【发布时间】：2014-08-02 03:03:00
【问题描述】：
我有一个来自单个模型的三页表单列表。我第一次可以保存模型，但是当我想编辑模型时，只有第一个表格显示初始值，后续表格不显示初始数据。但是当我从视图中打印initial_dict 时，我可以正确地看到所有初始视图。我在表单向导上关注了这个blog。
这是我的model.py:
class Item(models.Model):
user=models.ForeignKey(User)
price=models.DecimalField(max_digits=8,decimal_places=2)
image=models.ImageField(upload_to="assets/", blank=True)
description=models.TextField(blank=True)
def __unicode__(self):
return '%s-%s' %(self.user.username, self.price)
urls.py:
urlpatterns = patterns('',
url(r'^create/$', MyWizard.as_view([FirstForm, SecondForm, ThirdForm]), name='wizards'),
url(r'^edit/(?P<id>\d+)/$', 'formwizard.views.edit_wizard', name='edit_wizard'),
)
forms.py：
class FirstForm(forms.Form):
id = forms.IntegerField(widget=forms.HiddenInput, required=False)
price = forms.DecimalField(max_digits=8, decimal_places=2)
#add all the fields that you want to include in the form
class SecondForm(forms.Form):
image = forms.ImageField(required=False)
class ThirdForm(forms.Form):
description = forms.CharField(widget=forms.Textarea)
views.py：
class MyWizard(SessionWizardView):
template_name = "wizard_form.html"
file_storage = FileSystemStorage(location=os.path.join(settings.MEDIA_ROOT))
#if you are uploading files you need to set FileSystemStorage
def done(self, form_list, **kwargs):
for form in form_list:
print form.initial
if not self.request.user.is_authenticated():
raise Http404
id = form_list[0].cleaned_data['id']
try:
item = Item.objects.get(pk=id)
###################### SAVING ITEM #######################
item.save()
print item
instance = item
except:
item = None
instance = None
if item and item.user != self.request.user:
print "about to raise 404"
raise Http404
if not item:
instance = Item()
for form in form_list:
for field, value in form.cleaned_data.iteritems():
setattr(instance, field, value)
instance.user = self.request.user
instance.save()
return render_to_response('wizard-done.html', {
'form_data': [form.cleaned_data for form in form_list], })
def edit_wizard(request, id):
#get the object
item = get_object_or_404(Item, pk=id)
#make sure the item belongs to the user
if item.user != request.user:
raise HttpResponseForbidden()
else:
#get the initial data to include in the form
initial = {'0': {'id': item.id,
'price': item.price,
#make sure you list every field from your form definition here to include it later in the initial_dict
},
'1': {'image': item.image,
},
'2': {'description': item.description,
},
}
print initial
form = MyWizard.as_view([FirstForm, SecondForm, ThirdForm], initial_dict=initial)
return form(context=RequestContext(request), request=request)
模板：
<html>
<body>
<h2>Contact Us</h2>
<p>Step {{ wizard.steps.step1 }} of {{ wizard.steps.count }}</p>
{% for field in form %}
{{field.error}}
{% endfor %}
<form action={% url 'wizards' %} method="post" enctype="multipart/form-data">{% 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 }}">"first step"</button>
<button name="wizard_goto_step" type="submit" value="{{ wizard.steps.prev }}">"prev step"</button>
{% endif %}
<input type="submit" value="Submit" />
</form>
</body>
</html>
编辑：
我注意到的一个如下：
在编辑模式下，即当我在以下网址时：http://127.0.0.1:8000/wizard/edit/1/，
它正确显示了第一个表单数据，当我单击提交时，它不会带我进入编辑模式的第 2 步，即 URL 更改为 http://127.0.0.1:8000/wizard/create/。
如果在第一步中单击编辑 url 上的submit（如/wizard/edit/1），则保持相同的 url，然后表单将在下一步中获取其初始数据。但我不知道如何避免网址更改为/wizard/create
【问题讨论】：
-
我看到的一个问题是您不需要将
RequestContext()传递给向导视图调用，因此请尝试删除它。 -
@Rohan 我尝试删除
RequestContext()但这没有帮助 -
@Rohan：我在编辑中添加了更多信息。我希望你能帮忙。谢谢
标签： django django-forms django-views django-formwizard