Re: dlango MultiValueDictKeyError

Hey Ajit,

This error comes when You are trying to get username, passwords from the form.

It is due to the below reason -

In Login,

You are using -> request.POST['username'] which will raise a KeyError exception if 'username' is not in request.POST.

Instead use -> request.POST.get('username') which will return None if 'username' is not in request.POST.

Additionally, .get allows you to provide an additional parameter of a default value which is returned if the key is not in the dictionary.

For example, request.POST.get('username', 'mydefaultvalue')

Hope this helps. If any concern then let us know.


On Mon, 5 Aug 2019 at 15:47, Ajeet Kumar Gupt <ajeetgupt1982@gmail.com> wrote:

Dear Team,

I am developing custom registration and login page for end-user but getting the below error. Please find the views.py code also in the trail.

MultiValueDictKeyError at /login/

'username'

Request Method:	GET
Request URL:	http://127.0.0.1:8000/login/
Django Version:	2.2.3
Exception Type:	MultiValueDictKeyError
Exception Value:	'username'
Exception Location:	C:\Python\Python37\lib\site-packages\django\utils\datastructures.py in __getitem__, line 80
Python Executable:	C:\Python\Python37\python.exe
Python Version:	3.7.3

-- 

Views.py

____________________________

rom django.shortcuts import render
from django.contrib.auth.models import User
from django.http import HttpResponseRedirect
from .forms import RegisterForm
from django.conf import settings
from django.shortcuts import redirect
from django.contrib.auth.decorators import login_required
from django.contrib import messages
from django.contrib.auth import authenticate,login
from django.contrib import auth
from django.core.exceptions import ObjectDoesNotExist


def user_register(request):
    # if this is a POST request we need to process the form data
    template = 'mymodule/register.html'
   # template = 'index.html'
    if request.method == 'POST':
        # create a form instance and populate it with data from the request:
        form = RegisterForm(request.POST)
        # check whether it's valid:
        if form.is_valid():
            if User.objects.filter(username=form.cleaned_data['username']).exists():
                return render(request, template, {
                    'form': form,
                    'error_message': 'Username already exists.'
                })
            elif User.objects.filter(email=form.cleaned_data['email']).exists():
                return render(request, template, {
                    'form': form,
                    'error_message': 'Email already exists.'
                })
            elif form.cleaned_data['password'] != form.cleaned_data['password_repeat']:
                return render(request, template, {
                    'form': form,
                    'error_message': 'Passwords do not match.'
                })
            else:
                # Create the user:
                user = User.objects.create_user(
                    form.cleaned_data['username'],
                    form.cleaned_data['email'],
                    form.cleaned_data['password']
                )
                user.first_name = form.cleaned_data['first_name']
                user.last_name = form.cleaned_data['last_name']
                user.phone_number = form.cleaned_data['phone_number']
                user.save()
                return redirect('index.html')
                # Login the user
                #login(request, user)
                #def user_login(request):
                # redirect to accounts page:
                #return render(request, '/login.html')
               # return HttpResponseRedirect(return, '/login.html')
               # No post data availabe, let's just show the page.
    else:
        form = RegisterForm()
        return render(request, template, {'form': form})





def login_view(request):
    username = request.POST['username']
    password = request.POST['pass']
    users = authenticate(request, username=username, password=password)
    if users is not None:
        login(request, users)
        return redirect('welcome.html')
    else:
        return redirect('index.html')



def logout(request):
    auth.logout(request)
    return render(request, 'login.html')

Thanks & Regards
Ajeet Kumar Gupt
+91-9311232332

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CA%2BTqRsvD7P8Mk4RCUUg-5%3DYTE7PjBnHyJA%3DVZowGgGoYQnyNKw%40mail.gmail.com.

--
You received this message because you are subscribed to the Google Groups "Django users" group.
To unsubscribe from this group and stop receiving emails from it, send an email to django-users+unsubscribe@googlegroups.com.
To view this discussion on the web visit https://groups.google.com/d/msgid/django-users/CAGHZBzzRHrUvP7P1Aa-8qdsaDG65TBXUX54RJ8sxtU1G08c2Fg%40mail.gmail.com.