Django Forms：尝试验证猫科动物时出现KeyError

Question

In my form.py I'm getting the following error (below) is there anything I have missed that could be explained to me? All I'm trying to do it clean/validate the confirm password field

This is the error:

KeyError at /member/registration/
'passwordConfirm'

response = callback(request, *callback_args, **callback_kwargs)

Users/user/Documents/workspace/project/member/forms.py in clean_password, line 27

forms.py

def clean_password(self):
    password = self.cleaned_data['password']
    passwordConfirm = self.cleaned_data['passwordConfirm']
    if password != passwordConfirm:
        raise forms.ValidationError("Password does not match, try again.")
    return password
    strong text

models.py

from django.db import models
from django.db.models.signals import post_save
from django.contrib.auth.models import User


class Member (models.Model):
    user =  models.OneToOneField(User)
    name = models.CharField(max_length=100)

    def __unicode__(self):
        return self.name

def createUserCallBacks(sender, instance, **kwargs):
    member, new = Member.objects.get_or_create(user=instance)
post_save.connect(createUserCallBacks, User)

view.py

def registration(request):
    if request.user.is_authenticated():
        return HttpResponseRedirect('/error')
    if request.method == 'POST':
        form = RegistrationForm(request.POST)
        if form.is_valid():
            user = User.objects.create_user(username=form.cleaned_data['username'],email=form.cleaned_data['email'], password=form.changed_data['password'])
            user.save()
            member = User.get_profile()
            member.name = form.cleaned_data['name']
            member.save()
            return HttpResponseRedirect('/profile')
        else:
            return render_to_response('pageRegistration.html', {'form':form},context_instance=RequestContext(request))

    else: 
        form = RegistrationForm 
        context = {'form':form}
        return render_to_response('pageRegistration.html', context, context_instance=RequestContext(request))

Answer 1

If you want to check form for two fields you should do that in clean() method rather than individual fields clean method.

Problem that you are seeing is, while you are in clean_password method, cleaned_data do not contain value for 'passwordConfirm' . ie its clean method - clean_passwordConfirm() is not called yet.

Documentation at Cleaning and validating fields that depend on each other

Sample code:

def clean(self):
    try:
        cleaned_data = super(RegistrationForm, self).clean()
        password = cleaned_data['password']
        passwordConfirm = cleaned_data['passwordConfirm']
        if password != passwordConfirm:
            raise forms.ValidationError("Password does not match, try again.")
        return cleaned_data
    except:
        raise forms.ValidationError("Password does not match, try again.")