ajax form using partials taking advantage of class views (new in django 1.3)

ajax_form.py

# -*- coding: utf-8 -*-
from django import forms
from django.views.generic.edit import FormView
from django.utils.translation import ugettext_lazy as _
from django.utils.translation import force_unicode
from ajax import JSONResponseMixin, JSONResponsePartialMixin

class HoneySpotMixin(object):
    error_css_class = 'error'
    required_css_class = 'required'
    
    def clean_name(self):
        #if not 'name' in self.cleaned_data:
        if 'name' in self.cleaned_data:
            if self.cleaned_data['name'] is not u'':
                 raise forms.ValidationError(u'Leave the "name" field empty!')
                
MSG_FAIL = _("Hay errores en los datos enviados")
MSG_SUCCESS = _("Gracias por su interes. Pronto contactaremos con Usted.")

class AjaxFormView(  JSONResponseMixin, FormView ):
    """
    Ajax form view which returns json with list of errors
    ussage::
        class ContatView( AjaxPartialFormView ):
            form_class = ContactForm
            template_name = "contact/contact.html"
    """
    partial_var_name = "form"
    def form_valid(self, form):
        if self.request.is_ajax():
            context = self.get_context_data( form_valid=1, message= MSG_SUCCESS)
            return self.render_to_response( context )
        else:
            return super( AjaxFormView, self).form_valid(form) 

    def form_invalid(self, form):
        errors = [(k, force_unicode( v[0]) ) for k, v in form.errors.items()]
        context = self.get_context_data( form_valid=0, message= MSG_FAIL, errors = errors )
        return self.render_to_response( context )

    def render_to_response(self, context):
        if self.request.is_ajax():
            return JSONResponseMixin.render_to_response(self, context)
        else:
            return FormView.render_to_response(self, context)