        return super(IndexView, self).form_valid(form)

的index.html

<form action="." method="post" name="url" id="url" novalidate>
    {{ form.as_p }}
    {% csrf_token %}
<button type="submit">Check</button>

{% if headers %}
{% for k,v in headers %}
{{ k }}: {{ v }}<br>
{% endfor %}
{% else %}
<br>No data
{% endif %}

forms.py

from django import forms

import requests

class CheckForm(forms.Form):
    url = forms.URLField(max_length=255, label='')

    def result(self):
        cd = self.cleaned_data
        url = cd['url']
        r = requests.get(url)
        r.headers
        return r

urls.py

urlpatterns = [
    url(r'^$', views.IndexView.as_view(), name='index'),
]

Answer 1

主要问题是重定向成功。这将向同一窗口抛出另一个get请求。在您的情况下，这是不可取的，因为您想要利用表单中的数据。

<强> views.py

import requests

class IndexView(FormView):
    template_name = 'index.html'
    form_class = CheckForm

    def form_valid(self, form, **kwargs):
        context = self.get_context_data()
        context['headers'] = form.get_headers()
        return self.render_to_response(context)

<强> forms.py

import requests
from django import forms

class CheckForm(forms.Form):
    url = forms.URLField(max_length=255, label='')

    def get_headers(self):
        if self.cleaned_data:
            url = self.cleaned_data['url']
            return requests.get(url).headers
        return {}

<强>的index.html

<form action="." method="post" name="url" id="url" novalidate>
    {{ form.as_p }}
    {% csrf_token %}
<button type="submit">Check</button>

{% if headers %}
{% for k,v in headers.items %}
{{ k }}: {{ v }}<br>
{% endfor %}
{% else %}
<br>No data
{% endif %}

Answer 2

我很确定您要使用messages

from django.contrib import messages

现在你可以添加一些内容并将其发送到下一个模板。

messages.success(request, u"Success message - text only")

在模板中：

{% if messages %}
<ul class="messages">
    {% for message in messages %}
    <li{% if message.tags %} class="{{ message.tags }}"{% endif %}>
        {% if message.level == DEFAULT_MESSAGE_LEVELS.ERROR %}Important: {% endif %}
        {{ message }}
    </li>
    {% endfor %}
</ul>
{% endif %}

Django：在同一页面上返回表单数据

2 个答案: