Mixin to adding AJAX support to a form view.

django_jsonable_form_mixin.py

from django.http import JsonResponse
from django.conf import settings

from django_remote_forms.forms import RemoteForm


class JsonableFormMixin(object):
    """
    Mixin to adding AJAX support to a form view.
    Must be used with django model editing views
    """
    def get(self, request, *args, **kwargs):
        """
        Handles GET requests and instantiates a blank version of the form.
        """
        if self.request.is_ajax():

            form_dict = RemoteForm(self.get_form()).as_dict()
            if settings.CSRF_COOKIE_NAME in request.COOKIES.keys():
                form_dict['csrfmiddlewaretoken'] = request.COOKIES[settings.CSRF_COOKIE_NAME]
            response = JsonResponse(form_dict, safe=False)
        else:
            response = super(JsonableFormMixin, self).get(self)
        return response

    def form_invalid(self, form):
        """
        If the form is invalid, re-render the context data with the
        data-filled form and errors.
        """
        if self.request.is_ajax():
            response = JsonResponse(form.errors, status=400)
        else:
            response =  super(JsonableFormMixin, self).form_invalid(form)
        return response

    def form_valid(self, form):
        """
        We make sure to call the parent's form_valid() method because
        it might do some processing (in the case of CreateView, it will
        call form.save() for example).
        """
        if self.request.is_ajax():
            data = {
                'pk': self.object.pk,
            }
            response = JsonResponse(data)
        else:
            response = super(JsonableFormMixin, self).form_valid(form)
        return response