Django request.Get 将变量传递到下一页

Question

我有一个关于请求的基本问题。进入 Django。我在下面给出了我的表单声明

现在，我需要将 v.position 传递到下一页。如果我的 v.position 已填充，如何验证 request.get

例如：- 下面的代码是否正确？

volpostion = request.GET['志愿者职位'].strip()

如果 volposition 执行所需的功能。

我读到了那个请求。Get 得到一个表单字段的字典。。这里的表单字段是指标签名称？

Forms.py

<tr>
        <th colspan=4 align="left"><label for="id_Volposition">Volunteer Position:</label></th>
        <th colspan=.5 align="left"><a href="/signups/new/{{ v.position }}" class="username" <u>{{ v.volposition }}</u></a></th>
<tr> <td colspan="2" height="2" style="display:none">&nbsp;</td> </tr>
</tr>

<tr>
        <th colspan=4 align="left"><label for="id_roledesc">Role Description:</label></th>
        <th colspan=.5 align="left">{{ v.roledesc }}</th>
<tr> <td colspan="2" height="2" style="display:none">&nbsp;</td> </tr>
</tr>

更多信息：

urls.py

urlpatterns = patterns('',
   (r'^new/$',                           sfp.view),
   (r'^volunteer/$',     volunteer_page),
   (r'^vollist/$', volunteer_list),
   (r'^volcont/$', volunteer_contact)

views.py

sfp = SimpleFormProcessing(
    form_class=VolunteerSignupForm,
    form_2_model=volunteersignupform_2_model,
    form2_class=VolunteerForm,
    form_template='signups/create_contact_form.dmpl',
    email_template='signups/response_email.dmpl',
    email_html_template='signups/response_email_html.dmpl',
    email_subject='Vibha Volunteer Signup',
    email_sender='volunteer@vibha.org',
    redirect_url='/signups/thanks/',
    do_captcha=True)

SimpleFormProcessing.py

from django.shortcuts import render_to_response
from django.core.mail import EmailMultiAlternatives
from django.template.loader import render_to_string
from django.http import HttpResponseRedirect
from formwrappers import form_with_captcha, form_with_ipaddress
import pdb


class SimpleFormProcessing:

    def __init__(self, form_class, form_2_model, form2_class, form_template,
            email_template, email_subject, email_sender, redirect_url,
            do_captcha=False, record_ip_addr=False, email_html_template=None):
        self.form_class = form_class
        self.form_2_model = form_2_model
        self.form_template = form_template
        self.email_template = email_template
        self.email_html_template = email_html_template
        self.email_subject = email_subject
        self.email_sender = email_sender
        self.redirect_url = redirect_url
        self.do_captcha = do_captcha
        self.record_ip_addr = record_ip_addr

    def view(self, request, initial={}):
        pdb.set_trace()
        Form = self.form_class
        if self.do_captcha:
            Form = form_with_captcha(Form, request)
        if self.record_ip_addr:
            Form = form_with_ipaddress(Form, request)
        if request.method == 'POST':
            # Try processing the form
            if self.do_captcha and not accepts_cookies(request):
                return our_flatpage('Please enable cookies and try again.')
            else:
                form = Form(request.POST)
                if form.is_valid():
                    # The form is correct, process it
                    model = self.form_2_model(form)
                    if self.email_template:
                        text_content = render_to_string(self.email_template, {'model': model})
                        recipients = model.emailRecipients()
                        try:
                            bcc_recipients = model.emailBCCRecipients()
                        except:
                            bcc_recipients = None
                        msg = EmailMultiAlternatives(self.email_subject, text_content, self.email_sender,
                                recipients, bcc_recipients)

                        if self.email_html_template:
                            html_content = render_to_string(self.email_html_template, {'model': model})
                            msg.attach_alternative(html_content, "text/html")

                        msg.send()

                    return HttpResponseRedirect(self.redirect_url)
                else:
                    # Show the form with errors
                    return render_to_response(self.form_template, {'form': form})
        else:
            # Show the empty form

            form = Form(initial=initial)
            if self.do_captcha:
                accepts_cookies(request)

volunteer_list.dmpl

{% extends "base.dmpl" %}
{% block title %}User Registration{% endblock %}
{% block head %}User Registration{% endblock %}
{% block contentBox %}
<h2>Volunteer Opportunities</h2>
<p>Vibha is currently looking for volunteers interested in helping the organization in the following areas:</p>
<div class="relation">
<ul>
{% for k in teamrel %}
        <li align="left"><a href="#{{ k }} "> <b> {{ k}} </b> </a> </li>
{% endfor %}
</ul>
</div>

