Form mixins for django

django_form_mixins.py

from django.http import HttpResponseRedirect
from django.contrib.auth.decorators import login_required


class LoginRequiredMixin(object):
    """
    LoginRequired Mixin
    """
    @classmethod
    def as_view(cls, **initkwargs):
        view = super(LoginRequiredMixin, cls).as_view(**initkwargs)
        return login_required(view)


class SameSuccessUrlMixin(object):
    """
    A mixin for form view with the same success url
    """
    def get_success_url(self):
        """
        Returns the supplied URL.
        """
        return self.request.get_full_path()


class GetSessionUserAsEditingObjectMixin(object):
    """
    A mixin which mixes the function get_object and
    returns user according to session user_id as the result.
    """
    def get_object(self, queryset=None):
        """
        Returns the object the view is displaying.
        """
        return self.model.objects.get(pk=self.request.session.get('user_id'))


class GetUserAsEditingObjectMixin(object):
    """
    A mixin which mixes the function get_object and
    returns current user (Client) as the result.
    """
    def get_object(self, queryset=None):
        """
        Returns the object the view is displaying.
        """
        return self.model.objects.get(pk=self.request.user.id)


class RedirectIfAuthenticatedMixin(object):
    """
    A mixin which returns HttpResponseRedirect to form success url
    if user is authenticated and response of parent's get otherwise
    """
    def get(self, request, *args, **kwargs):
        """
        Handles GET requests and instantiates a blank version of the form.
        """
        if self.request.user.is_authenticated():
            response = HttpResponseRedirect(self.get_success_url())
        else:
            response = super(RedirectIfAuthenticatedMixin, self).get(request, *args, **kwargs)
        return response