Change existing database entry from a form

Question

snippets of my code (views and forms)

my views.py:

 def checkout(request):
    print "signup"
    if request.method == 'POST':
        print "post payment"
        form = PaymentForm(request.POST)
        try:
            if form.is_valid():
                print form.cleaned_data
                ui.balance = ui.balance - (form.cleaned_data['amount'] * form.cleaned_data['price'])
                u.first_name = form.cleaned_data['first_name']
                u.last_name = form.cleaned_data['last_name']
                u.save()
                print "after login in signup"
                return redirect("/student/control")


            else:
                print "error"
                print form.errors
        except:
            raise
            print "error here"
            print form.errors
            pass
            #return render(request, 'student/register.html', {'form': form})

    else:
        form = PaymentForm()

    return render(request, 'student/control.html', {'form': form})

and my forms.py:

 class PaymentForm(forms.Form):
    first_name = forms.CharField(max_length = 25)
    last_name = forms.CharField( max_length = 25)
    amount = forms.IntegerField()
    price = forms.FloatField()
    def clean(self):
        cleaned_data = super(PaymentForm, self).clean()

        if User.objects.filter(first_name != cleaned_data['first_name']).count():
            raise forms.ValidationError({'first_name':['Name does not exist']})
        if User.objects.filter(last_name != cleaned_data['last_name']).count():
            raise forms.ValidationError({'last_name':['Name does not exist']})

        return cleaned_data

This problem hasn't happened before, as I used this same format for a register page and its working fine. Any suggestions?

Yes, I know PaymentForm lives in forms.py but you need to call it in views.py -> from somewhere.forms import PaymentForm — Gocht
– Gocht, Commented Nov 1, 2015 at 23:29
Don't say that, I am posting this as an answer, becase is a very common problem. — Gocht
– Gocht, Commented Nov 1, 2015 at 23:31

Gocht · Accepted Answer · 2015-11-01 23:33:06Z

1

Keep in mind that you need to import a class to be able to use it.

In this case, you need to use PaymentForm from forms.py in your views.py. So you need to do the import:

# views.py
from somewhere.forms import PaymentForm

Now, you can use PaymentForm in views.py

answered Nov 1, 2015 at 23:33

Gocht

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