class RegistrationFormView(View):
    form_class = RegistrationForm
    template_name = 'registration/registration_form.html'

# display blank form
def get(self, request):
    form = self.form_class(None)
    return render(request, self.template_name, {'form': form})

# process form data
def post(self, request):
    form = self.form_class(request.POST)

    if form.is_valid():

        user = form.save(commit=False)

        # cleaned (normalized) data
        username = form.cleaned_data['username']
        password = form.cleaned_data['password']
        user.set_password(password)
        user.save()

        # returns User objects if credentials are correcot
        user = authenticate(username=username, password=password)

        if user is not None:

            if user.is_active:
                login(request, user)
                return redirect('/dashboard/')

    return render_to_response('registration/registration_form.html', c, context_instance=RequestContext(request))

class RegistrationForm(forms.ModelForm):
    email = forms.EmailField(max_length=30, widget=forms.TextInput(attrs={'placeholder': 'Email Address', 'required':True}))
    username = forms.CharField(max_length=30, widget=forms.TextInput(attrs={'placeholder': 'Username','required':True}))
    password = forms.CharField(max_length=30, widget=forms.PasswordInput(attrs={'placeholder': 'Password','required':True}))
    password2 = forms.CharField(max_length=30, widget=forms.PasswordInput(attrs={'placeholder': 'Re-Enter Password','required':True}))

    class Meta:
        """The model that is extended from django models and the fields below are specified to prevent abstraction"""
        model = User
        fields = ('email', 'username', 'password', 'password2')

    def clean(self):
        cleaned_data = super(registrationForm, self).clean()
        email = cleaned_data.get('email')
        username = cleaned_data.get('username')
        password = cleaned_data.get('password')
        password2 = cleaned_data.get('password2')

        #check if username exist
        user = User.objects.filter(username=username)
        if user:
            raise forms.ValidationError("this username is already exsist")

        #check for password and re-enter password
        if password != password2:
            raise forms.ValidationError("Password does not match")

        #check for email is system
        emails = User.objects.filter(email=email)
        if email:
            raise forms.ValidationError("this email is already registered")

        return cleaned_data

<form class="text-left" method="post" action=".">
    {% csrf_token %}
    {{ form }}
    <input type="submit" value="{% trans 'Register' %}" />
</form>