[英]Django 1.9 using django sessions in two page forms
How can I use Django sessions to have a user be able to start a form on one page, and move to the next page and have them complete the form?我如何使用 Django 会话让用户能够在一页上启动表单,然后移动到下一页并让他们完成表单?
I have looked into pagination and wizard forms, but I don't get them at all.我已经研究了分页和向导形式,但我根本不了解它们。
When I have one page with a small portion of a model I'm using - in forms - and another page with the rest of the model - forms.py
with the rest of the model info - I can use the first form perfectly.当我有一个页面包含我正在使用的模型的一小部分 - 在表单中 - 另一个页面包含模型的其余部分 -
forms.py
以及模型信息的其余部分 - 我可以完美地使用第一个表单。
But when I move to the next page, I get an error saying (1048, "Column 'user_id' cannot be null")
.但是当我移动到下一页时,我收到一条错误消息
(1048, "Column 'user_id' cannot be null")
。
My best guess is to use Django sessions to fix this issue.我最好的猜测是使用 Django 会话来解决这个问题。 I don't want the user to have to put in their username and password a second time to get this to work.
我不希望用户必须再次输入他们的用户名和密码才能使其正常工作。 Any ideas?
有任何想法吗?
my models/forms.py:我的模型/forms.py:
class Contact(models.Model):
user = models.OneToOneField(User)
subject = models.CharField(max_length=100, blank=True)
sender = models.EmailField(max_length=100, blank=True)
message = models.CharField(max_length=100, blank=True)
def __str__(self):
return self.user.username
class UserForm(forms.ModelForm):
password = forms.CharField(widget=forms.PasswordInput())
class Meta:
model = Contact
fields = ('username', 'password', 'email')
class ContactForm1(forms.Form):
class Meta:
model = Contact
fields = ('subject', 'sender')
class ContactForm2(forms.Form):
message = forms.CharField(widget=forms.Textarea)
class Meta:
model = Contact
fields = ('message',)
views:意见:
def contact(request):
registered = False
if request.method =='POST':
user = UserForm(request.POST)
contact = ContactForm1(request.POST)
if user.is_valid() and contact.is_valid():
user = user.save()
user.set_password(user.password)
user.save()
contact = contact.save(commit=False)
contact.user = user
registered = True
return render(request, 'mysite/contact.html', {'user': user, 'contact': contact, 'registered': registered})
def contact_second(request):
if request.method =='POST':
contact = ContactForm2(request.POST)
if contact.is_valid():
contact = contact.save(commit=False)
contact.save()
return render(request, 'mysite/contact_two.html', {'contact': contact}
I think it's a good idea to use sessions to store the forms because you don't want on each page to store the user input into the database because what if s/he change mind in the 3rd page and s/he wants to discard the registration or whatever it is?我认为使用会话来存储表单是一个好主意,因为您不希望在每个页面上都将用户输入存储到数据库中,因为如果他/他在第三页改变主意并且他/他想要丢弃注册或其他什么?
I think is better to store the forms in session until you get in the last page, you ensure that everything is valid and then save the data in the database.我认为最好将表单存储在会话中,直到进入最后一页,确保一切都有效,然后将数据保存在数据库中。
So let's say that the bellow code is in one of the view that will serve the first form/page.因此,假设波纹管代码位于为第一个表单/页面提供服务的视图中。 You retrieve the data from the POST request and you check if the given data are valid using the
form.is_valid()
, you then store the form.cleaned_data
(which contains the user's validated data) to a session variable.您从 POST 请求中检索数据,并使用
form.is_valid()
检查给定数据是否有效,然后将form.cleaned_data
(包含用户的验证数据)存储到会话变量中。
form = CustomForm(request.POST)
...
if form.is_valid():
request.session['form_data_page_1'] = form.cleaned_data
Note here that you may need to add code to redirect the user to the next page if form.is_valid()
is true, something like this:请注意,
if form.is_valid()
为 true,您可能需要添加代码以将用户重定向到下一页,如下所示:
if form.is_valid():
request.session['form_data_page_1'] = form.cleaned_data
return HttpResponseRedirect(reverse('url-name-of-second-page'))
Then in any other view let's say in the view that is going to serve the second page you can retreive the from data from the first page like this:然后在任何其他视图中,让我们说在要为第二页提供服务的视图中,您可以像这样从第一页检索 from 数据:
first_page_data = request.session['form_data_page_1']
And you can do whatever you want with them as if it was after you executed the form.is_valid()
in the first view.您可以对它们做任何您想做的事情,就像在第一个视图中执行
form.is_valid()
之后一样。
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