Django formtools 向导生成空白页（未返回错误）

Question

我试图在 formtools 包中使用 formwizard 但没有成功（当包在早期版本的 Django 中时我能够做到这一点）。

我得到的唯一回复是：

[23/Jan/2016 11:06:50]"GET /registration/wizard HTTP/1.1" 200 13729

和一个空白页。浏览器或 Eclipse 控制台中没有错误。

谷歌搜索不可能没有错误。请帮忙

提前致谢

我做了什么？

首先，我用 pip 安装了 formtools 包：

django-formtools==1.0
Django==1.8.3

按照官方文档的说明：

定义表格类

registration/forms.py

class StepForm1(forms.Form):
    first_field = forms.CharField(max_length=100)
    second_field = forms.CharField()

class StepForm2(forms.Form):
    message = forms.CharField(widget=forms.Textarea)

创建 WizardView

registration/views.py

TEST_TEMPLATES = {"test_step_1": "registration/test_step1.html", "test_step_2": "registration/test_step2.html", }

from formtools.wizard.views import SessionWizardView

class WizardTest(SessionWizardView):
    template_name = 'registration/test_wizard.html'

    # Return templates for each step
    def get_templates_name(self):
        return [TEST_TEMPLATES[self.steps.current]]

    # Method called when all is done
    def done(self, form_list, **kwargs):

        # return HttpResponseRedirect('/url-to-redirect-to/') 

        # We return the final template with the info
        return render_to_response('test_done.html', {
                                   'form_data':[form.cleaned_data for form in form_list],
                                   })

    # THESE METHODS BELOW ARE NOT NEEDED, BUT COMMENTED FOR FUTURE USE

    # Not strictly needed. Returns data for a step
    # or None if form is not valid
    # def get_cleaned_data_for_step(self, step):
    #     return None

    # Form data postprocessing in a concrete wizard step
    # def process_step(self, form):
    #     return self.get_form_step_data(form)

    # Handles value from a step before storing them into wizard
    # def get_form_step_data(self, form):
    #     return form.data

创建模板

registration/test_step1.html

<h1>Two fields form</h1>
<input id="first_field" name="first_field">
<input id="second_field" name="second_field">

registration/test_step2.html

<h1>Message form</h1>
<input id="message" name="message">

registration/test_wizard.html

{% extends "person/alumnos.html" %}
{% load i18n %}

{% block head %}
    {{ wizard.form.media }}
{% endblock head %}

{% block content %}
<p>{% trans "Step {{wizard.steps.step1}} of {{wizard.steps.count}}" %}</p>

<form action="" method="post">
{% csrf_token %}

{{ wizard.management_form }}

{% if wizard.form.forms  %}
    {{ wizard.form.management_form }}
    {% for form in wizard.form.forms %}
        {{form}}
    {% endfor %}
{% else %}
    {{ wizard.form }}
{% endif %}

{% if wizard.steps.prev %}
<button name="wizard_goto_step" type="submit" value="{{ wizard.steps.first }}">{% trans "Beginning" %}</button>
<button name="wizard_goto_step" type="submit" value="{{ wizard.steps.prev }}">{% trans "Previous step" %}</button>
{% endif %}
<input type="submit" value="submit"/>

</form>

{% endblock %}

将'formtools'添加到我的INSTALLED_APPS

settings.py

DJANGO_APPS = (
    # Default Django apps:
    'django.contrib.auth',
    'django.contrib.contenttypes',
    'django.contrib.sessions',
    'django.contrib.sites',
    'django.contrib.messages',
    'django.contrib.staticfiles',
    'formtools',                 # <===== HERE

    # Useful template tags:
    # 'django.contrib.humanize',

    # Admin panel and documentation:
    'django.contrib.admin',
    # 'django.contrib.admindocs',
)

# Apps specific for this project go here.
LOCAL_APPS = (
    'person',
    'registration',
    'teaching',
    'utils',
)

# See: https://docs.djangoproject.com/en/dev/ref/settings/#installed-apps
INSTALLED_APPS = DJANGO_APPS + LOCAL_APPS

将我的 URLconf 指向您的 WizardView as_view() 方法。

registration/urls.py

from registration.forms import StepForm1, StepForm2
TEST_FORMS = [("test_step_1", StepForm1), ("test_step_2", StepForm2), ]

from registration.views import WizardTest

# I tried in two ways, none of them worked

urlpatterns = patterns('',
         url(r'^wizard$', WizardTest.as_view(TEST_FORMS), name='wizard_test'),
         url(r'^wizard2$', views.wizard, name='wizard_test'),
)

对于第二种方式...

registration/views.py

def wizard(request):
    return WizardTest.as_view(TEST_FORMS)(request)

Answer 1

您的模板遵循什么示例？ The basic layout is in the docs。尝试从这样的开始（如果您对 formtools 生成的字段没有问题，两个页面可以使用相同的模板）：

<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Form Wizard</title>
    {{ wizard.form.media }}

</head>
<body>
{% load i18n %}
<p>Step {{ wizard.steps.step1 }} of {{ wizard.steps.count }}</p>
<form action="" method="post">{% csrf_token %}
<table>
{{ wizard.management_form }}
{% if wizard.form.forms %}
    {{ wizard.form.management_form }}
    {% for form in wizard.form.forms %}
        {{ form }}
    {% endfor %}
{% else %}
    {{ wizard.form }}
{% endif %}
</table>
{% if wizard.steps.prev %}
<button name="wizard_goto_step" type="submit" value="{{ wizard.steps.first }}">{% trans "first step" %}</button>
<button name="wizard_goto_step" type="submit" value="{{ wizard.steps.prev }}">{% trans "prev step" %}</button>
{% endif %}
<input type="submit" name="submit" value="{% trans "submit" %}"/>
</form>
</body>
</html>

Answer 2

我发现了我的错误。我错误地输入了获取模板的方法名称。不是

get_templates_name(self)

但是

get_template_names(self)

它没有获得任何模板，但是当它返回到服务器时它用 HTTP 200 OK 进行应答，因为它没有发现任何错误。

我还发现我的每个步骤的模板都应该扩展主向导模板才能正常工作。使用 'done' 模板不是必需的。

Answer 3

导致 self.cleaned_data['field'] 对我来说为空的主要问题是我需要使用 form.field.html_name 而不是 form.field.name 作为模板的名称字段。

但是，从 Django formtools 提供的文档中，这并不是那么清楚。这是我的模板页面的摘录，所以它更清楚：

<div class="form-group">
  <label>{{ form.account_name.label }}</label>
  <input name="{{ form.account_name.html_name }}"
         value="{{ form.account_name.value|default_if_none:'' }}"
         class="form-control">
</div>

Django formtools 向导生成空白页（未返回错误）

Django formtools wizard produces blank page (No error returned)

python

django

django-forms

django-formwizard