<p>If you are interested in any of these opportunities please contact us by clicking on the position you are interested and filling out the form.</p>
<p>&nbsp;</p>

<table>

{% for v in vollist %}
{% ifchanged  v.teamrelation %}
<tr>
<th colspan=7 align="left"><h3><a name="{{ v.teamrelation }}"> {{v.teamrelation}} </a> </h3></th>
</tr>
{% endifchanged %}


<tr>
        <th colspan=4 align="left"><label for="id_Volposition">Volunteer Position:</label></th>
        <th colspan=.5 align="left"><a href="/signups/new/{{ v.position }}" class="username" <u>{{ v.volposition }}</u></a></th>
<tr> <td colspan="2" height="2" style="display:none">&nbsp;</td> </tr>
</tr>

<tr>
        <th colspan=4 align="left"><label for="id_roledesc">Role Description:</label></th>
        <th colspan=.5 align="left">{{ v.roledesc }}</th>
<tr> <td colspan="2" height="2" style="display:none">&nbsp;</td> </tr>
</tr>
<tr>
        <th colspan=4 align="left"><label for="id_timereqt">Time Requirements:</label></th>
        <th colspan=.5 align="left">{{ v.noofhours }} hours per month</th>
<tr> <td colspan="2" height="2" style="display:none">&nbsp;</td> </tr>
</tr>
<tr>
        <th colspan=4 align="left"><label for="id_qualreqt">Qualification and Requirements:</label></th>
        <th colspan=.5 align="left">{{ v.Qualreqt }}</th>
<tr> <td colspan="2" height="2" style="display:none">&nbsp;</td> </tr>
</tr>
<tr>
        <th colspan=4 align="left"><label for="id_duration">Duration of the Role:</label></th>
        <th colspan=20 align="left">  {{ v.Duration}} {{ v.Durationyrmon}}</th>
<tr> <td colspan="10" height="20" style="display:none">&nbsp;</td> </tr>
</tr>
{% endfor %}

</table>

{% endblock %}

Answer 1

您的问题很难解读，但据我所知，这里有一些提示：

1. request.GET 和 request.POST 字典的键（取决于使用的方法）将是字段的 HTML name 属性，而不是它们的标签。您没有发布任何包含任何字段的代码，但总的来说，如果您有类似的内容：

   <input type="hidden" name="volposition" value="0">
   

   然后，您会找到以下值：

   request.POST['volposition']
   

2. 当您不确定该键是否存在时，请始终在字典中使用.get() 方法。如果密钥不存在，您拥有的代码将引发IndexError 异常。例如：

   volposition = request.GET.get('volposition')
   

3. 实际上应始终通过POST 方法发送表单。 罕见 例外是搜索表单之类的东西，其中将提交的值作为查询字符串更有意义（这些通常通过GET 方法发送）。经验法则是，如果您出于只读目的请求资源，请使用GET。例如，搜索 Google，不会更改任何内容，您只是请求搜索结果列表，因此使用了 GET。但是，如果您正在进行任何类型的修改（创建、编辑，甚至只是更新会话数据...任何实际影响某种更改 的内容），那么您可以使用POST。您也不应该将两者混为一谈。例如，不要将POST 发送到带有查询字符串的 URL。

说了这么多。您应该能够使用以下内容覆盖您的基地：

{% if request.REQUEST.volposition %}
<input type="hidden" name="volposition" value="{{ request.REQUEST.volposition }}">
{% endif %}

request.REQUEST 包含通过 URL 传递的参数，无论是 GET 还是 POST。当您知道将发送什么方法数据时，请始终使用request.GET 或request.POST，但在这种情况下，您只需要该值并且它可能来自任一方法，@987654341 @ 是可以接受的。

如果键确实 存在，那么隐藏的输入将以其值呈现。无论数据如何发送，volposition 现在都会传递。