Django create user view that dynamically selects the authentication method, based on a groupdomain object thats one-to-one with the Group and profile which is one-to-one with the User

create_user.py

def create_user(request):
    redirect_to = request.POST.get(REDIRECT_FIELD_NAME,
                                   request.GET.get(REDIRECT_FIELD_NAME, urlresolvers.reverse(user_panel)))
    group = get_object_or_404(GroupDomain, domain=request.META['HTTP_HOST']).group

    verification_methods = group.groupdomain.verification_method
    ctx_forms = {'grade': forms.GradeForm}

    # Get the appropriate forms based on the domain settings
    if GroupDomain.USERNAME in verification_methods:
        ctx_forms['create_user'] = UserCreationForm

    if GroupDomain.EMAIL in verification_methods:
        if ctx_forms['create_user']:
            ctx_forms['email'] = forms.CreateUserWithEmailForm
        else:
            ctx_forms['create_user'] = forms.CreateUserWithEmailForm

    if GroupDomain.PHONE in verification_methods:
        if ctx_forms['create_user']:
            ctx_forms['phone'] = forms.CreateUserWithPhoneForm
        else:
            ctx_forms['create_user'] = forms.CreateUserWithPhoneForm

    if request.method == 'POST':
        form = ctx_forms['create_user'](request.POST)
        if form.is_valid():
            user = form.save()

            user.refresh_from_db()  # load the profile instance created by the signal
            group.user_set.add(user)  # Add him to proper group
            raw_password = form.cleaned_data.get('password1')

            form = ctx_forms.get('grade')(request.POST)
            if form and form.is_valid():
                user.profile.grade = form.cleaned_data.get('grade')

            form = ctx_forms.get('email')(request.POST)
            if form and form.is_valid():
                user.email = form.cleaned_data.get('email')

            form = ctx_forms.get('phone_number')(request.POST)
            if form and form.is_valid():
                user.profile.phone_number = form.cleaned_data.get('phone_number')

            # Ensure the user-originating redirection url is safe.
            if not is_safe_url(url=redirect_to, host=request.get_host()):
                redirect_to = resolve_url(settings.LOGIN_REDIRECT_URL)

            # All checks complete, save the user and log him in. Redirect to appropriate page
            user.save()
            user = authenticate(username=user.username, password=raw_password)
            auth_login(request, user)
            return HttpResponseRedirect(redirect_to)
    else:
        # Init all forms
        for form_type, form in ctx_forms.items():
            ctx_forms['form_type'] = form()

    return render(request, "login_flows/create_account.html", {'forms': ctx_forms, 'next_page': redirect_to})